30–60
Ah/day: compressor fridge in summer
≈ 10
hot meals per 450 g gas canister
2 kW
induction hob draw — the threshold that decides the inverter
3 d
minimum dry stores, off the cold chain
The debate is settled less on comfort than on what each solution demands of the rest of the van.
A 12 V compressor fridge draws 30 to 60 Ah/day in summer — often the van's biggest item after heating. Three levers act before you even change the appliance:
And the thermoelectric cooler remains the classic false friend: cheap, it draws continuously for a modest temperature differential — acceptable running off the alternator while driving, ruinous at a wild camp.
Real food autonomy is measured by how many days you can hold out if the fridge stops. Hence the simple rule: three days of food that needs neither refrigeration nor long cooking — precooked pulses, tinned goods, starches, nuts.
The rest is a matter of rotation: these stores are not a museum, they get eaten and replaced along with ordinary shopping. An emergency stock you never touch expires precisely on the day it was meant to serve.
One last point, often overlooked: cooking water. Boiling pasta or rice uses drinking water that the water balance has to account for. On a long stay, favouring cooking methods that don't require draining changes the arithmetic more than you would expect.
A compressor cool box is a fridge: what counts is the technology, not the name. The real dividing line separates compression (which regulates to a setpoint and stops once reached) from thermoelectric (which draws continuously for a limited differential against ambient). For use at a wild camp, only the first holds up.
In practice, no. The roughly 2 kW draw requires a bank able to deliver high current without voltage sag, which lead-acid handles poorly and pays for in lifespan. On an existing lead-acid installation, gas remains the coherent answer.
The usual order of magnitude for two people cooking daily is around one 6 kg bottle per month, cooking alone. That figure climbs fast if gas also serves hot water or supplementary heating — two uses to be counted separately, not added by guesswork.