Even if a camper is as good as brand new, not everything always fits like a glove. A pure gas heater from Truma may have too little heat output and too much gas consumption, the 80 Ah AGM battery simply doesn't have enough juice and the 1600 watt coffee machine only works with shore power. We can start retrofitting the Inverter in the camper for self-sufficient 230 V can help. This also includes an upgrade to a lithium battery and an additional diesel parking heater so that the caravan is cosy and warm!