SOLIS S6-EH1P3.8K-H-US User manual

User Manual
High Voltage Hybrid Single Phase
Residential Energy Storage Inverter
Version 4.3 Release Date: 12/2023
Applicable Models:
S6-EH1P3.8K-H-US
S6-EH1P5K-H-US
S6-EH1P7.6K-H-S-US
S6-EH1P7.6K-H-US
S6-EH1P9.9K-H-US
S6-EH1P10K-H-US
S6-EH1P11.4K-H-US

● Product specifications are subject to change without notice. Every attempt has been made
to make this document complete, accurate and up-to-date. Individuals reviewing this
document and installers or service personnel are cautioned, however, that Solis
reserves the right to make changes without notice and shall not be responsible for any
damages, including indirect, incidental or consequential damages caused by reliance
on the material presented including, but not limited to, omissions, typographical errors,
arithmetical errors or listing errors in the material provided in this document.
● Solis accepts no liability for customers' failure to comply with the
instructions for correct installation and will not be held responsible for upstream or
downstream systems Solis equipment has supplied.
● The customer is fully liable for any modifications made to the system; therefore,
any hardware or software modification, manipulation, or alteration not expressly
approved by the manufacturer shall result in the immediate cancellation of the warranty.
● Given the countless possible system configurations and installation environments, it is
essential to verify adherence to the following:
● There is sufficient space suitable for housing the equipment.
● Airborne noise produced depending on the environment.
● Potential flammability hazards.
● Solis will not be held liable for defects or malfunctions arising from:
● Improper use of the equipment.
● Deterioration resulting from transportation or particular environmental conditions.
● Performing maintenance incorrectly or not at all.
● Tampering or unsafe repairs.
● Use or installation by unqualified persons.
● This product contains lethal voltages and should be installed by qualified electrical or
service personnel having experience with lethal voltages.
Important Notes

8 Appendix
7 Specifications
6 Troubleshooting
5 Commissioning
4 Installation
3 Overview
2 Safety
1 Introduction
Table of Contents

1
1
4
1.1 Inverter Description......................................................................................
1.2 Included Components .................................................................................
2. Safety & Warning...................................................................................................................
3. Overview................................................................................................................................
Table of Contents
1.3 Tools Required for Installation ......................................................................
1.4 Inverter Storage ..........................................................................................
2.1 Safety ........................................................................................................
2.2 General Safety Instructions .........................................................................
2.3 Notice for Use.............................................................................................
2.4 Notice for Disposal ......................................................................................
2.5 Protection Circuitry and Controls...................................................................
3.1 LED Indicator Lights.....................................................................................
3.2 Inverter Wire Box and Connection Points......................................................
4. Operating Modes.......................................................................................................
4.1 PV-Only.....................................................................................................
4.2 Energy Storage.........................................................................................
5.3 Mounting the Inverter.................................................................................
5.4 Inverter Wiring Overview............................................................................
5.5 External Grounding....................................................................................
5.6 PV Cable Installation..................................................................................
5.7 Rapid Shutdown........................................................................................
5.8 Battery Cable Installation............................................................................
5.9 AC Wiring..................................................................................................
5.10 Inverter Communication...........................................................................
4
5
6
6
6
8
8
8
9
9
10
11
12
23
26
27
28
29
31
32
38
1. Introduction......................................................................................................
11
5.1 Selecting a Location to Install the Inverter.....................................................
5.2 Product Handling.......................................................................................
20
22
5. Installation................................................................................................................
20
6. Commissioning.................................................................................................................
6.1 Pre-Commissioning Steps.......................................................................
6.2 Commissioning Procedure.......................................................................
7. Troubleshooting...............................................................................................................
8. Specifications...................................................................................................................
9. Appendix..........................................................................................................................
8.1 Temperature Derating Curve....................................................................
8.2 Inverter Internal Toplogy..........................................................................
43
43
43
51
55
67
67
67
68
8.3 UL Certification......................................................................................

1.1 Inverter Description
The Solis S6 Hybrid series is designed for residential applications. The inverter can work
with high-voltage lithium ion batteries to maximize self-consumption and provide backup
power if the grid fails and there is not enough PV power to cover load demand.
This inverter can operate in both on-grid and off-grid applications.
The S6 hybrid series consists of the following inverter models: 3.8kW, 5kW, 7.6kW, 10kW,
and 11.4kW. The 3.8-5K models are of a similar but different hardware platform than the
7.6-11.4K models. The inverter comes with an integrated rapid shutdown transmitter.
Figure 1.1
Frontal View
Figure 1.2
Bottom View (Wire Box)
1
1. Introduction
DC Disconnect Switch AC Bypass Switch
Rapid Shutdown Initiation Switch
Solis Data Logger (sold separately)
LED Status Indicators
1 ½ in. Knockout
for AC Grid
1 ½ in. Knockout for AC Backup
Data Logger (USB) 1 in. Knockout for DC Battery
1 in. Knockout
for DC PV
½ in. Knockout
for Comm Cables
½ in. Knockout for External Rapid Shutdown Switch
½ in. Knockout
for Comm Cables
Bluetooth
Antenna

Figure 1.3 Right Side View
1. Introduction
Figure 1.4 Left Side View
2
Mounting Bracket Hook
DC Disconnect Switch
Carrying Handle
Solis Data Logger (sold separately)
1 in. Knockout for DC PV
Mounting Bracket Hook
AC Bypass Switch
Carrying Handle
Solis Data Logger (sold separately)
1 ½ in. Knockout for AC Grid
Rapid Shutdown Initiation Switch

Figure 1.3 Back View
1. Introduction
Figure 1.4 Top View
3
1 ½ in. Knockout for AC Grid or Backup
Heat Sink for Convective Cooling
1 in. Knockout for DC Battery or PV

4
1.2 Components Included with the Inverter
1. Introduction
Inverter x1 Inverter Mounting Bracket x1 Stabilizing Set Screws x4
If any of these items are missing, please contact your local Solis distributor or the Solis service team.
1.3 Tools Required for Inverter Installation
Technician Screwdriver Torqx T20 Screwdriver Wire Strippers
12AWG to 6AWG
Wire Strippers
20AWG to 10AWG
Drill and Impact Driver
Multimeter (AC/DC amps)
Channel Locks
Smartphone
(for commissioning)
Torque Wrench Screwdriver
RJ45 Crimping Tool
(for parallel inverter
comms only)
Ratcheting Crimper
Bubble Level
External Energy Meter x1
1/2 inch Cable Glands x3 Current Transformers x2 Terminal Pins x10 Terminal Pins x4
Torqx T20 Tool x1 RJ45 connector x3 Data loger x1
(Optional)
Parallel communication
Cable x1(2m)
Install spare screws
on the upper cover x2
Back mounting plate
mounting screws x4
If anything is missing, please contact your local Solis distributor.

● Use the original box to repackage the inverter, seal with adhesive tape with the desiccant
inside the box.
● Store the inverter in a clean and dry place, free of dust and dirt. The storage temperature
must be between -40~158°F and humidity should be between 0 to 100%, non-condensing.
● Do not stack more than two (2) inverters high on a single pallet. Do not stack more than
2 pallets high.
● Keep the box(es) away from corrosive materials to avoid damage to the inverter enclosure.
● Inspect the packaging regularly. If packaging is damaged (wet, pest damages, etc.),
repackage the inverter immediately.
● Store inverters on a flat, hard surface -- not inclined or upside down.
● Do not remove the desiccant packet that is included with the inverter. It is included to
ensure that any residual moisture is absorbed quickly.
● Restarting after a long period of non-use requires the equipment be inspected and, in some
cases, the removal of oxidation and dust that has settled inside the equipment will be
required.
● Perform an annual visual inspection of the inverter box for signs of damage
● If the inverter has been removed from the box and then replaced, put desiccant packets in the
inverter wire box to ensure the internal components stay dry
● Do not store the inverter outside or in a place that does not have environmental controls.
1.4 Inverter Storage
DO NOT STACK
MORE THAN HIGH
2
1. Introduction
5
● If the inverter is not installed immediately, please abide by the storage instructions and
environmental conditions listed below.

6
2. Safety & Warning
2.1 Safety
The following types of safety instructions and general information appear in this document
as described below:
CAUTION
“Caution” indicates a hazardous situation which if not avoided, could result
in minor or moderate injury.
WARNING
“Warning” indicates a hazardous situation which if not avoided, could result
in death or serious injury.
DANGER
“Danger” indicates a hazardous situation which if not avoided, will result in
death or serious injury.
NOTE
“Note” provides tips that are valuable for the optimal operation of your
product.
2.2 General Safety Instructions
WARNING
Electrical installations must be done in accordance with local and national
electrical safety standards.
WARNING
Do not connect PV array positive (+) or negative (-) to ground, doing so could
cause serious damage to the inverter.
WARNING
Only devices in compliance with SELV (EN 69050) may be connected to the
RS485 and USB interfaces.
WARNING
Do not touch any internal parts until 5 minutes after disconnection
from the utility grid, PV array, and battery.
WARNING: Risk of fire
Despite careful construction, electrical devices can cause fires.
Do not install the inverter in an area containing flammable materials
or gases.
Do not install the inverter in a potentially explosive atmosphere.

7
CAUTION
The PV conductors are energized with high voltage DC when the PV
modules are exposed to sunlight.
CAUTION
The surface temperature of the inverter can reach up to 75 (167°F).
To avoid risk of burns, do not touch the surface of the inverter while it is
operating. The inverter must be installed out of direct sunlight exposure.
WARNING
To reduce the risk of fire, over-current protective devices (OCPD) are
required for all circuits connected to the inverter.
The DC OCPD shall be installed per local requirements. All photovoltaic
source and output circuit conductors shall have isolators that comply with
the NEC Article 690, Part II.
All Solis single phase inverters feature an integrated DC disconnect switch.
CAUTION
Risk of electric shock, do not remove the cover. There are no serviceable
parts inside, refer servicing to qualified and accredited service technicians.
NOTE
PV modules used with inverter must have an IEC 61730 Class A rating.
WARNING
Operations must be accomplished by a licensed electrician or a
person authorized by Solis.
WARNING
Installer must wear personal protective equipment during the
entire installation process in case of electrical hazards.
WARNING
The AC Backup Port of the inverter cannot be connected to the grid.
WARNING
Please refer to the product manual of the battery before installation
and configuration to the inverter.
2. Safety & Warning
Systems using this product shall be designed and built in accordance
with the NEC & local electrical codes & standards.

8
2.3 Notice for Use
The inverter has been constructed according to the applicable safety and technical
guidelines. Use the inverter in installations that meet the following specifications only:
1. Permanent installation is required.
2. The electrical installation must be compliant with all local and national regulations &
standards.
3. The inverter must be installed according to the instructions stated in this manual.
4. The inverter must be installed according to the inverter technical specifications.
2.4 Notice for Disposal
This product shall not be disposed of with household waste.
It must be segregated and brought to an appropriate disposal facility
to ensure proper recycling.
This it to be done in order to avoid negative impacts on the environment
and human health.
Local waste management rules shall be observed and respected.
2. Safety & Warning
2.5 Protection Circuitry and Controls
To meet relevant codes and standards, the Solis U.S. single phase inverter line is
equipped with protective circuitry and controls. These include Arc Fault Circuit Interrupter
(AFCI) and Anti-Islanding Protection.
Arc Fault Circuit Interrupter AFCI:
Edition 2011 of the National Electrical Code®, Section 690.11, requires that all PV plants
attached to a building are fitted with a means of detecting and interrupting serial electric
arcs in the PV wiring and array. An electric arc with a power of 300W or greater must be
interrupted by the AFCI in the time specified by UL 1699B. After five arc fault detections
in 24 hours, an AFCI-induced shutdown will be triggered. If this event occurs, the inverter
must be manually reset. After clearing the source of the fault, the inverter can be powered
back on and allowed to resume normal operation.
Anti-Islanding Protection:
Anti-Islanding is a condition where the inverter cease to produce power when the grid
is not present. Circuitry, along with firmware, has been designed to determine if the grid is
present by adjusting the output frequency of the inverter. In the case of a 60Hz resonant
system where the inverter is partially isolated from the grid, the inverter programming can
detect if there is a resonant condition or if the grid is actually present. It can also
differentiate between inverters operating in parallel and the grid.

9
3. Overview
3.1 LED Indicator Lights
There are five indicator lights on the the Solis S6-EH1P(3.8-11.4)K-H-US Series Inverter: Battery,
Inverter, Wi-Fi, RS485 and Bluetooth. These lights indicate the working status of the inverter.
The inverter creates a Bluetooth signal which is what the smart phone connects to so that the inverter
interface page can be accessed. This is how commissioning and settings changes are performed.
Battery
Power
WiFi
Bluetooth
RS485
NOTE:
Battery/WiFi/Ethernet/Bluetooth indicators will automatically turn off after
1 minute. The Power indicator will remain on with lower brightness. Short
press the Power indicator can wake up all indicators.
Light Status Description
Blue
Flashing every 3s
Blue
Flashing every 1.5s
Blue Solid ON
OFF
Blue Solid ON
Yellow Solid ON
RedSolid ON or
flashing every 3s
OFF
OFF
OFF
Battery discharging.
Battery charging.
Idle.
No Battery or not working.
Normally Operating.
Warning.
Alarm.
COM Port is using.
RS485 Port is using.
Bluetooth Port is using.
COM Port is not used.
RS485 Port is not used.
Bluetooth Port is not used.
Blue Solid ON
Blue Solid ON
Blue Solid ON
Power
WiFi
RS485
Bluetooth
Battery
Turning On the LED Indicator Lights
After a few minutes, the LED indicator lights will turn off to conserve power.
To turn the lights back on, short-press the Inverter LED light.
Alarm State
When the inverter has an alarm, the Inverter LED light turns red and
starts flashing. It is recommended to connect to the inverter with the
Bluetooth tool. Then you can determine what the alarm code is.
OFF No Battery or not working.
NOTE:
Long press the Power button for 5 seconds to reset the bluetooth connection
passwords. If the reset is successful, the Power button will be flashing in
Blue color and in 0.5s interval for 3s. If the reset is failed, the Power button
will be flashing in Yellow color and in 0.5s interval for 3s.
If the reset is not successful, please contact the after-sales engineer for
assistance in resetting the password.

3.2 Inverter Wire Box and Connection Points
Name Description
2. PV
3. Battery
1. DC Switch
7. Bluetooth Antenna
4. Solis Logger Port
5. AC-Backup
6. AC-Grid
8. COM1/COM2
10. Rapid Shutdown Switch
11. AC Bypass Switch
Conduit and PV conductors should be connected here
Conduit for battery conductors should be connected here
This is the DC disconnect switch for the inverter
Turns off the internal transmitter which initiates module level rapid shutdown
Solis USB data loggers are to be connected here
Conduit for AC conductors to backup loads panel should be connected here
Conduit for AC conductors to the main service panel should be connected here
Extends the range of the inverter Bluetooth signal (for system commissioning)
RS 485 and CAN communication cables should use these knockouts and terminals
Allows the inverter to pass power through from the grid (main service panel) to the
backup loads directly in the event of an inverter failure.
3. Overview
5. AC-Backup
3. Battery
9. External RSD An external RSD switch can be added and connected to the inverter here
6. AC Grid
4.Logger
7.Bluetooth Antenna
2. PV
8. COM 9.External RSD Switch
1.DC Switch
10.Rapid Shutdown
Initiation Switch
11. AC Bypass
Switch
4. Solis Logger Port
6. AC Grid
5. AC-Backup
3. Battery
2. PV
8. COM 9. External RSD
10

11
4. Operating Modes
4.1.1 Grid-Tie PV String Inverter
The inverter offers the ability to manage export power. During the system commissioning process,
export power control can be enabled. An export power limitation can then be set to the desired kW
value. The inverter will then regulate how much power gets sold back to the utility company.
4.1 PV-Only
The S6 hybrid can function as a grid-tie PV string inverter with no battery. It will use PV power to
supply the home loads while the grid is active. The inverter does have export power control so it can
be programmed to sell the excess power back to the grid. Whenever there is not enough PV power
to cover the load demand, power will be imported from the utility to cover the deficit. If the grid fails
or is inactive, the inverter will not be able to supply any PV power to the home loads.
Figure 4.4 Solis S6 hybrid as a grid-tie PV string inverter
PV
Home Grid
Figure 4.4 Solis S6 hybrid with export power control enabled
PV
Home Grid
Grid Active Grid Inactive
4.1.2 Export Power Control
The S6 hybrid can function as a grid-tie PV string inverter with no battery. It will use PV power to
supply the home loads while the grid is active. The inverter does have export power control so it can
be programmed to sell the excess power back to the grid. Whenever there is not enough PV power
to cover the load demand, power will be imported from the utility to cover the deficit. If the grid fails
or is inactive, the inverter will not be able to supply any PV power to the home loads.
PV
Home Grid
Utility Meter
Each Solis S6 hybrid comes with an energy meter, which gets installed externally to the inverter.
The energy meter uses two CTs, which measure the power being consumed by the home. The hybrid
uses the data from this meter to determine whether or not it needs to curtail the PV power to meet the
export power limitation. Export power control can be enabled with or without a battery installed.
Energy Meter
S6 Hybrid
S6 Hybrid
S6 Hybrid
Zero-Net Export
The inverter can be set to not export any power to the utility. This does not end up being zero export
as there is some power that leaks back to the utility each time there is a change in load demand.
However, the net import/export will be near zero kWh each day when programmed for zero export.

12
4. Installation
4.2.1 Overview of Energy Storage Modes
If the primary purpose of the energy storage system is to store as much of the PV power as possible
so that it can be used later to offset the usage of grid power, this is known as energy arbitrage.
Time-of-use, self-consumption, and peak-shaving are all examples of Typically, energy arbitrage.
the battery will cycle daily as it charges with PV and discharges to cover home load demand.
4.2 Energy Storage
The S6 hybrid is capable of providing AC power to home loads using PV and battery power in the
event of a grid failure. This is known as backup power. The amount of backup power that each S6
hybrid model can provide is equal to the amount of on-grid power that it can provide. For example,
an 11.4K model can provide up to 11.4K of continuous backup power.
Figure 4.4 Backup power with Solis S6 hybrid
PV
Home
Battery
Grid
Figure 4.4 Energy arbitrage with Solis S6 hybrid
PV
Home
Battery
Grid
S6 Hybrid
S6 Hybrid

4. Installation
Light Loads Heavy Loads
Partial-home backup systems should only have the light loads backed up. This ensures that the
battery does not deplete too quickly, allowing the PV power generated to balance the load demand.
Light loads include lights, TVs, computers, routers, and most things that can plug into an outlet.
systems can have all home loads backed up, including the heavy load .Whole-home backup s
However, enough PV, battery, and (or) generator power must be available to meet the high current
demand of the heavy loads. It is recommended to oversize the system for the needs of the owner.
4.2.2 Backup Power
This inverter is capable of providing AC power to home loads using PV and battery power in the
event of a grid failure. When the inverter senses that the grid power has been lost, it automatically
opens the relay connecting itself to the grid. It keeps the relay closed for the backup side, allowing it
to supply AC power to the home loads as long as power is available. The loads that are to be backed
up will need to be located in a load center that is electrically isolated from the utility point-of-
-connection to ensure that the anti-islanding requirement remains unviolated. The inverter will
automatically reconnect to the grid once it senses that power is restored.
Figure 4.4 Off-grid power with Solis S6 hybrid
PV
Off-Grid Home
Battery
No Grid
The S6 hybrid can also operate in an entirely remote system where there is no grid present at all.
This is called off-grid and it is very similar to backup in that the inverter will supply AC power to the
loads with PV and battery power only. However, backup mode is only for grid-connected systems.
The inverter is not able to provide off-grid/backup power with only PV, a battery is required.
13
S6 Hybrid
NOTE:
IG follow is turned off by default, and the switching time can reach 10ms when
turned on.
Step: Tool-local configuration - connect with Bluetooth - select the inverter -
Advanced setting - Special Functions Setting 1- lg follow - enable

4. Installation
The homeowner will need to be consulted to understand why they are installing a battery. It should
also be determined how much power is consumed, how much power the PV will generate, how
much storage power there will be, and which loads are to be backed up in the event of a power
outage (grid failure). If the homeowner says that they want mostly everything backed up, this is
considered If they are willing to live with just a few key things such as the whole-home backup.
fridge, lights, and outlets, this is . Examples are shown in the pages ahead. partial-home backup
.
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Self-Use
Self-Use is the default mode for this
inverter. The system will first supply the
home loads. Any excess PV power gets
stored in the battery. If the battery is fully
charged, the remaining power can be
exported if the system is configured to
allow it. Self-consumption is optimal
for those who want independence from
the grid and to be as self-sufficient as
possible. Adequate PV and storage
should be installed for this mode to
be most effective.
Peak-Shaving
Peak-shaving Mode limits the power of
grid and the battery discharging.
With this working mode, the inverter will
discharge the battery only when the power
consumption from the grid will be over a
certain value, set by the user.
The discharge of the battery will be stop
any time the power absorption from grid
will be lower than the value set.
This mode is the best choice for
those who want to stabilize
the amount of electricity
from the grid and save
electricity costs.
4.2.3 Energy Arbitrage
The S6 hybrid inverter has multiple operating modes which can be programmed so that the
performance of the system is tailored to the specific needs of each individual system owner.
The backup power function of the inverter can be enabled or disabled independently of the
energy arbitrage modes. The inverter provides three operating modes for energy arbitrage:
(1) Self-Use (2) Peak-Shaving (3) Feed-in-Priority
For a whole-home backup system, the average daily power consumed should be less than
or equal to the average daily PV power produced over the span of a year. Otherwise, it is suggested
to add additional PV or exercise load control (load shedding).

15
4. Installation
This mode can be thought of as export
priority mode. The system will first supply
the home loads with PV power and then
it will seek to export the excess PV power,
up to the set limit. Once the limit is
reached, the remaining power will be
stored in the battery. If the battery is fully
charged, the PV will at that point be
curtailed. This mode is for those who
receive an equal rate for power exported
or who have a much higher ratio of PV
power generated to power consumed.
Feed-in-Priority
4.2.4 Off-Grid
Table 4.4 AC-coupled Solis S6 hybrid system
DC
AC
The logic for Off-Grid mode is the
same as Self-Use mode. However,
there is no export power control and
a generator is often used in place of
the grid to supplement the PV and
batteries. When the generator is
turned on by the generator, the
PV production is temporarily
suspended as to not backfeed the
generator. The inverter will use
generator power to supply loads
and recharge the battery.
Generator
(recommended)
Off-Grid Home
S6 Hybrid
Battery
PV
There is a dedicated mode specifically for off-grid remote systems which are not
electrically connected to the grid at all, such as a cabin in the woods. This mode is
not to be confused with backup mode,which occurs only for grid-connected systems.

16
4. Installation
4.2.5 AC-Coupling
The Solis S6 hybrid can be AC-coupled or DC-coupled to a home. AC-coupled means that the
energy storage is connected to the AC-side of the system. Typically, the battery and inverter pair
are connected in parallel with an existing PV system. The battery will charge with PV power that
gets converted from DC, to AC, and then back to DC again. When AC-coupling with the S6 hybrid,
new PV can either be added or not be added to the S6 hybrid, it is up to the system designer. The
hybrid would just need to be installed with a compatible high-voltage battery and then be
connected to the home load center in parallel with the existing PV system.
.
Table 4.4 AC-coupled Solis S6 hybrid system
DC
AC
AC-Coupling for Energy Arbitrage (No Backup Power)
The inverter with a compatible battery can be installed on a home with or without an existing PV
system. The system can be programmed to charge during the day with AC power from the PV and
then during peak hours or whenever there is not enough PV, the battery will discharge to cover the
load demand and reduce the amount of power imported from the utility. In this case, the backup and
PV functions of the inverter would not be used. Additional PV can be added to the home and then
connected to the S6 hybrid inverter, but it is not required for this type of AC-coupled application.
Figure 4.17 AC-coupling with an existing PV system and no backup power
AC
DC L1
L2
N
Main Service Panel
Main Breaker
AC
Grid
AC-GridAC-Grid
L1
L2
N
AC
DC
MPPT-2MPPT-2MPPT-3MPPT-3MPPT-4MPPT-4 MPPT-1MPPT-1
AC-GridAC-Grid
AC-BackupAC-Backup
L1
L2
N
BATTBATT
Battery
EV Charger
COMCOM
CAN
Non Backup LoadsNon Backup Loads
Ulity
Meter
Exisng PV System
S6-EH1P(3.8-11.4)K-H-US
String-1
String-2
String-3
String-4
----
--
--
Addional PV Oponal