Probably not what you want to hear, but microinverters might work depending on the module.
Jason On Tue, Mar 31, 2015 at 1:40 PM, August Goers <[email protected]> wrote: > Hi Wrenches, > > > > We commonly upgrade old failed out-of-warranty grid tied inverters as part > of our O&M business. Anyway, we’ve been using standard transformer based > isolated inverters just like the good old days. However, as the industry > progresses it seems like transformer based inverters are going the way of > the dodo. Does anyone know of a code compliant way to install a > transformerless ungrounded inverter on an old PV array with USE-2 wire? The > problem is that the modules from just a few years ago all or mostly had > USE-2 and I can’t find a way to meet NEC 690.35(D)(3). > > > > Best, > > > > August > > > > August Goers > > Luminalt Energy Corporation > > o:415.641.4000 > > [email protected] > > >
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