The IDC25 allows you to charge your 12V second/auxiliary deep cycle battery on the go, simultaneously from solar and your alternator (9-32V) inputs. Providing an advanced 3 stage charging process to produce a safe and comprehensive charge, this charger is the perfect power solution for your outdoor and offroad adventures. Sealed to IP67, the IDC is dust, splash and shock proof and can safely operate in extreme temperatures up to 80°C meaning you can conveniently install this in your engine bay. Multi-Chemistry compatible, just set the charging profile to the battery type: Wet, Calcium AGM or Gel. ALTERNATOR INPUT VOLTAGE:9-32Vdc MAX SOLAR INPUT:28Vdc, 385W OUTPUT CURRENT:Input 9-11Vdc 20A,Input 11-32Vdc 25A BACK DRAIN ON AUX BATTERY:9.5-10.5mA CHARGER CONTROL:Gel: 14.1V,AGM: 14.4VWet: 14.7V,Calcium: 15.4V BATTERY CAPACITY:75-300Ah BATTERIES SUPPORTED:Gel, AGM, Wet & Calcium SMART ALTERNATOR:12V: Turn On: 12.2-20V24V: Turn On: 24.4-32V / Turn Off: <11.9VTurn Off: <24V CONVENTIONAL ALTERNATOR:12V: Turn On: 13.4-20V24V: Turn On: 26.8-32V /Turn Off: <12.8VTurn Off: <25.6V OPERATING TEMPERATURE;-10°C to +80°C