MidNite Solar Hawke's Bay User manual

Hawke’s Bay Manual
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MidNite Solar Hawke’s Bay
Owner’s Manual
This entire manual is printed without color but is available for download—with many of the
diagrams available in color—on our website at midnitesolar.com.

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Table of Contents
Introduction ...............................................................................................................................3
Safety Instructions................................................................................................................. 4
How To KILL Your Batteries.................................................................................................... 7
Wiring Requirements............................................................................................................. 7
Installation.......................................................................................................................... 11
Hawke’s Bay Connections.................................................................................................... 12
Options Board............................................................................................................................ 13
Bypass Switch ............................................................................................................................ 13
Arc Fault..................................................................................................................................... 14
Ground Fault.............................................................................................................................. 15
Rapid Shutdown System............................................................................................................ 15
Battery Temperature Sensor..................................................................................................... 16
Whiz Bang Jr .............................................................................................................................. 17
Battery Sense Circuit ................................................................................................................. 18
Hawke’s Bay Wiring............................................................................................................. 18
Energizing the Hawke’s Bay ................................................................................................. 19
Operation............................................................................................................................ 20
System and Device Naming....................................................................................................... 20
Battery Charge Stages ............................................................................................................... 21
Advanced Settings and Concepts ......................................................................................... 23
Hawke’s Bay Programming .................................................................................................. 24
Auxiliary Modes .................................................................................................................. 28
Firmware Update ................................................................................................................ 30
Troubleshooting.................................................................................................................. 31
Technical Drawings & Specifications ................................................................................... 34
Warranty............................................................................................................................. 37
PV Voltage Correction Factors ............................................................................................. 39

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INTRODUCTION
The Hawke’s Bay charge controller regulates a DC input source from solar to properly charge a
48VDC battery bank. The Hawke’s Bay can be installed stand-alone or as a multi-unit,
networked installation with any MidNite product using our latest graphical interface, the
MNGP2.
Standard features include:
•Two models available: 90A or 120A of charging current
•Installed Options Board for:
oArc Fault Protection, UL1699B
oGround Fault Protection, NEC2020
oSunSpec compliant Rapid Shutdown
Transmitter
•Compatible with flooded lead-acid, sealed,
AGM, Gel, NiFe, Lithium, and virtually any
other battery chemistry
•Min/Max MPPT range : 185V to 550VDC
•Two AUX circuits for remote triggering
•Dedicated Whiz Bang Jr input terminal
•Remote Battery Voltage Sense Circuit
•Operating voltage: 29V to 65VDC
•Battery Temperature Sensor
•CANBUS communications
•Data logging for 365 days
•Voice annunciations
•48VDC battery bank
•Bluetooth
•ETL Listed

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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR THE MIDNITE SOLAR HAWKE’S
BAY MPPT CHARGE CONTROLLER THAT SHALL BE FOLLOWED DURING INSTALLATION AND
OPERATION.
If you do not fully understand any of the concepts, terminology, or hazards outlined in these
instructions, please refer installation to a qualified dealer, electrician, or installer. These
instructions are not meant to be a complete explanation of a renewable energy system. Before
using the Hawke’s Bay, read all instructions and cautionary markings. The installation
instructions are for use by qualified personnel only. Do not perform any installation other than
that specified in this manual unless you are qualified to do so. Incorrect installation may result
in a risk of electric shock, fire, or other safety hazard.
Safety Symbols
The following safety symbols have been placed throughout this manual to indicate dangerous
and important safety instructions.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
WARNING!
CAUTION indicates conditions or practices that could result in damage to
the unit or other equipment.
CAUTION!
INFO: Indicates information that emphasizes or supplements important
points of the main text.

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SAFETY PRECAUTIONS
•Over-current protection for the DC wiring is not provided as an integral part of this charge
controller. Over-current protection of the DC wiring must be provided as part of the
system installation.
•System grounding is the responsibility of the system installer and must comply with local
and national electrical codes and standards.
•This product is designed for indoor/compartment installation. It must not be exposed to
rain, snow, moisture, or liquids of any type.
•Listed or labeled equipment shall be installed and used in accordance with any instructions
included in the listing or labeling.
•All electrical work must be performed in accordance with local and national electrical codes.
•The DC negative conductors are not connected (bonded) to the charge controller’s chassis.
•Use Class 1 wiring methods for field wiring connections to terminals of a Class 2 circuit.
oHawke’s Bay Class 2 terminals: WBJr, AUX, Current Transformers, BTS, CANBUS.
•Use insulated tools to reduce the chance of electrical shock or accidental short circuits.
•Torque all wiring and cable connections to the required torque values.
•Use only copper wires with a minimum temperature rating of 90°C.
•There are no user-serviceable parts contained in the Hawke’s Bay.
•Always verify proper wiring prior to energizing the Hawke’s Bay.
•Battery cables should be no less than #2 AWG.
•Properly mount the Hawke’s Bay.
BATTERY SAFETY
•Wear eye protection and avoid touching your eyes and face when working with batteries to
keep any fluid/corrosion on the battery from contact with eyes and skin. Have plenty of
fresh water and soap nearby and thoroughly wash in case battery acid contacts skin,
clothing, or eyes. In the event of exposure to the eyes, flood them for at least 15 minutes
with running water and seek immediate medical attention. Baking soda neutralizes lead
acid battery electrolyte and vinegar neutralizes spilled NiCad and NiFe battery electrolyte;
depending on your battery type, keep a supply on hand near the batteries.
•Read and follow the battery manufacturer’s safety precautions before installing the inverter
and batteries. Always verify proper polarity and voltage before connecting the batteries to
the Hawke’s Bay. Once the batteries are connected, ensure the maintenance and charging
requirements (i.e., charge voltage and charge rate) provided by the battery manufacturer
are followed to extend the life of the batteries and to prevent damage to the batteries
while charging.

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•The battery bank should be installed in a clean, dry, ventilated environment that is
protected from high and low temperatures. If installed in a vehicle/boat, the batteries must
be mounted upright (if using liquid batteries) and securely fastened. The location must be
fully accessible and protected from exposure to heat producing devices, and away from any
fuel tanks.
•Batteries can produce explosive gasses, so install batteries in a well-ventilated area. For
compartment or enclosure installations, always vent batteries from the highest point to the
outside. Design the battery enclosure to prevent accumulation and concentration of
hydrogen gas in pockets at the top of the compartment.
•Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing
maintenance on the batteries and inverter. A battery can produce a short-circuit current
high enough to weld metal jewelry, causing severe burns.
•Use insulated tools and be very careful when working around batteries, they can produce
extremely high currents if short-circuited (e.g., dropping a metal tool across the battery
terminal), which could cause a fire or explosion.
•To prevent a spark at the battery and to reduce the chance of explosion, turn off (open) the
DC battery breaker, install/connect the positive DC cable to the breaker, then connect the
positive DC cable to the battery bank. With the DC breaker off/open, connect the negative
DC cable to the battery bank and the Hawke’s Bay.
•Never work alone. Always have someone within the range of your voice or close enough to
come to your aid when working around batteries.
•Never use old or untested batteries. Check each battery’s label for age, type, and date code
to ensure all batteries are identical.
•Batteries are sensitive to changes in temperature. Install batteries in a stable environment.
•Provide at least one inch of air space between batteries to provide optimum cooling.
•Use proper lifting techniques when working with batteries.
•Never smoke or allow a spark near batteries.
•Never charge a frozen battery.
STANDARDS
The MidNite Solar Hawke’s Bay charge controller conforms to UL 1741, Safety for Inverters,
Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy
Resources, UL 1741:2010 Ed.2+R:15Feb2018; CSA C22.2#107.1:2016 Ed.4.

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HOW TO KILL YOUR BATTERIES
Batteries are delicate and require proper attention, especially when off-grid. Think of your
batteries and solar equipment as a small nuclear power plant, hydro dam, or natural gas-fired
power plant. Just like any of those, your system needs DAILY attention to ensure it is performing
correctly and safely. We recommend the use of an independent battery monitor/alarm if you
have an expensive battery bank. Below is a list of some of the most common ways we have
seen people kill their battery bank.
•Using more than three parallel strings and not using common bus bars. With lead-acid
batteries, when you use more than three strings, it is very hard to properly charge the
middle strings. The only safe way to do this is to wire each string with equal length cables
to a common bus bar. Connect inverter cables to the farthest points on the busbars.
•Not watching to verify the Absorb or EQ times are set properly and that the equipment
actually charges for that period of time. Some equipment will have settings like “End Amps”
that can terminate Absorb early and, if set up wrong, can damage a battery.
•Not using ALL EQUAL LENGTH interconnect cables on each string. It is important that ALL
strings be wired EXACTLY the same. Any variance in resistance on one string versus another
will cause an imbalance and the batteries will suffer a shortened lifespan.
•Trusting a State of Charge (SOC) meter, which can lose calibration over time and give you
false readings. You need to verify specific gravity and or verify the charge voltage is being
met. Never fully rely on the SOC %; it is just a good, quick reference.
•Routinely using more than 50% of the capacity of the lead acid battery. Using more than
half the battery capacity drastically shortens the batteries life; occasionally is fine, but daily
will kill lead acid batteries in months.
•Not leaving ample space between cells for cooling. We recommend at least one inch
between the cells for cooling. Ask the battery manufacturer what they recommend.
•Not having enough charge current to properly charge the size of the battery you have.
Consult the battery manufacturer for the minimum charge current.
•Using tap water or other liquids instead of distilled water in a flooded battery. The minerals
in the tap water will destroy a battery.
•Not verifying the temperature compensation neutral point (typically 25°C) and the milli volts
per degree C per cell (typically -5mV).
•Not verifying you are charging to the voltage supplied by the battery manufacturer.
•Not fully charging your lead acid batteries at least once a week.
•Failing to keep all connections clean.
WIRING REQUIREMENTS
•The NEC (National Electric Code, ANSI/NFPA 70) for the United States and the CEC

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(Canadian Electrical Code) for Canada provide standards for safely wiring residential and
commercial installations. The NEC/CEC lists the requirements for wire size, over-current
protection, and installation methods.
•Do not mix AC and DC wiring in the same panel unless specifically approved/designed for
both AC and DC wiring. Where DC wiring must cross AC or vice-versa, try to make the
wires at the crossing point perpendicular (90 degrees) to one another.
•DC wires to and from the Hawke’s Bay must be protected as required by code. This can be
done by using jacketed wires or by feeding the wires through conduit or a conduit box. The
optional Hawke’s Bay Breaker Box satisfies this requirement.
•Always check for existing electrical, plumbing, or other areas of potential damage prior to
making cuts in structural surfaces or walls.
•Wiring should meet all local codes and standards and be performed by qualified personnel
such as a licensed electrician.
•DC over-current protection must be provided as part of the installation.
•Use only copper wires with a minimum temperature rating of 90°C.
•The equipment ground is marked with this symbol:
DC Wiring
•Minimize the number of connections between the Hawke’s Bay and the battery bank.
Exceptions are the DC breaker —required at the battery to protect the DC wiring—in the
positive line, and a DC shunt—to allow battery charge state monitoring—in the negative
line. Additional connections will contribute to voltage drops, and these extra connection
points may loosen during use.
•All wiring to the battery terminals should be checked monthly for proper torque/tightness.
If you don’t have a torque wrench, ensure all DC terminals are tight and cannot move.
The Hawke’s Bay is designed for indoor installation with adequate ventilation. It
must not be exposed to rain and should be installed out of direct sunlight.
CAUTION!
Ensure all sources of DC power (i.e., batteries, solar, wind, or hydro) are
de-energized (i.e., breakers opened, fuses removed) before proceeding—to prevent
accidental shock.
WARNING!

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•The DC cables/wires must be color coded with colored tape or heat shrink tubing: RED for
positive (+); WHITE for negative (-) if solidly grounded or BLACK if using a GFP breaker; and
GREEN for DC ground.
•Use the correct DC cable and corresponding circuit breaker to achieve maximum efficiency
from the system and reduce fire hazards associated with overheating.
•The DC cables must be fine strand, super flexible, such as Cobra cable (or equivalent) and be
approved for residential wiring per the NEC (THHN for example).
•Do not use the Hawke’s Bay chassis in place of the battery negative connection for
grounding. A reliable return path directly to the battery is required.
•Install a 125A DC breaker between the Hawke’s Bay and the battery bank on the positive
cable. Use #2 AWG battery cables.
•A readily accessible battery disconnect is required and must be located within sight of the
battery system (NEC 480.7).
•Ensure cables have a smooth bend radius and do not become kinked. Follow existing wire
runs where possible.
•Ensure both DC cables pass through the same knockout and conduit to allow the inductive
currents to cancel.
•All wiring to the battery terminals should be checked periodically (once a month) for proper
tightness.
•Limit cable length to 6’ or less from Hawke’s Bay to battery bank.
•The battery bank voltage MUST be 48V!
DC Over-Current Protection
•The NEC requires both over-current protection (UL489 standards) and a disconnect switch.
If a circuit breaker is used as the over-current protection device, it can also be used as the
required DC disconnect. If a fuse is used as an over-current device, a Class-T type or
equivalent is highly recommended. This fuse type is rated for DC operation, can handle high
short-circuit currents, and has a time delay that allows for momentary current surges from
the inverter without opening the fuse. Because the fuse can be energized from both
directions, the NEC requires that it be installed in a manner that the power must be
disconnected on both ends of the fuse before servicing.
Verify correct polarity with a multimeter BEFORE connecting the battery cables to the
Hawke’s Bay.
WARNING!

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•The DC over-current protection device must be installed on the positive DC cable. It must
be correctly sized according to the size of DC cables being used, which means it is required
to open before the cable reaches its maximum current carrying capability.
•DC over-current protection is not included with the Hawke’s Bay and must be provided as
part of the inverter installation. Use a 125A DC breaker.
Grounding
•The negative battery conductor should be solidly bonded to the grounding system at only
one point in the system. The size for the conductor is determined by the size of the largest
phase conductor, per the NEC/CEC.
•Use #6 AWG grounding electrode conductor.
Arc Fault - The NEC requires any PV system DC circuit operating at 80VDC or greater must be
protected by an arc fault (AF) circuit interrupter.
Ground Fault - Since 2008 the NEC requires a DC Ground Fault (GF) Protection device on all
PV systems to indicate when a GF condition exists.
Protecting Wire –Hawke’s Bay Breaker Box (MNHAWKES BAY BB125)
DC wires to and from the Hawke’s Bay must be protected as required by code. This can be
done by using jacketed wires or by feeding the wires through conduit. Midnite offers a breaker
box that includes the necessary DC breakers that allow the PV wires and DC battery cables to be
routed via conduit and connected to the Hawke’s Bay.
PV Array
•The PV array connected to the Hawke’s Bay must be designed to present enough voltage to
operate, yet not enough to damage the unit. The Hawke’s Bay needs a minimum of
240Voc from the PV array; otherwise, the controller will remain in a Resting state on a hot
day. Thus, when you design the PV layout, ensure you wire enough PV modules in series to
present at least 240Voc. Since this is a 600V controller, you will more than likely wire many
modules in series to take advantage of the 600V input. Be mindful of the effects of cold
The Hawke’s Bay may be used in a positive grounded, negative grounded, or ungrounded
installation. For a grounded system, bond either Battery Negative to Ground, or bond
Battery Positive to Ground (but not both at the same time!!).
CAUTION!

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temperatures on PV string voltages. DO NOT PRESENT MORE THAN 600VDC TO THE
CONTROLLER!! The MPPT range of the Hawke’s Bay is 185V – 550VDC. Page 39 shows an
ambient temp chart to help size the PV string voltage.
EXAMPLE - Assume the coldest weather in your locale is -4F. Referencing the chart gives a
factor of 1.18. 600Voc / 1.18 = 508Voc. Thus, wire the PV modules in series so as not to
exceed 508Voc and the MPPT will continue charging down to -4F.
•The PV negative wire from the PV array
must be isolated from ground. Ensure
the PV negative is wired from the array
directly to the PV negative input terminal
in the Hawke’s Bay.
INSTALLATION
Before installing, read the entire installation section to determine how you are going to install
your Hawke’s Bay. The more thoroughly you plan in the beginning, the better your overall
system needs will be met.
The installation begins by selecting a wall. The Hawke’s Bay is indoor rated and should not be
placed outside unless precautions are made to keep rain and moisture off the system.
The NEC requires 30” clear on the wall. The Hawke’s Bay may be located anywhere within this
30”.The NEC also requires 36”free and clear of obstructions in front of the charge controller.
The 36” clear area in front of all electrical panels is to provide a space to fall back into in case of
electrical shock.
NOTE: The optional Hawke’s Bay Breaker Box offers NEC required OCP and DC disconnects but
is NOT a required component. The Hawke’s Bay may be installed without the Breaker Box.
Mounting Location
Install the Hawke’s Bay in a location that meets the following requirements:
•Locate the charge controller as close to the batteries as possible. Long DC wires tend to
lose efficiency and reduce the overall performance of a charge controller. However, the
unit should not be mounted where it will be exposed to gases produced by the batteries.
These gases are corrosive and will damage the Hawke’s Bay; also, if these gases are not
ventilated and if allowed to collect, they could ignite and cause an explosion.
•Ensure the charge controller is accessible after it is mounted. Control buttons are located
on the front of the unit. You will need to access these buttons to program and monitor its
operation.
•The PV negative from the PV array
must be wired directly into the
Hawke’s Bay.
•
Do NOT bond PV negative to ground.
Do NOT exceed 600V IN!
CAUTION!

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•The Hawke’s Bay weighs 23 pounds. The optional Hawke’s Bay Breaker Box weighs 12
pounds. The mounting surface and hardware must be capable of supporting at least twice
the weight of these components.
•Mount at least 2’ from any flammable or combustible fluid or components (i.e., paper,
cloth, plastic, etc.) that may be ignited by heat, sparks, or flames.
•The area must be free from any risk of condensation, water, or any other liquid that can
enter or fall on the Hawke’s Bay.
•Mount vertically on a flat, non-combustible surface.
•Remove knockouts before mounting.
•Plan any conduit runs now.
Mounting –Hawke’s Bay
1. Determine mounting location.
2. Hold Hawke’s Bay to wall, mark bolt holes; set Hawke’s Bay
aside.
3. Install top two ¼” x 2” lag bolts to wall, leaving about ¼”
exposed.
4. Align mounting flange keyhole of Hawke’s Bay (Figure 1) to
the lag bolts, slide Hawke’s Bay down.
5. Install bottom lag bolts.
6. Tighten lag bolts.
HAWKE’S BAY CONNECTIONS (Figure 2)
Terminal Block #1 - Breaker Trip circuits, connect to PV input remote-trip breaker(s). The
Hawke’s Bay will signal the breaker to trip open when the PV input voltage exceeds 600VDC.
Use #22 AWG wire.
CANBUS Receptacles #2 - Connects the Hawke’s Bay to other MidNite CANBUS circuits. Use
standard RJ-45, CAT 5 cable. If this data cable is inside a
conduit that also holds any current-carrying wires, then use
CAT 6 shielded cable. If only using one of the two CANBUS
terminals, then the unused terminal must have a
terminator plug installed.
Battery Temperature Sensor (BTS) Receptacle #3 -
Connect the BTS here. Only one BTS is required on a multi-
Hawke’s Bay system. The Hawke’s Bays will share battery
temperature via CANBUS.
Figure 1
1
Figure 2
2
3
4
5

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Terminal Block #4 - AUX 1 and AUX 2 circuits; Battery Voltage Sense circuit; and Whiz Bang Jr,
current-sense device. Use #22 AWG wire.
Terminal Block #5 - Connect the DC input (PV) wires and the Battery Bank wires here. From
left-to-right: PV+ / PV- / Batt - / Batt+. Accepts up to #2 AWG wire.
Ground Wire Lug (Figure 3) -Use #6 AWG wire for
grounding electrode conductor.
Options Board (Figures 4 & 5)
The Options Board is an installed circuit card that allows
for the connection of Arc Fault, Ground Fault, and Rapid
Shutdown System sensors (toroids).
Figure 4 shows the location of the Option Board
installed in the Hawke’s Bay.
Figure 5 shows the Options Board, sub-boards, and
connection receptacles.
Bypass Switch & TB1 (Figure 5)
For Rapid Shutdown System operations, the Hawke’s
Bay via the Options Board can be configured to accept an external switch to initiate Rapid
Shutdown.
On the lower right corner of the Options
Board is a Bypass Switch (CON4). To
allow an external switch to control RSS,
move the jumper to the JP2 position and
connect the wires from the external
switch into the RS Switch (TB1). TB1 is
Normally Closed (NC); NC means no Rapid
Shutdown. When the input to TB1
becomes open, Rapid Shutdown is
initiated. For internal MPPT initiation of
Rapid Shutdown, move the jumper to the
JP1 position.
Figure 4
RSS Board
AF/GF
Board
Bypass
Switch
TB1
Arc Fault
Rapid
Shutdown
Ground
Fault
Figure 5
Figure 3

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AF/GF Sub-board (Figure 6)
LEDs on the sub-board indicate:
•After boot-up (power on), D2 (green) should flash to indicate device is ready and working.
•If D6 (red) is flashing slowly, the device is either defective or coils aren't plugged in.
•If D1 (red) is on solid, then a GF is present.
•If D5 (red) is on solid, then an AF is present.
Arc Fault
The NEC requires that a PV system DC circuit operating at 80VDC or greater must be protected
by an arc fault (AF) circuit interrupter. The Options Board satisfies this NEC requirement. There
are no adjustments to be made for the AF system, other than ON or OFF. In the event the
Hawke’s Bay detects an AF, the charge controller will shut down with audible and visual AF
indications. The AF issue must be remedied before the controller can resume operations. Clear
the AF, then power cycle the Hawke’s Bay off then back on.
Connecting the AF/GF sub-board to the Options Board:
1. The AF/GF sub-board (purple) connects to the top half of the
Options Board. (Figure 7)
2. Align pins on sub-board to the Option Board’s receptacle, and
3. Align plastic support rod on Options Board to the associated
hole in the sub-board.
4. Gently seat the pins into the receptacle and the plastic support
through the hole.
Connecting the AF toroid to the Options Board:
1. AF toroid shown in Figure 8.
2. Connect AF toroid to Options Board.
3. Pass the PV-cable through the AF toroid, Figure 9.
Figure 7
Figure 8
D2
Gr
Figure 6
D5
Re
D1
D6
Re
d

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Activating Arc Fault:
1. Go to MPPT Config, then to External Sensors.
2. Go to AF, then ENABLE.
Ground Fault
Since 2008 the NEC requires a DC Ground Fault (GF)
Protection device on all PV systems to indicate when a GF
condition exists. For GF monitoring, you can either install the optional GF sensor (toroid) in the
Hawke’s Bay or install an external GF breaker into your PV system.
The Hawke’s Bay GF toroid works with either grounded or
ungrounded PV systems. When a GF condition occurs, the Hawke’s
Bay stops charging and announces a GF alert.
Connecting the GF toroid to the Options Board:
1. GF toroid shown in Figure 10.
2. Connect GF toroid to Options Board.
3. Pass PV+ AND PV-cables through GF toroid, Figure 11.
Activating Ground Fault:
1. Go to MPPT Config, then to External
Sensors
2. Go to GF, then ENABLE.
Rapid Shutdown System
The NEC requires a Rapid Shutdown System (RSS) to be installed to reduce shock hazards to
firefighters whenever PV system conductors are on or in a building other than a building whose
sole purpose is to house PV system equipment. When initiated RSS lowers PV string- or
module-level voltages to a prescribed voltage level in a prescribed timeframe. Basic RSS
components include PV string or module receivers and a transmitter.
Connecting the RSS sub-board to the Options Board:
1. The RSS sub-board (green) connects to lower half of Options Board, Figure 12.
Figure 10
Figure 9
Figure 11
Ensure tab on toroid jack
mates with the lock on
Option Board receptacle.

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2. Align pins of sub-board to Option Board’s receptacle, and
3. Align plastic support rod on Options Board to associated hole in sub-board.
4. Gently seat pins into receptacle and the plastic
support through the hole.
Connecting the RSS toroid to the Options Board:
1. RSS toroid shown in Figure 13.
2. Connect the RSS toroid to the Options Board.
3. Pass the PV-cable through the RSS toroid, Figure
14.
Battery Temperature Sensor
The Hawke’s Bay comes with a Battery Temperature
Sensor (BTS). This sensor provides the battery’s ambient
(exterior battery casing) temperature to the charge
controller, which is used to raise or lower the charge
voltage setpoints relative to a reference temperature.
Program the reference temperature as provided by the
battery manufacturer; 25C is a common reference
temperature. Program the temperature coefficient factor
as provided by the battery manufacturer; -5mV is a
common factor. If the BTS is disconnected or shorted, the
Hawke’s Bay will default to a neutral temperature of 25C
and will not temp-comp the charging voltages.
In addition to temp-adjusting the charging voltages as mentioned above, the Hawke’s Bay can
be programmed to stop charging based on either a high or low battery temperature setpoint.
Connecting the BTS:
1. Connect the phone jack of the BTS into the BTS receptacle on the Hawke’s Bay control
board, as marked by #3 in Figure 2.
Figure 12
Figure 13
Figure 14
Figure 15
When using all 3 toroids, stack
the toroids in this order, closest
to the terminal block:
1) GF toroid … 2) AF toroid …
3) RSS toroid.
Doing so will ensure proper fit
within the Hawke’s Bay chassis.
See Figure 15.

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2. Pick a battery in the middle of your battery bank. About halfway up the side of the
selected battery case, clean that area, remove the protective tape, and affix the BTS
sensor to the battery wall.
Whiz Bang Jr.
The Whiz Bang Jr (WBJr) is a current-sensing device that mounts to the side of a standard
500A/50mV shunt. The WBJr measures the current across the shunt into (and out of) the
battery bank and reports this current flow to the Hawke’s Bay to be used in calculating an
accurate State of Charge (SOC) percentage and to monitor for Ending Amps, which is a targeted
setpoint to terminate the Absorb charge cycle.
The WBJr is mounted on the side of a shunt. The shunt is wired in series on the electric low
side, or negative side, of your system. See Figure 16. The wire marked “Cable to Inverter
Negative” shows the shunt connection point for ALL negative wires from charge controllers,
inverter, wind turbine negative, and even a battery charger running off a generator. All
negatives land there. The other shunt bolt connection is the single cable from the shunt to the
battery bank’s master negative terminal.
Connecting the WBJr:
1. Connect the WBJr’s purple wire to the terminal block, #4, as shown in Figure 2.
2. Referencing Figure 16:
a. If the WBJr purple wire is pointing to
the right as shown, then the shunt’s big
right bolt is connected to the battery
bank’s master negative terminal. There
can ONLY be one wire connected to this
shunt bolt.
b. Connect the inverter’s Batt- cable, the
Hawke’s Bay Batt- cable, and all other
DC- cables to the left bolt of the shunt.
Activating the WBJr:
1. In the Setup / Battery Config Menu, you need to program the following setpoints:
Figure 16
For double-wall battery construction, consult the battery manufacturer for BTS sensor placement.

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a. Absorb Time –Calculate the normal Absorb time then add one hour. This will
ensure that enough time is allowed for Ending Amps to be achieved.
b. Ending Amps –Usually 1 –3% of batt bank Ah capacity.
c. Battery Capacity –Batt bank’s 20-hr Ah capacity.
d. Amp-Hour Efficiency –Good starting point is 80% for flooded; 85% for sealed; 94%
for Lithium.
2. Go to Setup / MPPT Config / External Sensors, then WBJr, and set to Battery.
Battery Sense Circuit
The Hawke’s Bay measures battery bank voltage via the Batt+ and Batt- cables connected to the
battery bank, and it compares that measured voltage with the Battery Sense Circuit connection.
If the Battery Sense voltage is within a pre-set range, the system will automatically use this
voltage versus the voltage on the high current connections (the Hawke’s Bay’s actual battery
cables). Only one Battery Sense wire connection to the battery bank is required for an entire
system (i.e., multiple Hawke’s Bays, Barcelonas, and/or Rosie inverter/chargers).
Connect two #22 AWG wires from the #4 terminal block (See Figure 2) directly to the battery
bank master positive and negative terminals. Install a 1A fuse on the positive wire. Use the
shortest length of wire possible. Crimp terminal lugs (ring connectors) on the ends that connect
to the battery terminals.
HAWKE’S BAY WIRING
PV (Figure 17)
•Connect PV+ and PV- wires to the Hawke’s Bay
terminal block.
•Torque to 39.8 in-lbs.
•Route PV- directly from the PV array to the
Hawke’s Bay PV- terminal.
Figure 17
The WBJr can be installed with the purple wire pointing left or right. BUT … the battery
negative cable must be on the same side as the purple wire!

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BATTERY (Figure 17)
•Connect #2 AWG Batt+ and Batt- cables to the terminal block.
•If using fine stranded cable, crimp a ferrule onto the cables ends, then insert into the
terminal block and torque. Otherwise, insert bare wire into the terminal block.
•Torque to 39.8 in-lbs.
ENERGIZING THE HAWKE’S BAY
Read and follow the information below and the procedural steps listed by number to properly
energize and test the charge controller.
Voltmeter –Measure for battery bank voltage between the Hawke’s Bay Battery breaker (at
bottom of breaker) and the Batt- terminal inside the Hawke’s Bay.
oBattery bank voltage present?
▪Yes –Good (29-65VDC is good)
▪No –Check DC wiring to the battery. Check batteries.
•Close the Hawke’s Bay Battery breaker.
•Voltmeter –Measure for battery bank voltage between the Hawke’s Bay Batt+ and Batt-
terminals.
oBattery bank voltage present?
▪Yes –Good. The Hawke’s Bay will automatically turn on now.
▪No –Check DC wiring or battery breaker.
•Depress the Setup button, highlight Battery Config, depress the rotary knob.
Step #2 –Program Hawke’s Bay
TORQUE SPECS
Battery Terminals –39.8 in-lbs
PV Terminals –39.8 in-lbs
Ground Terminal - 35 in-lbs
Step #1 –Battery
•
The PV negative from the PV array must be
wired directly into the Hawke’s Bay.
•Do NOT bond PV negative to ground, the
GF sense circuit will not work.
CAUTION!
Ensure all breakers are OFF ….. You will need a multimeter

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•Program per your battery specifications.
•Connect or turn on the DC input (PV combiner –ON).
•Voltmeter –Measure for PV (open-circuit) voltage between PV+ breaker (at the bottom
terminal) and PV- terminal (inside the Hawke’s Bay).
oPV voltage (Voc, open-circuit voltage) present?
▪Yes –Good (=/> 240Voc is good)
▪No –Check PV combiner breakers, PV wiring, or connections.
•Turn on (close) the PV breaker.
•Voltmeter –Measure for PV (max power) voltage between Hawke’s Bay PV+ and PV-
terminals.
oPV voltage (Vmp) present?
▪Yes –Good
▪No –Check connections, PV IN breaker, wiring; Is the Hawke’s Bay charging?
OPERATION
System and Device Naming
•There are two naming conventions in the Hawke’s Bay:
o1) Naming the device (Hawke’s Bay).
o2) Naming the system.
•One MNGP2 can control multiple CANBUS devices, such as the Hawke’s Bay, the Barcelona,
and the Rosie inverter/charger. Therefore, one MNGP2 can look at each device by name.
•System naming refers to pre-selected parameters that will be globally shared amongst the
devices. For example …
oYou buy one Hawke’s Bay with an MNGP2.
oYou name your device “Home HB.”
oYou program “Home HB” for your new Lithium batteries.
oThen you buy a second Hawke’s Bay. You name the new device “Garage HB.”
oWhen Garage HB is connected to CANBUS, it will automatically be programmed for
the Lithium batteries, just like in Home HB.
oBUT … if you bought/installed a device that was previously programmed by the prior
user, when this device is connected to CANBUS, the MNGP2 will recognize there are
now 2 system names (i.e., two completely different charging profiles), and you will
be asked “Which system do you want?”
Step #3 –PV