[RE-wrenches] Enphase Off-Grid

[MDElectricSolar]

We have the same situation with a Tesla power wall three, we are going to try to trick it with a Honda inverter generator, 7000 W.
Michael D Nelson
MD Electric & Solar, Inc.
707-684-0064 mobile
707-884-1862 office
www.mdelectricsolar.com
www.facebook.com/mdelectricandsolar


> On Oct 15, 2025, at 2:27 PM, Jason Szumlanski via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> 
> I know Enphase now allows full off-grid, but I read their tech brief, and it requires a generator to be present for commissioning, I believe. Has anyone commissioned one of these systems off-grid?
> 
> The reason I ask is that I have a new home build, and the utility meter won't be set until January or later. I could plausibly install the microinverters and batteries and get the system up and running to power the house during construction, prior to having a utility source. That should qualify them for the tax credit.
> 
> If the off-grid mode can't be set up without a generator, I suppose it would be possible to "trick" the system by getting it commissioned with a generator on the AC input of the System Controller with the profile set to no export. That's not ideal, probably not advisable, and certainly not supported, but... as long as the generator source is clean enough to look like the grid...
> 
> I reached out to Enphase to see if the generator requirement can be waived, which is the ideal scenario. 
> 
> I would be interested in hearing about any general experiences with Enphase in full off-grid use. I can't imagine there are that many out there yet.
> 
> 
> Jason Szumlanski
> Principal Solar Designer | Florida Solar Design Group
> NABCEP Certified Solar Professional (PVIP)
> Florida State Certified Solar Contractor CVC56956
> Florida Certified Electrical Contractor EC13013208
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