Go Power GP-BMK-25 User manual

<Running header 1 line>
BATTERY MONITOR
GP-BMK-25
User Manual
© 2020 Go Power!®
Worldwide Technical Support and Product Information gpelectric.com
Go Power! Headquarters
201-710 Redbrick St, Victoria, BC Canada V8T 5J3
Tel: [phone]
MAN_GP-BMK-25_RevA

gpelectric.com | [page 3]
1. CONTENTS
2. INTERFACE......................................................................................5
3. OPERATION.....................................................................................6
3.1 SETTINGS MENU..............................................................6
3.2 SLEEP/WAKE UP ..............................................................8
3.3 SPECIFICATIONS .............................................................8
4. INSTALLATION .............................................................................. 10
4.1 WIRING DIAGRAM ............................................................9
4.2 WIRE CONNECTIONS.......................................................9
4.3 MOUNTING THE REMOTE DISPLAY..............................10
4.3 MOUNTING THE SHUNT ................................................10
5. DIMENSIONS .................................................................................11
6. TROUBLESHOOTING..................................................................12
7 . WARRANTY...................................................................................13
5.1 WARRANTY LENGTH .....................................................13
5.2 WARRANTY RETURN PROCEDURE............................. 13
8. TEMPLATE.....................................................................................14

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Safety Precautions
WARNING!
Personal Injury
Working in the vicinity of a lead acid battery is
dangerous. Batteries can generate explosive
gases during operation. Never smoke or allow
a spark or ame in the vicinity of a battery.
Provide su󰀩cient ventilation around the
battery.
Wear eye and clothing protection. Avoid
touching eyes while working near batteries.
Wash your hands when done.
If battery acid contacts skin or clothing, wash
them immediately with soap and water. If acid
enters an eye, immediately ood the eye with
running cold water for at least 15 minutes and
get medical attention immediately.
Be careful when using metal tools in the
vicinity of batteries. Dropping a metal tool
onto a battery might cause a short circuit and
possibly an explosion.
Ensure that children, pets, and other animals
are kept away from the inverter, solar arrays,
battery bank, and utility grid components.
Remove personal metal items such as rings,
bracelets, necklaces, and watches when
working with a battery. A battery can produce
a short circuit current high enough to melt
objects such as rings, causing severe burns.

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2. INTERFACE

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3.1 SETTINGS MENU
DEFINITIONS:
Preset Capacity - The remaining available capacity of the battery in Ampere-hours.
Charge-Discharge Indicator - If the arrows are pointing upward the battery is
charging, downward the battery is discharging.
Capacity Percentage - The remaining available capacity of the battery as a
percentage.
Remaining Time - The time left until the battery is either completely charged
or completely discharged.
Preset Power - The amount of power either entering or exiting the battery.
Preset Current - The amount of current either entering or exiting the battery.
Preset Voltage - The voltage measured at the battery terminals.
State of Charge Graphic - This is a graphical representation of the state of
charge of the battery.
Zero Capacity Voltage - This is the lower voltage threshold used to reset the
state of charge to 0% so the battery monitor stays in sync with the battery.
Full Capacity Voltage - This is the lower voltage threshold used to reset the
state of charge to 0% so the battery monitor stays in sync with the battery.
USING THE SETTINGS MENU:
1 Press the key for 3s to enter setting menu;
2. Click or key to select the setting items.
INITIAL SET UP:
Calibration is required when the GP-BMK-25 is connected for the rst time, or
your battery bank is being replaced.
If you are starting with a full battery, on the main screen hold the key
for 3s to set the capacity to 100%.
If you are starting with an empty battery, hold the key for 3s while on
the main screen to set the capacity to 0%.
3. OPERATION

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SETTING THE BATTERY CAPACITY:
Select CAP and click the key to enter the pre-set capacity setting;
The set value will icker, clicking the key can select other values.
Click the or key to select the correct values.
After this click the key to quit pre-set capacity setting
SETTING VOLTAGE PARAMETERS:
The "High V" and "Low V" parameters in the settings screen are for automatic
state of charge synchronization. If the battery voltage is above "High V" the
state of charge will reset to 100% and if it falls below "Low V" the state of
charge will reset to 0%. Setting either of these values to zero will disable this
function.
Note If the battery is going to be heavily discharged then use 0 for
Low V, which would disable the low voltage reset.
The following table contains suggested voltages for common battery types.
High Voltage Low Voltage
Gel 14.1 9
Flooded 14.4 9
AGM 14.4 9
LiFePO4 14.2 9
Note These are suggested values only and may not work for
all applications. Conrm with your battery manual for the
accurate voltage parameter information.
OPERATION

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SETTING LOW CAPACITY ALARM:
This is the lower battery capacity limit in ampere-hours. If the battery is
discharged below this limit and audible alarm will sound. Setting this value to
zero will disable this function.
3.2 SLEEP/WAKE-UP
The GP-BMK-25 will go into a sleep mode if the battery current drops below
a certain level. To “wake” the GP-BMK-25 from this mode, press any key. The
GP-BMK-25 screen will automatically wake once the battery starts charging or
discharging TURN OFF BACKLIGHT
While charging the battery, the LCD screen's backlight will slowly ash. To
turn o󰀨 the backlight, long press to turn o󰀨 the backlight, long press
again to wake up the backlight.
3.3 SPECIFICATIONS
DESCRIPTION PARAMETER
Working Voltage 10.0 - 12.0 V
Voltage Accuracy ±1.0 %
Current Accuracy ±1.0 %
Capacity Accuracy ±1.0 %
Backlight on Current (>50A) 100 mA
Present Capacity Value 0.1 - 9999.0 Ah
Temperature Range -10 - 60 °C (14 - 140 °F)
Weight (LCD Interface) 2.6 oz / 75 g
Size (LCD Interface) 3.9 x 2.4 x 0.7 inch (9.9 x 6.1 x 1.8 cm)
Shielded Wire 20 ft (6 m )
B+ Wire 3 ft (1 m)
OPERATION

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4. INSTALLATION
4.1 WIRING DIAGRAM
Battery
Battery Monitor
+-
Shunt
Solar Controller
To
DC Loads
Note Please connect as shown with all loads and charging sources
connected to the "P-" side of the shunt. The shunt must be
connected to the negative circuit. DO NOT connect to the
positive circuit.
4.2 WIRE CONNECTIONS
1. Before doing anything, disconnect all wires from the negative side of the
battery.
2. Cut the negative cable for the battery and crimp on new ring terminals.
Alternatively, use a new wire of appropriate gauge to carry the full current
demand of the system.
3. Connect the shunt as shown in the wiring diagram above.
The negative terminal of the battery must connect directly to the
“B-“ side of the shunt and there should be no other connections
to the negative terminal of the battery.
Note

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4.3 MOUNTING THE REMOTE DISPLAY
The remote display can be mounted by following these steps.
1. Plan the location of your remote display carefully. Keeping in mind the cable
needs to be run from the shunt to the monitor.
2. Use the installation template on the last page of this manual to cut a hole.
• The remote display uses clips to stay in place so the hole size needs
to be as accurate as possible.
• Using a jigsaw is recommended.
3. Run the shielded cable from your battery bay and feed it through the cut hole.
4. Connect the shielded cable to the remote and snap the remote into place.
4.4 MOUNTING THE SHUNT
The shunt comes with a mounting bracket that should be secured using screws
to ensure the shunt does not move.
INSTALLATION
4. Using the red wire, connect the ring terminal end of the wire to positive of
battery. The other end connects to B+ of Shunt.
Do not stack smaller terminals under large ones.
5. Connect the Shunt to the GP-BMK-25 using the shielded wire to test.
If done correctly the display will turn on. Disconnect again so remote
display can be mounted.
Note

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2. GETTING STARTED
5. DIMENSIONS
OK
99 mm
61 mm
2.4in
3.9in
3.3in
2.9in
0.9in
0.2in
1.1in
1.3in
1.7in
18 mm
0.7in
mm
24mm
42mm
85mm
6mm
27mm
33mm
74.2mm
BATTERY MONITOR
Go Power!
®

[page 12] | gpelectric.com
6. TROUBLESHOOTING
Issue: Backlight is blinking when connecting the load for the rst time
Remedy: the B- and P- wires on the shunt are wired backwards.
Issue: BMK-25 screen is blank
Remedy #1: When the battery current is low the GP-BMK-25 will enter a low
power (sleep mode) and the backlight will turn o󰀨, press any button and the
backlight will turn on for 10s.
Remedy #2: Check the connection if the screen does not respond. Then charge
or discharge the battery and check whether the display current is equal to the
actual current. If the deviation is large, please check the connection.
Issue: The GP-BMK-25 State of Charge is innacurate or resets to zero or 100%
unexpectedly.
Remedy #1: It could be that the way your battery is being used is causing the
state of charge to reset prematurely. For more accurate SOC, complete the
following steps:
1. The High V and Low V should both be set to zero
2. Turn all loads o󰀨
3. Turn battery charger on
4. Wait for voltage to be 14.1 (Gel) / 14.4 (Flooded or AGM) / 14.2 (LiFePO4)
and current into battery to be 1.5% - 2% of Ah capacity of the battery
5. Hold up arrow on BMK to reset SOC to 100%
This manually synchronizes the SOC of the GP-BMK-25 with the SOC of the
battery, and can be done as often as is desired.
Remedy #2: Check that the shunt is wired in the correct orientation according
to the wiring diagram in section 3.5 of this manual.

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7. WARRANTY
5.1 WARRANTY LENGTH
Go Power! electronic products are non-repairable, Go Power! does not perform
repairs on its products nor does it contract out those repairs to a third party. Go
Power! does not supply schematics or replacement parts for any of its electronic
products.
This Go Power! warranty is valid against defects in materials and workmanship
for the specic product warranty period. It is not valid against defects resulting
from, but not limited to:
• Misuse and/or abuse, neglect or accident
• Exceeding the unit’s design limits
•
Improper installation, including, but not limited to, improper environmental
protection and improper hook-up
• Acts of God, including lightning, oods, earthquakes, re, and high winds
• Damage in handling, including damage encountered during shipment
A warranty shall be considered void if the warranted product is in any way opened
or altered. The warranty will be void if any eyelet, rivets, or other fasteners used
to seal the unit are removed or altered, or if the unit’s serial number is in any
way removed, altered, replaced, defaced, or rendered illegible.
5.2 WARRANTY RETURN PROCEDURE
Before contacting Go Power!’s customer service department, please read the
“frequently asked questions” section of our website to troubleshoot the problem.
If trouble persists:
1. Call your Go Power!™ Technical Support team (1-866-247-6527) or
2. Return defective product to place of purchase
An RMA number (Return Materials Authorization number) from Go Power! Cus-
tomer Service is required prior to returning any Go Power!. Go Power! reserves
the right to refuse any items sent to Go Power! without an associated RMA
number.
To obtain an RMA number, please contact [email protected] or Tele-
phone [phone] or Fax [phone] worldwide.

[page 14] | gpelectric.com
© 2020 Go Power!®
Worldwide Technical Support and Product Information gpelectric.com
Go Power! Headquarters
201-710 Redbrick St, Victoria, BC Canada V8T 5J3
Tel: [phone]
MAN_GP-BMK-25_RevA
8. TEMPLATE
57mm
94mm