Victron Battery Alarm GX:
The Battery Alarm is a small and low cost alarm panel which monitors your battery bank. It features both audible and visual alarms, as well as a potential free contact with normally open and normally closed contacts. Alarm thresholds and hysteresis are programmable by DIP switches. See manual for more information.
Manual:
https://www.victronenergy.com/upload/documents/Manual-Battery-alarm-EN.pdf
