Victron Battery Monitors are one of the most effective ways to prevent damage to your expensive batteries, due to excessive discharge. The Battery Monitor will display the State of Charge, it counts the amount of current going into and out of your battery (in Ah). The relay can be used to take preventative action by automatically starting a generator to charge the batteries or to disconnect/connect loads (when connected to a relay/contactor) . An inbuilt buzzer can be set to buzz when the State of Charge reaches a certain level.
Please check under the Category “Panels and System Monitoring” for the full range of Battery Monitors.