In "Adapt solar panels for off grid power in Queensland floods
" I asked it would be possible to charge the battery in a UPS from a solar panel. The idea would be to disconnect a grid connected solar array during an extended blackout and use it to provide some power in a home or emergency centre.
The reason for using a UPS was that they are pre-packaged and self contained, making it easier and safer to set up, than by using separate components.
Since then I have found "Using a UPS for an independent power supply
" from UWA. This describes using a surplus UPS in an independent solar power system. The UPS is used as a low cost DC to AC converter. The original UPS battery is replaced with a larger unit and a standard solar batter controller is used, in place of the charger in the UPS. As well as the web page there is an article
and presentation slides
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