On Dec 15, 2016, at 4:12 AM, jim bell <[1]jdb10987@yahoo.com> wrote:

   From: John Newman <[2]jnn@synfin.org>
   >When you can build a new home with solar panels all over it and tesla
   battery
   > arrays in the basement to keep you going at night, it's just possible
   to get to
   > the point where you receive a check from the utility company every
   month, rather than a bill ....
   >I think, and hope, this is the future of power in homes.
   >John
   Why should a house-installed solar installation use batteries at all?
   Batteries are big, heavy, inefficient, have a limited lifetime, and are
   made of expensive and potentially toxic materials, which can sometimes
   explode with little or no warning.

   So you don't waste all those KW accumulated during the day. Modern
   advanced batteries (like the ones sold by tesla) perform quite
   extraordinarily well.

   I think of the AC power-grid as an infinite-capacity, indefinite
   lifetime, virtually 100% efficient, "battery".

   But it's not a battery. There is lots and lots of carbon being burned
   down to keep that grid humming.

               Jim Bell

References

   1. mailto:jdb10987@yahoo.com
   2. mailto:jnn@synfin.org