SimpliPhi PHI 3.8 Series User manual

© SIMPLIPHI POWER, INC. REV020620

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 2 |
SimpliPhi YourEnergy
Security and Independence
and gain control of your own power.
SimpliPhi Power helps you manage your power as a personal resource. Anytime.
Anywhere. SimpliPhi energy storage optimizes integration of any power
generation source –solar, wind, generator –on or off grid, and protects your
home and mission-critical business functions from power outages and
intermittency. SimpliPhi storage technology reduces operating temperature
constraints, toxic coolants and the risk of thermal runaway. Safe lithium ferrous
phosphate (LFP). No cobalt. No toxic hazards.
SimpliPhi’s battery technology utilizes the industry’s most environmentally
benign chemistry (LFP) combined with proprietary architecture and power
electronics (BMS) to create a portfolio of high performance, scalable and
enduring energy storage solutions that provide power security, resilience and
daily cycling for savings on your utility bill –all with a 98% efficiency rate.
SimpliPhi Power offers proprietary, commercially availableenergy storage and management
systems that are safe, non-toxic, reliable, durable, efficient, highly scalable, and economical over
the lifetime of the PHI Battery.

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 3 |
Table of Contents
1.0 –Introduction ............................................................................................................................................................................................5
1.1 –Online Resources..................................................................................................................................................................................5
1.2 –Technical Support .........................................................................................................................................................................5
1.3 –Product Overview.........................................................................................................................................................................5
1.3.1 –Battery Management System (BMS)..........................................................................................................................5
1.3.2 –Built-In Breaker ...................................................................................................................................................................6
1.4 –Specifications ..................................................................................................................................................................................7
2.0 –Safety ..........................................................................................................................................................................................................8
2.1 –General Safety Instructions......................................................................................................................................................8
2.2 –Response to Emergency Situations.......................................................................................................................................8
3.0 –Pre-Installation ......................................................................................................................................................................................9
3.1 –PHI Battery Performance..........................................................................................................................................................9
3.2 –PHI Battery System Sizing.........................................................................................................................................................9
3.2.1 –Sizing for Maximum Instantaneous Discharge (Load Rate)..............................................................................9
3.2.2 –Sizing for Maximum Instantaneous Charge Rate (DC Coupled) .................................................................11
3.2.3 –Sizing for Maximum Instantaneous Charge Rate (AC Coupled)..................................................................12
3.2.4 –Overall Battery System Sizing ....................................................................................................................................13
4.0 –Installation ............................................................................................................................................................................................14
4.1 –Installation Options...................................................................................................................................................................14
4.2 –Environmental Considerations ............................................................................................................................................14
4.2.1 –Charging at Temperatures Below Freezing .........................................................................................................14
4.2.2 –Explosive Gas Precautions .................................................................................................................................................14
4.2.3 –Anti-Corrosion Protection...........................................................................................................................................14
4.3 –Mounting Hardware .................................................................................................................................................................14
4.4 –Dimensions and Weight ..........................................................................................................................................................15
4.5 –PHI Battery Connection Terminals....................................................................................................................................17
4.5.1 –Batteries with Threaded Studs ..................................................................................................................................17
4.5.2 –Torque Value for Batteries with Threaded Studs ..............................................................................................17
4.5.3 –Batteries with Anderson Connectors ......................................................................................................................17
4.6 –Wiring..............................................................................................................................................................................................18
4.6.1 –Increasing Storage Capacity via Parallel Wiring.................................................................................................18
4.6.2 –Parallel Wiring Batteries with Threaded Studs using Battery Cables ......................................................18
4.6.3 –Parallel Wiring Batteries with Threaded Studs using Interconnecting Busbars ..................................22
4.7 –Battery System Commissioning...........................................................................................................................................23
4.8 –Battery Bank Expansion ..........................................................................................................................................................25
5.0 –Programming.......................................................................................................................................................................................26
5.1 –Operating Parameters per Warranty................................................................................................................................26
6.0 –Troubleshooting.................................................................................................................................................................................28
Appendix A –PHI Battery Safety & Green Attributes, Certifications....................................................................................29
Appendix B –PHI Battery Bank Sizing Guide...................................................................................................................................32
Appendix C –PHI Approved External Chargers .............................................................................................................................36
Appendix D –PHI Legacy Battery Parameters ................................................................................................................................37

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 4 |
CAUTION: THESE 5 THINGS WILL VOID THE PHI WARRANTY & DAMAGE THE
BATTERIES. READ IN FULL PRIOR TO BATTERY INSTALLATION
The following abbreviated guidelines do NOT encompass all PHI battery Warranty details. Failure to adhere
to the Warranty and Installation Manual requirements will Void the Warranty. Read the battery’s complete
Warranty prior to installation and register the battery according to the form found at the bottom of the same
web page address: https://simpliphipower.com/wp-content/uploads/documentation/phi-series/simpliphi-
power-phi-3-8-2-9-1-4-730-warranty.pdf.
CAUTION: The following will result in damage to your PHI batteries and will Void the Warranty:
1. Incorrect battery wiring and/or installation
a. Verify polarity at all connections with a standard voltmeter (1) before energizing the system and (2)
on batteries with threaded stud connections, before switching the built-in circuit breaker to the “ON”
position. Reverse polarity at the PHI Battery terminals will Void the Warranty and destroy the PHI
Batteries.
b. PHI Batteries must be fully charged before commissioning (i.e. before connecting loads). Failure to do
so will damage the PHI batteries and Void the Warranty.
c. Lugs, washers and lug nuts must be installed according to the Installation Manual. Failure to do so will
damage the PHI Batteries and Void the Warranty.
2. Charging the battery in sub-freezing temperatures.
3. Pairing the battery with incompatible equipment. Use of accessories not recommended or sold by the
manufacturer may result in a risk of fire, electric shock, or injury to persons and will Void the Warranty.
a. Contact SimpliPhi Technical Support at [phone] x 1 regarding the compatibility of any
equipment not explicitly listed in the ‘Integration Guides’ section of the Product Documentation web
page (https://simpliphipower.com/product-documentation/).
b. Refer to the SimpliPhi-Approved Chargers list (Appendix C of this document) for all compatible
external / plug-in battery chargers. Use only a SimpliPhi-approved LFP battery charger if ancillary
charging is required before installation, testing or troubleshooting. Failure to use a SimpliPhi-
approved LFP battery charger will damage the PHI Battery and Void the Warranty.
4. Incorrect inverter and/or charge controller settings. Operating the PHI Battery in conjunction with
equipment not programmed to the PHI Battery’s settings will Void the Warranty.
a. Refer to the ‘Integration Guides’ section of the Product Documentation web page
(https://simpliphipower.com/product-documentation/) for all inverter and charge controller settings.
b. Although each PHI Battery contains an internal Battery Management System (BMS) with circuitry
that protects the PHI Battery cells from over-charge, over-discharge and extreme load amperage, the
PHI Battery must always be installed with appropriate inverter and/or charge controller settings and
power electronics to protect the PHI Battery from open solar photovoltaic (PV) voltage and other
high voltage charging sources.
c. Failure to protect the PHI batteries from voltages higher than the battery voltage rating (12, 24 &
48V) will destroy the PHI batteries, cause electrical fires and Void the Warranty.
5. Incorrect battery bank sizing.
a. Exceeding the PHI batteries’ maximum continuous discharge rate or charge rate destroys the PHI
batteries and will Void the Warranty.
b. Refer to Section 3.2 and Appendix B of this Manual for more information on how to accurately and
correctly calculate the PHI battery bank capacity. Failure to do so will destroy the PHI batteries and
Void the Warranty.

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 5 |
The PHI Battery Warranty does NOT cover product damage caused by mishandling or improper use per the
Installation Manual, Integration Guides and Warranty, exposure to liquids, impacts from falling objects or
being dropped, or attempts to repair the battery by any party other than SimpliPhi. The complete list of
Warranty Exclusions is included in the PHI Battery Warranty document: https://simpliphipower.com/wp-
content/uploads/documentation/phi-series/simpliphi-power-phi-3-8-2-9-1-4-730-warranty.pdf.
1.0 –Introduction
1.1 –Online Resources
The Product Documentation section of SimpliPhi’s web site (https://simpliphipower.com/product-
documentation/) includes Specification Sheets, Warranties, Installation & Operator’s Manuals, and
Integration Guides for all SimpliPhi’s current and legacy products.
SimpliPhi’s YouTube channel (https://www.youtube.com/channel/UCcuCaLT_G3Hhumteh-pI5yg/videos) has
instructional videos showing various steps of the battery installation process in detail.
1.2 –Technical Support
SimpliPhi Technical Support (805-640-6700 x 1, [e-mail]) is available to take any
questions regarding this manual or general installation questions. For assistance with battery system
commissioning, SimpliPhi asks that a commissioning call be scheduled ahead of time with Technical Support.
We encourage you or your installer to contact SimpliPhi with any questions. We are committed to working with
you and your installation team to achieve a safe, reliable storage system that will provide years of maintenance-
free service that is covered by our Warranty terms & conditions.
1.3 –Product Overview
The PHI deep-cycle Lithium Ferro Phosphate (LFP) Battery is optimized with proprietary cell architecture,
power electronics, Battery Management System (BMS), manufacturing materials and processes. This assures
the highest grade and quality, longest cycle-life, greatest efficiency and freedom from material impurities,
toxicity and hazardous risk. The PHI Battery is modular, lightweight and scalable. It provides power security
and seamless integration of renewable and traditional sources of energy in conjunction with or independent of
the grid.
1.3.1 –Battery Management System (BMS)
Each PHI Battery contains circuitry that protects the LFP cells from overcharge, over-discharge and
extreme load amperage. If pre-programmed BMS values are exceeded, the protective circuitry will
shut down the flow of electricity to/from the PHI Batteries. In some cases, this will result in the need
to re-set the BMS (see Section 6.0 - Troubleshooting of this Manual) and re-initialize an
inverter/charger. Often, inverter system settings will be saved within the inverter memory storage
and will not need to be reset. However, this is not an absolute standard but is common in most
inverter/chargers and should be anticipated if the PHI Batteries go into a state of self-protection and
shut down the flow of electricity. Refer to SimpliPhi’s Integration Guides for inverter and/or charge
controller settings (https://simpliphipower.com/product-documentation/).

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 6 |
CAUTION: Although each PHI Battery contains an internal BMS with circuitry that protects
the PHI Battery cells from over-charge, over-discharge and extreme load amperage, the PHI
Batteries must always be installed with appropriate inverter and/or charge controller
settings to protect the PHI Battery from open PV voltage and other high voltage charging
sources. Exposure to higher voltage than the PHI battery rating (12, 24 &48V) will destroy
the PHI batteries and Void the Warranty.
1.3.2 –Built-In Breaker
PHI batteries with threaded stud connections (such as battery models PHI 3.8, PHI 2.9, PHI 3.5, etc.)
are outfitted with a hydraulic/magnetic circuit breaker. This breaker increases safety during shipping
and installations and allows the battery to effectively be turned “OFF” or “ON.” The breaker works in
conjunction with the battery’s built-in BMS and creates additional safety, efficiency and functionality
in the overall power storage system.
Figure 1.0 –PHI 3.8 kWh Circuit Breaker
NOTE: Not all PHI Battery models (such as the PHI 2.9 Lo-Profile, PHI 1.4, PHI 1.2 High Output, etc.) include built-in breakers.
In either case, circuit breakers, disconnects and fuses should be employed throughout several points of a power storage and
generation installation to effectively isolate and protect all components of the system to safeguard against faults, short circuits,
polarity reversals or a failure of any component in the overall system. Fuses, breakers, wiring ratings and values should be
determined by established electrical codes and standards and evaluated by certified electricians, licensed installers, and
regional code authorities.

SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 7 |
1.4 –Specifications
Please review Table 1.0 below for PHI Battery specifications, including physical dimensions, Warranty period, and technical data.
Table 1.0 - PHI Battery Specifications
PHI 3.8™
PHI 2.9™
PHI 1.4™
PHI 730™
24V
48V
24V
48V
24V
12V
24V
12V
DC Voltages - Nominal
25.6 VDC
51.2 VDC
25.6 VDC
51.2 VDC
25.6 VDC
12.8 VDC
25.6 VDC
12.8 VDC
Amp-Hours
151 Ah
75 Ah
115 Ah
57 Ah
57 Ah
115 Ah
28.5 Ah
57 Ah
Rated Capacity
3.8 kWh DC
3.8 kWh DC
2.9 kWh DC
2.9 kWh DC
1.4 kWh DC
1.4 kWh DC
730 Wh DC
730 Wh DC
MAX Discharge Rate
(10 minutes)
60 Amps DC
(1.53 kW DC)
60 Amps DC
(3.07 kW DC)
60 Amps DC
(1.53 kW DC)
60 Amps DC
(3.07 kW DC)
60 Amps DC
(1.53 kW DC)
60 Amps DC
(768 W DC)
25 Amps DC
(640 W DC)
50 Amps DC
(640 W DC)
MAX Continuous Discharge
& Charge Rate
45 Amps DC
(1.15 kW DC)
37.5 Amps DC
(1.92 kW DC)
45 Amps DC
(1.15 kW DC)
28.5 Amps DC
(1.45 kW DC)
28.5 Amps DC
(729.6 W DC)
45 Amps DC
(576 W DC)
14 Amps DC
(358.4 W DC)
28.5 Amps DC
(364.8 W DC)
DC Voltage Range1
24 to 28 VDC
48 to 56 VDC
24 to 28 VDC
48 to 56 VDC
24 to 28 VDC
12 to 14 VDC
24 to 28 VDC
12 to 14 VDC
Depth of Discharge1
up to 100%
Operating Efficiency
98%
Charging Temperature1
32° to 120° F (0° to 49° C)
Operating Temperature1
-4° to 140° F (-20° to 60° C)
Storage Temperature
6 months: 14° to 77° F (-10° to 25° C)
3 months: -4° to 113° F (-20° to 45° C)
Self-Discharge Rate
< 1% per month
Warrantied Cycle Life
10,000 cycles @ 80% DOD / 5,000 cycles @ 90% DOD / 3,500 cycles @ 100% DOD
Memory Effect
None
Warranty Period
10 Years
Weight
78.24 lbs. (35.5 kg)
61.06 lbs. (27.7 kg)
33.28 lbs. (15.1 kg)
17.73 lbs. (8 kg)
Dimensions (W x H x D)
13.5 x 14 x 8 in.
(15.5” H w/terminals) / 0.88 ft3
(34.3 x 35.6 x 20.3 cm / 0.025 m3)
11.25 x 11 x 9.5 in.
(12.75” H w/terminals) / 0.68 ft3
(28.6 x 27.9 x 24.1 cm / 0.019 m3)
11.25 x 9.25 x 6.25 in. / 0.37 ft3
(23.5 x 28.6 x 15.9 cm / 0.011 m3)
11.25 x 5.25 x 6.25 in. / 0.21 ft3
(28.6 x 13.3 x 15.9 cm / 0.006 m3)
Lo-Profile: 17.5 x 14 x 5 in. / 0.71 ft3
(44.45 x 35.56 x 12.7 cm / 0.92 m3)
Notes:
•1Max operating ranges. Refer to Warranty for recommended conditions.
•Specifications are typical/nominal. Subject to change without notice.
•There is less than 1% loss of energy during charging.

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail] | SimpliPhiPower.com
| 8 |
2.0 –Safety
For safety reasons, read all instructions and cautionary markings on the PHI Batteries, and all appropriate sections
of this manual. Failure to follow instructions provided in the Installation Manual, Integration Guides and Warranty
will Void the Warranty.
2.1 –General Safety Instructions
•Do not operate if the PHI Battery has been damaged in any way during shipping or otherwise.
•To reduce the chance of short-circuits, always use insulated tools when installing or working with PHI
batteries or other electrical equipment.
•Remove personal metal items such as rings, bracelets, necklaces, and watches when working with PHI
batteries and electrical equipment. Wear insulated gloves and rubber shoes.
•PHI Batteries pose some risk of shock or sparking during the installation and initial wiring and connection
process. This is consistent with all other battery-based storage formats. For batteries with threaded stud
connections, be sure the built-in breaker is in the “OFF” position to minimalize the risk of shock or sparks
during the installation and commissioning of the system.
•To avoid a risk of fire and electric shock, make sure that existing system wiring is in good condition and that
the wire is not undersized. Do not operate the PHI Battery in conjunction with damaged or substandard
wiring.
These safety precautions are in addition to the Warnings previously outlined on page 4 of this Manual.
2.2 –Response to Emergency Situations
As with any battery, if the PHI Battery’s cells are severely damaged due to physical abuse, reverse polarity, high
voltage, unmitigated current or other electrical phenomenon incurred outside of Warranted specifications, it can
cause electrolyte leakage and other failures. The electrolyte can be ignited by an open external flame. However,
unlike other lithium ion batteries with cobalt oxides (e.g. LCO, NCM and NCA), the PHI LFP Batteries’ electrolyte
and other material components generate a limited amount of heat and do not go into a state of thermal runaway with
fire propagation. The SimpliPhi UL 1973 Battery Certification verifies “No Thermal Runaway” (see MSDS for
chemical analyses).
While PHI Batteries do not go into thermal runaway with fire propagation, the following protocol should be followed
in the event that the PHI batteries are subjected to electrical fire caused by other system components or failures:
•Ensure that the system is no longer energized, either from the solar array or the grid (main disconnect).
•Separate any external cables from batteries if present (cut if necessary) using insulated tools.
•Wear a respirator or dust mask to avoid inhaling soot/dust.
•Wear insulating and abrasion-resistant gloves (if permeable, over nitrile or similar gloves).
•Move battery debris into non-conductive bins capable of handling the weight.
•Dispose as regulations require.
CAUTION: While water is an acceptable and effective extinguishing agent for the PHI Core
Power and Peak Power Battery models, the Balance of System equipment used in conjunction
with the PHI Batteries may require specialized extinguishers such as FM-200 or CO2
suppression systems.

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 9 |
3.0 –Pre-Installation
3.1 –PHI Battery Performance
PHI Batteries do not need to be de-rated unless running continuously at more than 90% capacity, at temperatures
below 32° F (0° C), or above 113° F (45° C). To achieve the greatest warrantied cycle life of 10,000 cycles, PHI
Batteries are typically operated at 80% maximum Depth of Discharge.
All PHI Batteries are balanced during final production and testing stages. Following proper wiring guidelines ensures
that a system will not require any manual balancing processes.
3.2 –PHI Battery System Sizing
PHI Batteries are designed to operate at the continuous ratings specified in Table 1.0 –PHI Battery Specifications.
Therefore, a properly sized PHI Battery bank must be sized to handle both the inverter’s “load rate” as well as the
maximum potential charge rate from the solar photovoltaic (PV) array. Take care to consider not only the energy
(kWh) requirement of the battery bank, but also all other power-related sizing parameters, as outlined in Sections
3.2.1, 3.2.2 or 3.2.3 and 3.2.4. Failure to do so will Void the Warranty.
CAUTION: PHI Battery bank sizing not in accordance with the following sections will damage
the PHI batteries and Void the Warranty
3.2.1 –Sizing for Maximum Instantaneous Discharge (Load Rate)
The load rate is the amount of power that is discharged from the battery bank to the loads. This may include
both alternating current (AC) and/or direct current (DC) loads. PHI Battery banks are sized so that the
batteries’ combined maximum continuous discharge rate meets or exceeds the load rate.
𝑃𝐻𝐼 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝐵𝑎𝑛𝑘 𝑀𝐴𝑋 𝑐𝑜𝑛𝑡𝑖𝑛𝑢𝑜𝑢𝑠 𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑟𝑎𝑡𝑒 𝑘𝑊 𝐷𝐶
≥(𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑟 𝐷𝐶 𝐿𝑜𝑎𝑑 𝑅𝑎𝑡𝑒)+(𝐷𝐶 𝐿𝑜𝑎𝑑𝑠, 𝑖𝑓 𝑎𝑛𝑦)
Because most loads are AC loads, the load rate is typically represented by the inverter’s AC Power Output
rating. Convert the inverter’s maximum potential AC power draw to the maximum potential DC power draw
from the battery bank by factoring in the inverter’s efficiency rating.
𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑟 𝐷𝐶 𝐿𝑜𝑎𝑑 𝑅𝑎𝑡𝑒 = (𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑟 𝑝𝑜𝑤𝑒𝑟 𝑟𝑎𝑡𝑖𝑛𝑔 𝑘𝑊 𝐴𝐶)÷(𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑟 𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦)
Example: An inverter rated at 5 kW AC and 92% efficiency potentially draws 5.4 kW DC from the battery
bank.
𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑟 𝐷𝐶 𝐿𝑜𝑎𝑑 𝑅𝑎𝑡𝑒 = (5 𝑘𝑊 𝐴𝐶)÷(0.92)= 𝟓. 𝟒 𝑘𝑊 𝐷𝐶
If the system includes DC Loads, no AC-to-DC conversion is necessary. Calculate the minimum quantity of
PHI Batteries needed to ensure that the battery bank does not over-discharge by dividing the load rate by

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 10 |
the MAX Continuous Discharge Rate per PHI Battery (found in Table 1.0 or on the relevant battery’s
specification sheet).
(𝐿𝑜𝑎𝑑 𝑅𝑎𝑡𝑒)÷(𝑀𝐴𝑋 𝐶𝑜𝑛𝑡𝑖𝑛𝑢𝑜𝑢𝑠 𝐷𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
= 𝑀𝑖𝑛𝑖𝑚𝑢𝑚 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦 𝑡𝑜 𝑝𝑟𝑒𝑣𝑒𝑛𝑡 𝑜𝑣𝑒𝑟𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒
Example A: Three PHI 3.8 kWh-51.2Vnominal batteries must be paired with an inverter rated at 5 kW AC and
92% efficiency to ensure the PHI Battery bank does not over-discharge to power the loads.
(5.4 𝑘𝑊 𝐷𝐶)÷(1.92 𝑘𝑊 𝐷𝐶)= 2.83 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟑
Example B: Five PHI 3.8-25.6Vnominal batteries must be paired with an inverter rated at 5 kW AC and 92%
efficiency to ensure the PHI Battery bank does not over-discharge to power the loads.
(5.4 𝑘𝑊 𝐷𝐶)÷(1.15 𝑘𝑊 𝐷𝐶)= 4.72 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟓
Note: Notice that the two different model batteries in the above example (51.2Vnominal and 25.6V nominal) have
the same capacity rating (3.8 kWh) but different MAX Continuous Discharge ratings. In applications where
greater instantaneous power is required of the battery, it is therefore more efficient to use the PHI 3.8
kWh-51.2Vnominal battery with 1.92 kW of maximum continuous discharge versus the PHI 3.8 kWh-
25.6Vnominal battery with 1.15 kW of continuous discharge. The same advantages apply when examining the
two different model batteries’ surge capacity.
Example A and Example B, compared:
𝑘𝑊 =𝑉𝑜𝑙𝑡𝑠 × 𝐴𝑚𝑝𝑠
1,000
AC Load
DC Load
(inv eff =
92%)
PHI 3.8 kWh-51.2V MAX
Continuous Discharge
PHI 3.8 kWh-51.2V Surge
Discharge
Battery QTY
Needed to Meet
Load
Requirement
(Continuous)
Battery QTY
Needed to Meet
Load
Requirement
(10 min. Surge)
5 kW AC
5.4 kW DC
37.5 ADC
1.92 kW DC
60 ADC
3.072 kW DC
2.8 →3
1.8 →2
PHI 3.8 kWh-25.6V MAX
Continuous Discharge
PHI 3.8 kWh-25.6V Surge
Discharge
Battery QTY
Needed to Meet
Load
Requirement
(Continuous)
Battery QTY
Needed to Meet
Load
Requirement
(10 min. Surge)
5 kW AC
5.4 kW DC
45 ADC
1.152 kW DC
60 ADC
1.536 kW DC
4.7 →5
3.5 →4
Refer to the Battery Bank Sizing for Maximum Instantaneous Discharge (Load Rate) tables in Appendix B of
this Manual for a complete list of common battery-based inverters and the minimum quantity of PHI
Batteries those inverters need to be paired with to ensure that the PHI Battery bank does not over-

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 11 |
discharge. Over-discharging the PHI Batteries will destroy them and Void the Warranty.
In the case where the inverter’s AC Power Output rating exceeds the connected loads’ actual power draw
(i.e. the inverter is rated at 5 kW but all loads amount to 3 kW of maximum instantaneous power draw),
SimpliPhi still expects that the proper additional precautions be made to ensure that the PHI Battery bank is
not over-discharged. This typically involves the installation of an additional overcurrent protection device
between the PHI Battery bank and the inverter to ensure that the PHI Battery bank does not discharge
beyond its maximum instantaneous power rating. Failure to do so will destroy the PHI batteries and Void
the Warranty.
𝑃𝐻𝐼 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝐵𝑎𝑛𝑘 𝑀𝐴𝑋 𝑐𝑜𝑛𝑡𝑖𝑛𝑢𝑜𝑢𝑠 𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑟𝑎𝑡𝑒
=(𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦)×(𝑀𝐴𝑋 𝐶𝑜𝑛𝑡𝑖𝑛𝑢𝑜𝑢𝑠 𝐷𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
Example: Two PHI 3.8 kWh-51.2Vnominal batteries must be installed with an additional 75 ADC-rated
breaker between the battery bank and the inverter.
(𝑃𝐻𝐼 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝐵𝑎𝑛𝑘 𝑀𝐴𝑋 𝑐𝑜𝑛𝑡𝑖𝑛𝑢𝑜𝑢𝑠 𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑟𝑎𝑡𝑒)= 2 × 37.5𝐴𝐷𝐶 = 75𝐴𝐷𝐶
3.2.2 –Sizing for Maximum Instantaneous Charge Rate (DC Coupled)
In a DC Coupled system, the solar PV array output can be mitigated using charge controllers. However,
reducing the solar array’s power output using charge controller programming implies that the PV array’s
output is also reduced for the entire remainder of the system, including the solar power available for
powering loads and for exporting to the grid. Furthermore, greatly reducing the PV array’s output via the
charge controllers effectively wastes the solar PV array’s power and puts strain on the charge controllers.
Calculate the minimum quantity of PHI Batteries needed to prevent over-charge from the solar PV array by
considering both the solar array size and the charge controller’s potential output. Whichever value is less
should be used to size the PHI Battery Bank. If the solar array’s maximum potential current output is less
than the paired charge controller’s Output Amps rating, then the solar array’s maximum potential current
output can be used to size the PHI Battery bank. If the charge controller’s Amp rating is less than the solar
array’s maximum potential current output, then the charge controller’s rating is used to size the PHI Battery
bank.
Divide the system’s potential charging current by the MAX Continuous Charge Rate per PHI Battery (found
in Table 1.0 or on the relevant battery’s specification sheet) to calculate the minimum quantity of PHI
Batteries needed to ensure that the solar PV array does not over-charge the battery bank.
Example A: Three PHI 3.8 kWh-51.2Vnominal batteries (used in a 48-Volt system) must be paired with a
4,500-Watt solar PV array wired to an 80 Amp-rated charge controller. In this case, the 80-Amp charge
controller is used to determine the minimum PHI Battery quantity needed to prevent over-charging from
the solar PV.
𝑊𝑎𝑡𝑡𝑠 = 𝐴𝑚𝑝𝑠 × 𝑉𝑜𝑙𝑡𝑠
4,500 𝑊𝑎𝑡𝑡 𝑆𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 = 𝐴𝑚𝑝𝑠 × 48 𝑉𝑜𝑙𝑡𝑠
4,500 𝑊𝑎𝑡𝑡𝑠
48 𝑉𝑜𝑙𝑡𝑠 =𝟗𝟑.𝟕𝟓 𝐴𝑚𝑝𝑠 = 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 12 |
80 𝐴𝑚𝑝𝑠 < 93.75 𝐴𝑚𝑝𝑠 → 𝟖𝟎 𝐴𝑚𝑝𝑠
= 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡 𝑡ℎ𝑟𝑜𝑢𝑔ℎ 𝑡ℎ𝑒 𝑐ℎ𝑎𝑟𝑔𝑒 𝑐𝑜𝑛𝑡𝑟𝑜𝑙𝑙𝑒𝑟
(𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑐ℎ𝑎𝑟𝑔𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡)÷(𝑀𝐴𝑋 𝐶ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
= 𝑀𝑖𝑛𝑖𝑚𝑢𝑚 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦 𝑡𝑜 𝑝𝑟𝑒𝑣𝑒𝑛𝑡 𝑜𝑣𝑒𝑟𝑐ℎ𝑎𝑟𝑔𝑒
(80𝐴)÷(37.5𝐴)= 2.13 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟑
Example B: Two PHI 3.8 kWh-25.6Vnominal batteries (used in a 24-Volt system) must be paired with a 2,000-
Watt solar PV array wired to a 100 Amp-rated charge controller. In this case, the 2,000-Watt solar array is
used to determine the minimum PHI Battery quantity needed to prevent over-charging from the solar PV.
𝑊𝑎𝑡𝑡𝑠 = 𝐴𝑚𝑝𝑠 × 𝑉𝑜𝑙𝑡𝑠
2,000 𝑊𝑎𝑡𝑡 𝑆𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 = 𝐴𝑚𝑝𝑠 × 24 𝑉𝑜𝑙𝑡𝑠
2,000 𝑊𝑎𝑡𝑡𝑠
24 𝑉𝑜𝑙𝑡𝑠 =𝟖𝟑.𝟑𝟑 𝐴𝑚𝑝𝑠 = 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡
83.3 𝐴𝑚𝑝𝑠 < 100 𝐴𝑚𝑝𝑠 → 𝟖𝟑. 𝟑 𝐴𝑚𝑝𝑠
= 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡 𝑡ℎ𝑟𝑜𝑢𝑔ℎ 𝑡ℎ𝑒 𝑐ℎ𝑎𝑟𝑔𝑒 𝑐𝑜𝑛𝑡𝑟𝑜𝑙𝑙𝑒𝑟
(𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑐ℎ𝑎𝑟𝑔𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡)÷(𝑀𝐴𝑋 𝐶ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
= 𝑀𝑖𝑛𝑖𝑚𝑢𝑚 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦 𝑡𝑜 𝑝𝑟𝑒𝑣𝑒𝑛𝑡 𝑜𝑣𝑒𝑟𝑐ℎ𝑎𝑟𝑔𝑒
(83.3𝐴)÷(45𝐴)= 1.85 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟐
Refer to the Battery Bank Sizing for Maximum Instantaneous Charge Rate tables in Appendix B of this
Manual for a complete list of common charge controllers and the minimum quantity of PHI Batteries those
controllers need to be paired with to ensure that the PHI Battery bank does not over-charge (assuming that
the charge controllers’ full current output rating is utilized). Failing to do so will destroy the PHI batteries
and Void the Warranty.
3.2.3 –Sizing for Maximum Instantaneous Charge Rate (AC Coupled)
In an AC Coupled system, charge controllers do not regulate the PV solar array’s output, and many battery-
based inverters fail to effectively regulate the array’s output for battery charging. Therefore, in an AC
Coupled system, SimpliPhi assumes that all the connected PV array’s potential power output will charge the
system’s batteries. Determine the minimum quantity of PHI Batteries needed to prevent over-charge from
the solar PV array by dividing the solar array’s power rating by the MAX Continuous Charge Rate per PHI
Battery (found in Table 1.0 or on the relevant battery’s specification sheet).
Example: Four PHI 3.8 kWh-51.2Vnominal batteries must be paired with 6 kW of AC Coupled solar PV to
ensure the PHI Battery bank does not over-charge from the solar array.
(6 𝑘𝑊)÷(1.92 𝑘𝑊)= 3.13 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 4

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 13 |
3.2.4 –Overall Battery System Sizing
Size the PHI battery bank so that the minimum number of batteries in the bank is the greater of the two
figures obtained from the Discharge and Charge calculations. For example, a system that requires 5 PHI
Batteries to ensure that the battery bank does not over-discharge and 3 PHI Batteries to ensure that the
battery bank does not over-charge, should include a final minimum quantity of 5 batteries. Failure to do so
will destroy the PHI batteries and will Void the Warranty.
Note that this quantity of PHI Batteries is the minimum requirement to prevent over-discharge and over-
charge from an instantaneous power perspective. The system may need more PHI Batteries in the battery
bank in order to meet the system’s energy requirement (the amount of power the batteries must supply to
the loads over time).
Refer to SimpliPhi’s online Battery Bank Sizing Estimator tool for assistance with sizing the PHI Battery
Bank according to connected loads and the desired number of days of autonomy:
https://simpliphipower.com/support/battery-bank-sizing-estimator/.
CAUTION: Not all system discharge or charge characteristics can be mitigated via
programming. Under-sizing a PHI Battery bank relative to the system’s maximum discharge or
charge rate will destroy the PHI Batteries and Void the Warranty.

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 14 |
4.0 –Installation
4.1 –Installation Options
The PHI 3.8 and PHI 2.9 Batteries can be mounted in practically any orientation (terminals up or on any side), with
no impact to the performance of the PHI Battery. Do not install them upside down, with the terminals facing the
floor.
4.2 –Environmental Considerations
4.2.1 –Charging at Temperatures Below Freezing
It is important to take necessary steps to determine the temperature of the PHI Battery prior to charging
the battery, as the battery may otherwise be adversely impacted.
CAUTION: Do not attempt to charge the PHI Battery below 32° F (0° C). Attempts to charge at
subfreezing temperatures can adversely affect SOH and cycle life and will Void the Warranty. If
the PHI Battery must be charged below 32° F (0° C), the rate of charge must be at no more than
5% of the PHI Battery’s rated capacity (C/20).
4.2.2 –Explosive Gas Precautions
PHI Batteries are not ignition protected. To prevent fire or explosion, do not install this product in locations
that require ignition-protected equipment. This includes any confined space containing vented batteries, or
flammable chemicals such as, natural gas (NG), liquid petroleum gas (LPG) or gasoline (Benzine/Petrol).
Do not install in a confined space with machinery powered by flammable chemicals, or storage tanks,
fittings, or other connections between components of fuel or flammable chemical systems.
PHI Batteries do not vent any harmful gasses and do not require special ventilation or cooling.
4.2.3 –Anti-Corrosion Protection
Anticorrosive compounds or epoxies are occasionally used in harsh or marine climate installations. Please
consult your electrician or qualified installer to determine if this is advisable, and if so, what solution best
suits your application.
CAUTION: Do not combine PHI Batteries with other brands or chemistries. Do not mix PHI
Batteries from different installations, clients or job sites. Either of these combinations will Void
the Warranty.
4.3 –Mounting Hardware
PHI Battery mounting brackets (sold separately) are designed to secure one PHI 3.8 or PHI 2.9 Battery to a load
bearing surface. The brackets can be mounted directly to a wall or can be arranged on strut channels for ease of
positioning (mounting hardware not included). Mounting brackets should be mounted into load bearing beams, studs
or solid materials with appropriate fasteners. A qualified installer should be familiar with accomplishing this with the

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 15 |
appropriate load bearing requirements. SimpliPhi Power is not liable for damage caused by inappropriate installation
mounting of brackets. Refer to Figures 2.0 and 3.0 for PHI Battery and mounting bracket dimensions and weights.
During mechanical testing, individual PHI 3.8 and PHI 2.9 Mounting Brackets were exposed to 200 pounds each of
downward pressure along the bracket’s outer edge. During this test, a deflection of approximately 30 thousandths of
an inch was measured. Bracket sets are designed to hold one PHI 3.8 Module with a weight of 78.24 pounds or one
PHI 2.9 Module with a weight of 61.06 pounds.
4.4 –Dimensions and Weight
Table 2.0 –Specifications: PHI 3.8 Battery & PHI 3.8 Battery w/ Mounting Bracket
PHI 3.8 Battery
PHI 3.8 Battery
w/ Mounting Bracket
Width
13.5’’
13.7” (18” with mounting flanges)
Height
15.5’’ (including 1.5” terminal height)
15.75” (including 1.5” terminal height)
Depth
8”
9”
Weight
78.2 Pounds
86.2 pounds
Figure 2.0 –PHI 3.8 Mounting Bracket Assembly

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 16 |
Table 3.0 –Specifications: PHI 2.9 Battery & PHI 2.9 Battery w/ Mounting Bracket
PHI 2.9 Battery
PHI 2.9 Battery
w/ Mounting Bracket
Width
11.25’’
13.7” (15.5” with mounting flanges)
Height
12.75" (including 1.75” terminal height)
13” (including 1.75” terminal height)
Depth
9.5”
10.5”
Weight
61.1 Pounds
70.1 pounds
Figure 3.0 –PHI 2.9 Mounting Bracket Assembly

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 17 |
4.5 –PHI Battery Connection Terminals
4.5.1 –Batteries with Threaded Studs
The largest PHI Battery sizes (such as the PHI 3.8 and PHI 2.9) are equipped with two 3/8’’ (10 mm)
threaded studs with a lock washer and nut. The red colored high temperature molded insert connection is
for the positive lead. The black colored high temperature insert connection is for the negative lead.
Water Resistant Cable Boots are also included and will be in place when your units arrive. The boots are to
be placed over the cable terminations and will stretch to form a water-resistant seal around the base of the
molded inserts and terminal connections.
CAUTION: Do not attempt to loosen the large brass nut at the base of the terminals; doing so
will damage the PHI battery and Void the Warranty.
4.5.2 –Torque Value for Batteries with Threaded Studs
PHI Batteries with threaded stud terminals have a torque specification of 160 in-lbs. (13.3 ft-lbs.).
Threaded Studs = 3/8” (10mm)
Torque Value = 160 in-lbs
4.5.3 –Batteries with Anderson Connectors
The smallest PHI Battery sizes (such as the PHI 1.4 and PHI 730) are equipped with SB 50 Anderson
connectors utilizing P/N 5900 #6 HD contacts.
•12V connections are YELLOW
•24V connections are RED
To avoid any spark or electrical event when connecting batteries with Anderson Connectors, turn the
accompanying equipment off, connect cables with appropriate battery mating connectors to the equipment,

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 18 |
and then make final connections via connectors to the batteries before turning on the system’s
accompanying equipment.
4.6 –Wiring
CAUTION: All PHI Batteries are designed to serve at fixed voltages and cannot be wired in
series to increase the battery bank’s voltage. Wiring the PHI Batteries in series will result in
damage to the PHI Battery’s protective circuitry and will Void the Warranty. PHI batteries are
designed for parallel wiring only to increase the battery bank’s storage capacity.
4.6.1 –Increasing Storage Capacity via Parallel Wiring
Storage Capacity and total available Amperage is increased incrementally with the number of units wired in
Parallel. For example, two PHI 3.8 kWh-51.2Vnominal (75Ah) Batteries wired in parallel are rated at a
combined 7.6 total kWh, 51.2 Volts DC and 150Ah. Each PHI 3.8 kWh-51.2Vnominal Battery also has a
maximum continuous discharge rate of 37.5 Amps DC and paralleling two of these batteries incrementally
increases the maximum continuous charge and discharge rate. The two paralleled PHI 3.8 kWh-51.2Vnominal
batteries have a combined maximum continuous charge and discharge rate of 75 Amps DC (2 × 37.5ADC).
4.6.2 –Parallel Wiring Batteries with Threaded Studs using Battery Cables
PHI Batteries are paralleled by wiring from individual PHI Batteries to DC busbars or plates, which may be
located in a DC combiner box or the inverter’s power panel.
Figure 4.0 –Two PHI Batteries in Parallel

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 19 |
Although lead acid batteries are typically wired using battery-to-battery interconnecting cables, SimpliPhi
asks that PHI Batteries NOT be wired in this way.
All wire lengths from each PHI Battery to common busbars or plates should be identical in length and gauge
in order to balance the load across (all) PHI Batteries in the installation.
CAUTION: Identical wire lengths and identical wire gauges from each PHI Battery in a PHI
Battery bank is a critical feature of parallel power storage systems that must be adhered to
throughout all parallel wiring instructions. Failure to properly wire the PHI Batteries in parallel
will Void the Warranty.
Figure 5.0 depicts four PHI Batteries wired in Parallel. This configuration requires 8 identical lengths of
identical gauge copper wire.
Figure 5.0 - Four PHI Batteries in Parallel

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
| 20 |
Helpful Tips:
•Power cabling for paralleling PHI Batteries is not included. All wire should be an appropriate gauge
and construction to handle the loads that will be placed upon it. Heavy gauge, high strand copper
wire is the industry standard due to its stability, efficiency and overall quality.
•Each PHI Battery’s individual wire runs are typically sized at 4 AWG, according to the 80A built-in
breaker.
oConductor ampacity can be determined using National Electrical Code tables.
oDepending on the electrical code of the local Authority Having Jurisdiction, the PHI
Battery leads’ gauge may need to be sized according to the built-in breaker or according to
the PHI Battery’s surge rating.
•Arctic Ultraflex Blue® cables from Polarwire are flexible and easy to work with:
https://store.polarwire.com/custom-cables/.
oArctic Ultraflex Blue cable ampacity ratings are linked here:
http://www.polarwire.com/properties-specs.pdf.
•Battery cables can be custom ordered to include the 3/8” lugs that fit on the PHI Battery’s threaded
studs.
•Determine the cable length for the PHI Battery terminal farthest from the common busbar or plate
first.
•Additional cabling or slack that remains with the shorter distance runs can be coiled
and secured with Zip Ties.
•Wire length should be kept as short as practical.
•Positive wire runs should be separated from negative wire runs in separate conduit.
•Energy supplied by the PHI Battery is reduced as electrical current moves through wire. For lengths
of battery cable greater than ~10 feet (3 meters), ensure that the voltage drop is no greater than 3%.
•To take full advantage of the combined PHI Battery bank’s surge rating, the DC busbars or plates
that the individual PHI Batteries are wired to should be rated to match the PHI Battery bank’s total
surge rating.
•MidNite Solar produces the MNLB Lithium Battery Combiner (rated at 250 Amps MAX) and the
MNBCB 1000/50 Battery Combiner (rated at 1,000 Amps MAX)
CAUTION: Do not reverse polarity. Positive battery cables must connect to the PHI Battery’s
Positive terminal studs and to Positive DC busbars or plates. Negative battery cables must
connect to the PHI Battery’s Negative terminal studs and to Negative DC busbars or plates.
Reversing polarity will Void the Warranty.