[RE-wrenches] Old Trace SW inverter connected to the grid.
Sindelar Solar
Allan at sindelarsolar.com
Mon Dec 19 13:58:56 PST 2022
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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