[RE-wrenches] 120/240 Delta

[David Quattro]

Even if some amalgamation of hardware could play along, personally I
wouldn’t do it.  It’s out of the ballpark with all major brands. Your
highest voltage will be 120v, thus your amps would be high. Sounds like a
warranty nightmare. I think that restaurant needs to upgrade their electric



On Wed, Mar 25, 2026 at 8:54 AM Michael Morningstar via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Wrenches,
> I have a customer that has asked me to provide their restaurant with PV
> and battery back up. Easy-peasy or so I thought. It turns out that the
> service that supplies the restaurant is being fed by two phases from a
> 120/240V transformer. The service entrance conductors are direct burial and
> run under a large paved parking lot, so there's no changing that
> arrangement. I'm at a loss as what I can do here. I don't believe that
> something like a Sol-Ark 18k is going to play nice with two legs 120
> degrees out of phase? The 30K definitely needs all three phases so a 240
> Delta/208 WYE isn't going to help? I don't even think there are
> micro-inverters or string inverters available to give them just straight
> grid-tied and no BB. Are there any solutions that I'm unaware of?
> Michael
> ?
> --
>
> Michael Morningstar
>
>
> Morningstar Electric Inc
>
> PO Box 1494
>
> Mount Shasta, CA 96067
>
> 530-921-0560
>
> CSLB 1116835
>
> mjmorningstar at gmail.com
>
>
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