NASA Battery Battery Battery BM-2 Battery Monitor 12 V 200 A | 4Boats

Compact BM-2 battery monitor for 12 V lead‑acid systems. Supplied with a precision 200 A, 50 mV shunt and a prefabricated cable for straightforward DIY installation and continuous battery performance monitoring.

• Supply voltage 8–16 V DC
• Supply current 1.5 mA
• Battery capacities 5–999 Ah
• Load/charge current measurable up to 199 A (shunt rated 200 A)
• Shunt standard 50 mV @ 200 A
• AMP. Cables supplied: 200 AMP shunt link to M8 Ring terminal and 5 Metre from display unit to battery
• Monitors voltage, charge/discharge current, amp‑hours, state of charge and time to charge/discharge; resettable Ah counter and second starter battery input
• Compact size 125 × 62 × 23 mm (4.92 × 2.44 × 0.91 in)

The BM-2 uses dual algorithms to provide accurate state‑of‑charge estimation and time‑to‑charge readings, helping to extend battery life and reduce the risk of failure on boats, RVs and off‑grid systems.