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I want to make a solar charger for tool batteries. I'm thinking plug a standard AC dual 5 amp 20v battery charger into an inverter charged via a solar battery bank. Enough to charge four batteries during the day. That's not in the budget so I'm going to start small with just one battery at a time (600watts?). Maybe two batteries a day if I can afford it.

Who here has built such a battery bank? What advice do you have? What handy online calculators do you recommend? Is there a spreadsheet available that is better than a calculator? In the past I would have looked for those myself but search engines are totally useless now. Would you rather have one big battery hooked up to the inverter or a bank of smaller batteries in series or parallel?

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[-] mortalic@lemmy.world 1 points 3 days ago

This won't work for most tool chargers as they are 110-240v usually.

I know for a fact Dewalt, Milwaukee, and Makita offer 12 volt versions of the chargers for their power tool batteries.

[-] FauxPseudo@lemmy.world 1 points 3 days ago

But not Hercules. Which is my default after my Makita stuff got stolen out of a work truck.

this post was submitted on 02 Oct 2024
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