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I was going to say that an inverter that cannot backfeed the grid is an
enormous economic waste of investment because when one is generating say,
8 kW during mid day and one's house is only drawing say 400 Watts, then
the rest of the 8kW solar investement is giving NOTHING for its value.
Even with
On 5/26/20 10:55 PM, Alan Arrison via EV wrote:
Sounds dangerous and possibly illegal. There is no inverter that can
supply the actual power you are using and not back-feed the grid.
It is technically possible, all you would need is a current sensor on
the main house feed. If the current
On 5/27/20 1:01 PM, Jay Summet via EV wrote:
On 5/26/20 10:55 PM, Alan Arrison via EV wrote:
Sounds dangerous and possibly illegal. There is no inverter that can
supply the actual power you are using and not back-feed the grid.
It is technically possible, all you would need is a current
> With modern electronics you could react very quickly if the draw
> dropped (current flow started to go negative) and essentially never
> backfeed the grid.
Such a project is already developed and it's Open Source!
http://openenergymonitor.org/
I was involved in this project in the very early
Jay Summet via EV wrote:
It is technically possible, all you would need is a current sensor on
the main house feed. If the current is going in, your inverter would
start adding current to the house wiring until the current flow reached
zero. With modern electronics you could react very quickly
Why is this an inverter problem ? If there's no load, then there's no
current through the inverter. I'm not sure what the effect is on the
solar cells, themselves, but it seems that's where the problem ends up.
Regardless, I assume it is not too bad for the cells since they have to
be designed
Willie via EV wrote:
BTW, I believe someone mentioned that the not produced power when an
inverter "cuts back" must be dissipated somewhere as heat. I don't
believe that is the case; I believe the inverter can just not produce
the available power with no heat generation.
I agree. It would be a
Ah hA! You beat me to it. I was thinking of an optical mouse to sense
direction too!
Clever. But again, the only answer to solar economy is simply to get a
Permit and a NET meter. Done
Bob
-Original Message-
From: EV On Behalf Of Mr. Sharkey via EV
Sent: Wednesday, May 27, 2020 3:33
Just to clarify... ALL GT inverters use MPPT tracking which means they
will produce maximum AC current into the grid at its maximum rated
capacity at all times (up to what the solar panels are currently
producing). GT inverters are *current sources* that will push that
current into the load (grid)
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I disagree. When you make a $10,000 investment in a solar array, any sun
that falls on it and does not give you retail value in return for the
electricity is truly a wasted economic value. With GT, there is no such
thing as wasted, or excess power, its all converted to $$$ on your
electric bill.
Robert Bruninga via EV wrote:
I disagree. When you make a $10,000 investment in a solar array, any sun
that falls on it and does not give you retail value in return for the
electricity is truly a wasted economic value.
I guess it's wasted if you consider money as "waste". And, if your
utility
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