RS20 Automatic Start-Battery Isolator / DC Volt Meter / Water Tank Meters x3

RS20 model Automatically disconnects start-battery from house-battery when RV engine shuts off (avoids flattening start-battery when running appliances while parked). Allows start-battery to charge before connecting house-battery. Otherwise known as a VSR (voltage sensitive relay) Automatically connects house-battery to alternator when driving to charge house-battery Alarms when house-battery is too low or too high (under 11.8V, over 15.0V). Peace of mind when drawing power from or charging your expensive house-batteries Monitors up to 3 water tanks including grey water (tank sensor cables to be purchased separately) Suitable for metal and non-metal tanks Simple to integrate with solar panels Automatically reduces charge rate if house-battery is over charging (if house-battery exceeds 15.1V) Items included: -RS20 wall-mount unit -30amp ring terminals (for cable AWG10 - 12) -Mounting screws -Manual Product dimensions: 137mm x 94mm x 25mm