The Mastervolt Charge Mate is a relay based switch that combined 2 batteries during charging, but isolates them when they are discharging, enabling the second battery to be charged regularly.

General specifications

Battery voltage: 12/24 V

Max. current: 120 A

Dimensions, hxwxd: 76 x 46 x 46 mm (3.0 x 1.8 x 1.8 inch)

Weight: 0.125 kg (0.3 lb)

Compliance: CE

Technical specifications

Power consumption: switch open: < 1 mA at 12/24 V DC

Inrush current (250 ms): 2000 A

Switch on voltage: 13-15 V (12 V) / 26-30 V (24 V)

Switch on delay: 5 sec

Switch off voltage: < 12.75 V (12 V) / < 25.5 V (24 V)

Switch off delay: no

Relay: electro-mechanical

Temperature range (ambient temp.): -40 °C to 65 °C (-40 °F to 149 °F)

Protection degree: IP21