Todd has the right answer. The AC2 input will not sell to the grid as you
would not want to sell to the generator.

On Mon, Dec 19, 2022 at 12:21 PM Foxfire Energy via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> I’m thinking the simple fix is to just make sure the breaker between the
> grid and inverter is off when you’re running the generator.. JMHO..
>
> Sent from my iPhone
>
> On Dec 19, 2022, at 10:52 AM, Tump via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>  I have neve heard that but I would connect the utility to the AC1 input
> as the window is quite narrow then the grid. The GTI was a piss poor way
> for trace to regulate “sell” current would ramp up & back down all day
> long. NOT necessary. BUT then again that old duffer; SH  probably has more
> brain cells left then I do.
>
> On Dec 19, 2022, at 10:27 AM, Chad Waits via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> I thought the SW needed a Grid Tie Interface (GTI)
> <https://www.altestore.com/store/media/pdfs/xantrex/Grid%20Tie%20Interface%20(GTI)%20Data%20Sheet.pdf>
> to keep current from leaking out to the grid even if you didn;t want to
> sell to them...
>
> Chad Waits
> President - Net Zero Solar
> 945 W. Silverlake, Tucson, AZ 85713
> Cell: (520) 270-4873
>
>
>
> On Mon, Dec 19, 2022 at 8:21 AM David Palumbo via RE-wrenches <
> re-wrenches@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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