Comment on This was the first result on Google

artvabas@lemmy.world ⁨3⁩ ⁨months⁩ ago

• TheBest@midwest.social ⁨3⁩ ⁨months⁩ ago

  At least with the 12v to 120v it just won’t work instead of exploding

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  • nexussapphire@lemm.ee ⁨3⁩ ⁨months⁩ ago

    And it turns out to be an ac motor in the compressor causing the fridge and the battery to short out If it stalls on a coil. The ac motor burns up with the battery. The electronic, water dispenser, and the ice maker would probably be happy assuming it’s a full bridge rectifier otherwise polarity would matter but most likely wouldn’t break it.

    I’m not an engineer just a guess.

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• Quadhammer@lemmy.world ⁨3⁩ ⁨months⁩ ago

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

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  • seppoenarvi@lemmy.world ⁨3⁩ ⁨months⁩ ago

    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.

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    • The_Tired_Horizon@lemmy.world ⁨3⁩ ⁨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)

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  • nexussapphire@lemm.ee ⁨3⁩ ⁨months⁩ ago

    Probably lost about 10% or more to heat.

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    • Atemu@lemmy.ml ⁨3⁩ ⁨months⁩ ago

      10% worse efficiency > no refrigerator

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      • nexussapphire@lemm.ee ⁨3⁩ ⁨months⁩ ago

        Maybe refrigerator until the battery catches on fire!

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    • ikidd@lemmy.world ⁨3⁩ ⁨months⁩ ago

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

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