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Nasa Marine BM-1 Battery Monitor

The BM-1 is designed to monitor performance of 12 volt lead acid battery systems with capacities of up to 600 Amp hours. A prefabricated cable assembly to enable simple DIY installation. The unit continuously monitors voltage, current (charge or discharge), number of amp/hours (charge or discharge), the batteries state of charge and the time to charge or discharge. This information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.

Supply voltage
8 - 16 Volts DC
Supply current 1.5 milliamps
Battery capacities 5 - 600 AMP Hour
Load current 100 AMPS Maximum
Charge current 100 AMPS Maximum
Shunt Required Standard 50 millivolt @ 100 AMP

Cables supplied:
100 AMP shunt link to M8 Ring terminal.
5 Metre from display unit to battery - fused and fitted with ring terminals for shunt, fuse holder and M8 ring terminal to battery.

Display unit
Standard 110mm square Clipper case. High contrast LCD, backlit for night viewing.
Minimum voltage visual alarm
Simple operation - 4 keys to select backlight, Volt/Amp/State of Charge screen,