We hold 20 gallons fresh water, the pressurized water system for the galley sink also feeds a rear shower. Heating is thru webasto diesel heater, which will be very much appreciated in the sierras this winter. The Domestic fridge, LED lights and Fantastic fan, etc is powered thru undercarriage house AGMs, and fueled by 200 watts of solar on roof. We have multiple 12volt outlets, as well as duplex plugs. The two 12 volt outlets above the bed on the passenger side walls hold flex neck LED reading lights and also charge cell phones and lap tops. The under bed storage area has additional led flood lighting and there are two high output LEDs that light outside back doors for loading late night mountain bike finishes. We replaced the dash and door speakers with some upgrades, along with a amp and subwoofer under the passenger swivel seat.