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: 500 A Number of modes: on, off, auto, start assist Dimensions, hxwxd: 90 x 80 x 85 mm (3.5 x 3.1 x 3.3 inch) Weight: 0.65 kg (1.4 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 : 30 sec Switch off voltage: < 12.25 V... > 15 (12 V) / < 25.5... > 30 V (24 V) Switch off delay: 3 minutes Relay: electro-mechanical Temperature range (ambient temp.): -40 C to 60 C (-40 F to 140 F) Protection degree: IP21
