This is me turning a cheap “Ultra” UPS with I believe 7AH capacity, good for maybe 3 minutes of power, into a huge battery reserve. I put 2 80AH Nautilus deep cycle marine batteries on this thing and test it. I’m estimating it will give me at least 2 hours of uptime on my machine with no power supplied. All that was used were the 2 80AH deep cycle batteries, about 18 feet of 10 gauge stranded copper wire, a few wire caps, electrical tape, a wrench, wire cutters and a dremel just for making the hole in the plastic.
Video Rating: 4 / 5

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