You need a couple things....A Cascade Power Supply (w/Smart Charger) and Honda EU 2000 Generator...DCB rigged my supply to run through the batteries so at night I could smart charge them...during listening unplug the smart charge RJ11 jack and then you get the full power supply....depending on the amount watts you are pushing will help you decide on the Cascade unit size...I am pushing around 3000watts so I went with the 90Amp unit.....The generator powers the Power Supply when listening to the system docked or parked or you can run off batteries when running or parked...but using the power supply generator keeps the batteries from going dead while parked.