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The US electrical grid is in desperate need of upgrades, watchdog warns
(www.engadget.com)
This is a most excellent place for technology news and articles.
People still often use lead acid for solar storage as energy density is less of a concern when you are just stacking them on a shelf.
Sadly, I am space constrained so no lead acid batteries for me. Having the ability to actually maintain my own batteries would have its perks though.