Hello everyone. I have a problem where the power goes out in my housing area once in a while. Its problems with the electric company so there is nothing I can do about it. I have a computer which I use to process information and it has to stay on sometimes for about a week or so processing. When the power goes out it turns off and I have to start the processing all over again. I would just buy a UPS except that the power sometimes stays out for hours (2-3) and the UPS that can last that long cost an arm and a leg. I also heard that if you buy a UPS and change the battery to a car battery or bus battery it still turns off at a specific time, it has a count down included. The charge left in the battery has nothing to do with when it turns off. So I designed this little setup and was hoping you all could go over it and let me know if its right. Someone told me that by the time the battery part kicked in the computer would have already turned off, is this true? Im also trying to spend as little as possible since its something I wont be using often. If I could make the battery charger and/or the inverter that would be something I would be interested in also to learn. I have a couple UPS that are bad which I haven't been able to figure out whats wrong with them. I could always take out the transformers since those seem to we working fine still. But the boards themselves have problems and I suspect one of them has multiple problems. I know how to solder and I have soldered boards before (with instructions). Thanks and hope to hear back.
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