On 07/13/2019 07:44, Jay Summet via EV wrote:
Also, the PowerWall is able to "fake" the grid well enough that grid
tie inverters will "powerup" and start to feed power back into what
they believe is the "grid" but is instead the powerwall. (which
accepts the power so that the voltage does not climb too high).
I believe that when the powerwall is fully charged (can accept no more
power) it shifts the frequency of the power from 60 to some other
value (62 hz?) that is outside of the standards, which causes the grid
tie inverters to stop feeding current into "the grid".
So in this way a PowerWall attached to a house with a grid tie
inverter (either a single wall mount or microinverters on each panel)
can use the solar power to refill in the power outage as well as to
share the load from the house when the sun is out.
My solar installation vendor is just starting to sell / lease the Tesla
Powerwall. The advertising mailing (take that for whatever it's worth)
implies without the technical part similar to the way Jay describes it.
I have not contacted them yet, but am interested to see what they are
offering... They were specifically talking about situations where the
electric utility cuts power to reduce bush fire risk and the PowerWall
as a way to stay up and operating.
--
73
-------------------------------------
Jim Walls - K6CCC
[email protected]
Ofc: 818-548-4804
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