[RE-wrenches] Old Trace SW inverter connected to the grid.

[Sindelar Solar]

Todd is correct. This solution is simple and works. You'll still want a 
switch or breaker on the input.
Allan

On 12/19/2022 9:13 AM, Todd Cory via RE-wrenches wrote:
>
> If the grid is wired to AC2, then the inverter can charge off off that 
> source but not sell to it.
> Todd
>
>     On Mon, Dec 19, 2022 at 8:21 AM David Palumbo via RE-wrenches
>     <re-wrenches at lists.re-wrenches.org> wrote:
>
>         Wrenches,
>
>         I have been retired from doing solar installs for 10 years now
>         and I am reaching out for help as to recommending a solution
>         to an old do-it-yourself customers question.
>
>         His solar system that was formerly off-grid and is now using
>         grid power instead of a back up generator.
>
>         He had/has no intention of doing a net-metered system. Just
>         trying to reduce dependance on a fossil fuel genset during our
>         mostly sunless Vermont winters.
>
>         He says that he brought in power a few years ago to run their
>         expanding maple sugaring operation located next to their
>         house. At that time they ran a 115Vac circuit (grid power)
>         over to their house and connected grid power into AC Hot In
>         terminal #! in their Trace SW 2512. This is correct as I see
>         terminal #2 is labeled for generator power.
>
>         He has the Trace programmed for float mode  not sell mode.
>
>         Their local utility was working on the line nearby on the main
>         road and noticed a small amount of current flowing into the
>         grid and figured out where it was coming from. The utility did
>         not immediately shut him down. Just told him to correct the
>         problem. He is asking me for advice.
>
>         My first inclination is to separate the grid power completely
>         from the inverter power and to feed both power sources into a
>         double pole double throw transfer switch. What other options
>         should be considered.
>
>         Thanks in advance and happy holidays,
>
>         Dave Palumbo
>
>         Formerly > Independent Power & Light
>
>         Hyde Park, VT
>
>         802-371-8678 voice or text
>
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