HI Jay,
The Fronius line, primo or symo have that capability. You need the smart meter
to measure current flow at point of interconnection. The tricky bit is what
happens when a big load suddenly turns off. There will always be a small flow
of energy across the meter for a second or two while the system reacts and
curtails the pv array. HECO was fine with this limited, momentary export of
energy.These residential systems typically have very low performance factors,
as the PV peaks around noon, when a typical load profile peaks morning and
evening. So you end up curtailing most of your pv production. In a commercial
application though, zero export can work really well, if you size PV to midday
loads.
-Wes Kennedy
On Wednesday, August 28, 2019, 09:51:40 PM MDT, Jay <[email protected]>
wrote:
Hi Chris,
So it doesn’t sound like what I’m after.
I’m looking for a GT WO batteries hooked to the main panel just like normal
but having communication from the main ( could be reading smart meter or using
sensors) to allow power to be consumed in the house but no export to the grid
by reducing power from the GT inverter. I know it’s done in other countries,
India for example.
No sub panel, no dedicated loads panel, no back up, just a normal GT system for
self consumption with of course the grid suppling what ever the GT inverter
isn’t.
Guessing from comments so far I’m SOL.
Jay
On Aug 28, 2019, at 6:28 PM, Chris Sparadeo <[email protected]> wrote:
Jay,
My understanding is that the Outback SkyBox is capable of supplying power to AC
loads (what they call “micro grid”) without needing grid input or a DC storage
system. Kind of like the SMA SunnyBoy secure power supply, only on a larger
scale. However, depending on the electrical demands of the loads being
energized, there is potential that solar PV production would not supply
necessary power in the daytime...Also, the system would essentially de-energize
during low irradiance/night times.
Best,
Chris
On Wed, Aug 28, 2019 at 9:19 PM Chris Sparadeo <[email protected]> wrote:
Jay,
My understanding is that the Outback SkyBox is capable of supplying power to AC
loads (what they call “micro grid”) without needing grid input or a DC storage
system. Kind of like the SMA SunnyBoy secure power supply, only on a large
scale. However, depending on the electrical demands of the loads being
energized, there is potential that solar PV production would not supply
necessary power in the daytime...Also, the system would essentially de-energize
during low irradiance/night times.
Best,
Chris
On Wed, Aug 28, 2019 at 9:03 PM Jay <[email protected]> wrote:
are there any products out there that can do a grid tie w/o batteries but no
sell back to the
grid?
Thx
Jay
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Catamount Solar, LLC
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