Width 250mm x Depth 125mm x Height 67mm BCT3 Sargent PX300/PX310 3 Stage Battery Charger - Quality Caravans and Trickle Charger DC-DC Battery Charger - 20 Amp 24V - Hulk Pro Motorhome Power Unit This is a 230v Caravan or Motorhome Mains battery charger power unit / Transformer as fitted in some of the Lunar, Bailey, Elddis & Coachman rangers. The unit has an internal cooling fan which automatically switches on when using more than 8amp BCA 20 Amp Power Unit Transformer /Battery Charger Caravan Motorhome , 20 Amp Power Supply., 13., 8 volts d., c output., 230 volt input. Caravan Motorhome Mains Power Transformer Battery Charger 12V 20A PO120. Tested to British and European standards and come complete with user instructions BCA 20 Amp Power Unit Transformer /Battery Charger Caravan Motorhome - 20 Amp Power Supply., 13., 8 volts d., c output., 230 volt input.