On 16 November 2013 07:01, meekerdb <meeke...@verizon.net> wrote:

> The main problem is just size.  I considered designing an energy storage
> system to be used with home, rooftop PVs.  I looked around for something
> heavy that could be lifted up to store energy.  My car.  It weighs about
> 2600lb.  Suppose I lifted it ten feet (high as the roof).  I've stored
> 26,000ft*lb = 10Wh  :-(
>
> At last, a use for cars that doesn't involve carbon emissions!

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