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Debunking The "Dirty" Solar Panels And Battery Myth
(cleantechnica.com)
This is a most excellent place for technology news and articles.
In small scale old truck/semi batteries are pretty good energy storage solution. Not good enough for round the year use in transportation, but quite usefull in small scale energy storage. (I have a set of 10 attached to solar panels at summer cottage. Enough to run 12V lighting, fridge, fans and tv through the (short) night).
Are you talking the lead acid starter batteries? Sure, you can repurpose those for offgrid storage, but I'm talking ongrid, industrial scale.