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Australia struggling with oversupply of solar power
(www.abc.net.au)
This is a most excellent place for technology news and articles.
You're not LOSING anything if it's capturing already excess energy, which would by its nature be lost if not used at the time of generation
Neither solar panels, nor hydrogen generators are free. If you need to build extra panels and hydrogen generators, you are making the infrastructure more expensive, consequently raising electricity prices. Or hydrogen prices if you use it as fuel instead of power storage.