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Cheap UPS solution?
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this post was submitted on 15 Aug 2023
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It’s 12V so I guess you can Frankenstein something with a car battery. But honestly this sounds more like a LTT video than something I would trust not to burn my house down.
You'd want to use a deep cycle (sometimes labeled "marine") battery, not a car battery. Car batteries can put out a shit ton of power for a very short time but their total capacity is pretty low.
Also you still want AGM, Gel or something else sealed like that. You don't want a Flooded Lead Acid battery charging/being trickle charged inside your house.
Op could also swap to LiFePO4