clett, thanks for the 4m/kwhr. I think I pay about 12 cents/ now, but it varies with the price of natural gas(despite the fact that we have a nuclear plant just 20 miles upriver-apparently most of the nuke power goes to industry under long term contract) I really can't complain about 12 cent electricity.

So the" new" lithium batteries can be repeatedly drained deeply-to maybe 20%?

Thanks,Charlie