Best 100Ah Lithium Battery for a Caravan in Australia

Why 100Ah lithium is the sweet spot

A 100Ah LiFePO4 battery gives you close to 100Ah of usable power, about double what you can safely take from a 100Ah AGM. That's enough to run a compressor fridge, LED lights, a water pump and phone charging for a night or two without the engine running.

It also weighs around 10 to 12kg, less than half a typical 100Ah AGM, which matters when you're watching your caravan's payload.

What to look for

Built-in BMS rated for your loads. Check the continuous discharge rating (100A is common) covers your inverter and fridge together.
Low-temperature charge protection or self-heating if you camp in alpine areas or frosty inland mornings.
Bluetooth monitoring so you can check charge level and cell health from your phone.
Dimensions and terminal type. Measure your battery box or mounting spot before you buy.
Australian warranty and support, ideally from a seller with a local address.

How long will 100Ah last?

A typical 12V compressor fridge averages 1 to 2A over a day, so roughly 24 to 48Ah per day. Add lights and charging and most couples use 40 to 70Ah a day. Pair a 100Ah battery with 200W or more of solar and you can stay put for days in good sun.