I will certainly give that a try. This is kind of like a packaged unit with a battery very similar to those attached to alarm systems. Do you get "deep cycle" batteries in that format?
This I am sure is part of the problem. Our shedding schedule so far has come every 18 hours.The main problem with UPSs are that they continuously trickle charge the battery, and this kills the battery over time. One should also at least once a month run the UPS off the battery, so that the battery can cycle and keep the electrolyte going. Also for a full charge, you need a 24hour cycle.
At that stage I had a 1KVA ups supported by a 3.5KVA generator. The generator certainly was a Chinese product, that's all I could get at the time. The symptoms you describe are spot on!!With respect to the generator killing UPSs, it is simply too small for the application, making the generator hunt around the 50Hz excessively, making the UPS switch in and out attempting to maintain a constant power to your computers, this hunting, causes excessive voltage to be developed which takes out the UPS protection (MOVS or surge arresters).
If a generator hunts up and down, stop and get a larger one. Just remember up here on the highveld, you lose 40% of the generator capacity because of the thin air, add to it that it will be a Chinese made in whcih the specs have been inflated, and divide the rating by 50% to get a rough idea of its true capacity.
Bugger....
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