Alarm Battery Bank Monitor Minder Low Voltage Discharge Alert 12V Sailboat RV #BTM6A

Sale price $27.95 Regular price $36.95

Tax included.

Monitor your battery or battery bank for a low voltage discharge condition.

Fully wired 12 volt battery monitor panel. Alarms when battery voltage drops to 50% the minimum voltage level, when the battery must be charged. The Built in voltmeter indicates the voltage level. The built in high pitch tonal alarm and blinking warning LED alerts you to the low battery condition. A three position switch allows you to turn off the alarm. The switch has two alarm monitoring positions; one with the voltmeter display on and one position without the voltmeter display for low current monitoring. Center position of the switch is all off. The panel is splash proof from the front. #BTM6A

This pre-wired assembly consists of a built in battery voltage monitoring circuit board, a high quality voltmeter for checking the voltage level of your battery, built in tonal alarm and blinking red indicator, and a three position waterproof switch to control the panel.

The panel monitors your battery when the voltage drops to 12 volts the alarm goes off telling you to charger your battery before permanent damage is done to your battery in the low discharge state.  


The meters have easy to read red LED segments and connect to your 12 volt battery. The meter front is splash proof. The meter draws nominally 10 ma. 


High volume notification tonal alarm with a bright blinking red LED draws 10 ma when in the alarm condition.


Three position switch. Center off draws no power. Monitor position I Monitors only and draws minimal power. When a low voltage condition occurs the alarm will sound. Monitor position II has the voltmeter active and monitors the battery.

Mounting and installation

The  mounting plate allows the assembly to be mounted in a panel of any thickness the panel hole size is 3-14" square. Depth required 2-1/2"'

Stackable can be mounted horizontally or vertically meter can be rotated. Use one for each battery bank.


-Working Voltage: DC 10-16 Volts +/- 10%.

- Monitor trip voltage 11.9 volt +/-  10%,  factory adjustable 10-14 volts. 

-Polarized male 0.250 stud disconnect crimp terminals.

- Alarm:

            Piezoelectric 3900 +/- 500 Hz.

           Sound volume: 80 db. 

           Sound type: intermittent one second on/off. 

           LED Brightness:≥500cd.

Operating Current:

            Monitor position I monitoring only less than 1ma.

            Monitor position II monitoring and voltmeter 10 ma.

            Center position off.