DIY appliance backup power from repurposed 48v power tools.
I dearly love my Snapper 48v mower and power tools, but they don’t offer an inverter that can run off them like some other power tool companies. So, when I saw a cheap power tool and the batteries go on sale, I figured I’d invalidate some warranties and reconfigure them into a home-build power system. Could I just buy a set of tools that includes an inverter? Sure. But where’s the fun in that? Also, I’ve already got a bunch in this line for my electric mower and I’m very happy with the performance.
Because of end-of-season clearance, I was able to get the tool, two batteries and a charger for about $250. The trimmer was $50, the charger $25, and the batteries on sale for $85 each. This puts me in similar price range with other battery systems, but allows me to swap out my 48v 5Ah (240Wh) batteries as needed. I’ve wanted to build this system for a while using the batteries I use in my electric mower and chainsaw, so I figured this sale was a good opportunity to try building a back up system.
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