Projecta DC-DC 12/24v 25A 3 Stage ChargingSealed to IP67, the IDC25 is dust splash and shock proof and can safely operate in extreme temperatures to 80 Degrees Celsius Engineered to work with both smart and conventional alternators Set the charging profile to suit battery chemistry type: Wet, Calcium AGM or Gel Simultaneous dual battery charging from both solar and alternator inputs Over temperature, reverse connection, over under and spark free protection Warranty Two Years Power Rating