Caravan lithium battery or home solar battery in Australia?

A 12.8 V 100 Ah LiFePO4 caravan house battery holds 1.28 kWh nominally. A household solar battery is a separate installation, sized for household loads and subject to different equipment and installation requirements.

For a caravan, a fridge’s daily Wh and the DC-to-DC charger model matter more than fridge nameplate wattage. For a home battery discount, the Clean Energy Regulator lists a 5 kWh nominal minimum plus equipment and installer conditions. A 1.28 kWh caravan battery is below that nominal minimum.