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Existing California solar customers may get blindsided with net metering cuts
(pv-magazine-usa.com)
This is a most excellent place for technology news and articles.
If you want to encourage purchasing of storage then contribute to making that an easier task. Charging for overproducing is spiteful and mostly encourages resentment. I wouldn't blame these people for finding a cheap way to avoid the "charge" (and if there is a law that prevents that, it is disgusting).