Go Power GP-BMK-50 User Manual
Battery monitor
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Summary of Contents for Go Power GP-BMK-50
- Page 1 BATTERY MONITOR GP-BMK-50 User Manual © 2018 Go Power! ® Worldwide Technical Support and Product Information gpelectric.com Go Power! Headquarters 201-710 Redbrick St, Victoria, BC Canada V8T 5J3 MAN_GP-BMK-50_RevE...
- Page 2 [page 2] | gpelectric.com...
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Page 3: Table Of Contents
SYNCHRONIZING THE GP-BMK-50 ..............8 COMMON PROBLEMS ..................9 FEATURES AND FUNCTIONALITY ..................10 WHY SHOULD I MONITOR MY BATTERY? ............10 HOW DOES THE GP-BMK-50 WORK? ............... 10 4.2.1 BATTERY CAPACITY AND RATE OF DISCHARGE ......10 4.2.2 CHARGE EFFICIENCY (CEF) ..............11 BATTERY STATE-OF-CHANGE DISPLAY OPTIONS ...........11... - Page 4 Safety Precautions 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 flame in the vicinity of a battery. Provide sufficient ventilation around the battery. Wear eye and clothing protection.
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Page 5: Getting Started
When using a shunt other than the one supplied with the GP-BMK-50, please refer to section 3.6. The set-up wizard below must be completed before other settings can be made. -
Page 6: Important Combined Button Functions
GETTING STARTED When in normal mode, the back-light of the GP-BMK-50 switches off after no key has been pressed for 60 seconds. Press any key to restore the back-light. Go Power disclaims liability for any direct, indirect or incidental damages caused by, or in case of, installation not performed following the instructions and cautions in this manual. -
Page 7: Normal Operating Mode
3. NORMAL OPERATING MODE READ-OUT OVERVIEW In normal operating mode, the GP-BMK-50 displays an overview of important parameters. The + and - selection buttons give access to various read-outs. BATTERY VOLTAGE: AUXILIARY BATTERY VOLTAGE: When the auxiliary input is set to START. -
Page 8: Synchronizing The Gp-Bmk-50
NO SIGNS OF LIFE ON THE DISPLAY Probably the GP-BMK-50 is not properly wired. The UTP cable should be properly inserted at both ends, the shunts must be connected to the minus pole of the battery and the positive supply cable should be connected to the plus pole of the battery with the fuse inserted. -
Page 9: Features And Functionality
Doing this will extend battery liferesulting in the GP-BMK-50 quickly paying for itself. HOW DOES THE GP-BMK-50 WORK? The main function of the GP-BMK-50 is to follow and indicate the state of change of a battery, in particular to prevent unexpected total discharge. -
Page 10: Charge Efficiency (Cef)
The GP-BMK-50 is supplied with a 500A/50mV shunt. For most applications, this should be suitable, however, the GP-BMK-50 can be configured to work with a wide range of different shunts. Shunts of up to 9999A and/or 75mV can be used. -
Page 11: Automatic Detection Of Nominal System Voltage
After completion of the set-up wizard, set the proper shunt current and shunt voltage according to Section 4.2.5, setting number 65 and 66. If the GP-BMK-50 reads a non-zero current, even when there is no load and the battery is not being charged, calibrate the zero current reading (see section 4.2.1, setting number 09). -
Page 12: Interface Options
90% state of charge. See section 4.2.2. The relay function can be inverted: de-energized becomes energized and vice versa. See section 4.2.2. When the relay is energized, the current drawn by the GP-BMK-50 will increase slightly (see technical data). INTERFACE OPTIONS 4.8.1 CUSTOM INTEGRATION (PROGRAMMING REQUIRED) -
Page 13: Midpoint Voltage Monitoring
A timely alarm can be generated by monitoring the midpoint of the battery bank. For more information, see section 5.1. USING THE MENUS Four buttons control the GP-BMK-50. The function of the buttons depends on which mode the GP-BMK-50 is in. gpelectric.com | [page 13]... - Page 14 FULL SET-UP DETAILS When power is applied for the first time or when factory settings have been restored, the GP-BMK-50 will start the set-up wizard (see section 2). Thereafter, if power is applied, the GP-BMK-50 will start in normal mode (see section 3).
- Page 15 09. Zero Current Calibration If the GP-BMK-50 reads a non-zero current even when there is no load and the battery is not being charged, this option can be used to calibrate the zero reading. Ensure that there really is no current flowing into or out of the battery (disconnect the cable between the load and the shunt), then press SELECT.
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Page 16: Full Set-Up Details
FULL SET-UP DETAILS 5.2.2 RELAY SETTINGS Remark: thresholds are disabled when set at 0. 11. Relay Mode DFLT Default mode. The relay thresholds Nos. 16 up to 31 can be used to control the relay. CHRG Charger mode. The relay will close when the state of charge falls below setting 16 (discharge floor) or when the battery voltage falls below setting 18 (low voltage relay). - Page 17 21. Clear High Voltage Relay When the battery voltage falls below this value, the relay will open (after a delay, depending on setting 14 and/or 15). This value needs to be less than or equal to the previous parameter. GP-BMK-50 Default Range...
- Page 18 FULL SET-UP DETAILS 25. Clear High Starter Voltage Relay When the auxiliary voltage falls below this value, the relay will open (after a delay, depending on setting 14 and/or 15). This value needs to be less than or equal to the previous parameter. Default Range Step Size...
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Page 19: Alarm Buzzer Settings
It does not energize the relay. 38. Clear High Voltage Alarm When the battery voltage falls below this value, the alarm is turned off. This value needs to be less than or equal to the previous parameter GP-BMK-50 Default Range Step Size 0-95V 0.1V... - Page 20 FULL SET-UP DETAILS 40. Clear Low Starter Voltage Alarm When the auxiliary voltage rises above this value, the alarm is switched off. This value needs to be greater than or equal to the previous parameter. 41. High Starter Voltage Alarm When the auxiliary (e.g.
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Page 21: Display Settings
FULL SET-UP DETAILS 48. Clear Mid Voltage Alarm When the mid-point voltage deviation falls below this value, the alarm is switched off. This value needs to be less than or equal to the previous parameter. Default Range Step Size 1.5% 0-99% 0.1% 5.2.4 DISPLAY SETTINGS... -
Page 22: Miscellaneous
OFF/ON 5.2.5 MISCELLANEOUS 61. Software Version (Read Only) The software version of the GP-BMK-50. 62. Restore Defaults Resets all settings to factory default by pressing SELECT. When in normal operating mode, factory settings can be restored by pressing SETUP and SELECT simultaneously for 3 seconds (only if setting 64, Lock setup, is off). -
Page 23: History Data
50mV 1mV-75mV HISTORY DATA The GP-BMK-50 tracks several parameters regarding the state of the battery which can be used to evaluate usage patterns and battery health. Enter history data by pressing the SELECT button when in normal mode. Press + or - to browse the various parameters. - Page 24 The value which can be adjusted in Peukert’s formula is the exponent n: see the formula below. In the GP-BMK-50, Peukert’s exponent can be adjusted from 1.00 to 1.50. The higher the Peukert exponent the faster the effective capacity ‘shrinks’ with increasing discharge rate. An ideal (theoretical) battery has a Peukert Exponent of 1.00 and has a fixed capacity;...
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Page 25: More About Peukert'sformula & Midpoint Monitoring
MORE ABOUT PEUKERT’S FORMULA & MIDPOINT MONITORING the 20 h discharge rate 2) and for example a 5h discharge rate 2. See below for an example of how to calculate the Peukert exponent using these two specifications. 5h rating = 75Ah = 5h 75Ah = 15A... -
Page 26: How The % Midpoint Deviation Is Calculated
MORE ABOUT PEUKERT’S FORMULA & MIDPOINT MONITORING Please note that the midpoint deviation will be small when the battery bank is at rest, and will increase: a) at the end of the bulk phase during charging (the voltage of well charged cells will increase rapidly while lagging cells still need more charging), b) when discharging the battery bank until the voltage of the weakest cells starts to decrease rapidly, and c) at high charge and discharge rates. -
Page 27: Alarm Delay
MORE ABOUT PEUKERT’S FORMULA & MIDPOINT MONITORING 6.2.3 ALARM DELAY In order to prevent the occurrence of alarms due to short term deviations that will not damage a battery, the deviation must exceed the set value during 5 minutes before the alarm is triggered. A deviation exceeding the set value by a factor of two or more will trigger the alarm after 10 seconds. -
Page 28: Lithium Iron Phosphate Batteries (Lifep04)
100Ah battery if the system is left in discharged state during more than 10 days (4mAx24h x 10 days = 0,96Ah). The GP-BMK-50 draws 4mA from a 12V battery. The positive supply must therefore be interrupted If a system with Li-ion batteries is left unattended during a period long enough for the current draw by the GP-BMK-50 to completely discharge the battery. -
Page 29: Display
Unit of the selected item (e.g. W, kW, kWh, h, V, %, A, Ah, °C, °F) Alarm indicator Scrolling The GP-BMK-50 features a scrolling mechanism for long texts. The scroll speed can be changed by modifying the setting scroll speed in the settings menu. See section 4.2.4, parameter 51. gpelectric.com | [page 29]... - Page 30 [page 30] | gpelectric.com...
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Page 31: Technical Data
9. TECHNICAL DATA GP-BMK gpelectric.com | [page 31]... - Page 32 BLUETOOTH DONGLE With the Go Power! Bluetooth Dongle you can pair your phone to the Go Power! Connect app to receive live status info, see historical values from your GP-BMK and configure Go Power! products. Get live updates from your RV remotely using the Go Power! app for Android and iOS devices.
- Page 33 BATTERY MONITOR TEMPLATE gpelectric.com | [page 33]...
- Page 34 © 2018 Go Power! ® Worldwide Technical Support and Product Information gpelectric.com Go Power! Headquarters 201-710 Redbrick St, Victoria, BC Canada V8T 5J3 MAN_GP-BMK-50_RevA.6 [page 34] | gpelectric.com...
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