this post was submitted on 18 Mar 2024
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[–] Quadhammer@lemmy.world 9 points 9 months ago (2 children)

So just slap a power inverter in there somewhere and you're good to go

[–] seppoenarvi@lemmy.world 4 points 9 months ago (1 children)

To answer the original question, a fridge requires quite a lot of power to operate. Could be 500W. There's also power loss from the voltage conversion, so you need a battery and an inverter that are able to provide more than that - let's say 600W. Car batteries are typically 12V lead-acid batteries. 600W means 50 amps from the battery. That's a huge current. Lead-acid batteries can handle high currents for a short period of time, but high currents have a negative effect on the battery capacity. So my guess is that the fridge could work for a very short period of time.

[–] The_Tired_Horizon@lemmy.world 4 points 9 months ago

^^THIS^^

Plus to add that modern kitchen stuff like that will throw on the compressor to cool the unit down with up to a surge of 1200w. Usually for 2-3 minutes as it engages the cooling pumps and moves the refrigerant.

I've run fridge freezer units off battery a few times (deep cycle lead acid, lithium/LFP)

[–] nexussapphire@lemm.ee 1 points 9 months ago (2 children)

Probably lost about 10% or more to heat.

[–] Atemu@lemmy.ml 4 points 9 months ago (1 children)

10% worse efficiency > no refrigerator

[–] nexussapphire@lemm.ee 0 points 9 months ago

Maybe refrigerator until the battery catches on fire!

[–] ikidd@lemmy.world 2 points 9 months ago

Inverters have gotten pretty efficient. I have one for my house that's 97.1% efficient.