[RE-wrenches] Enphase Off-Grid

[MD Electric & Solar]

Well, we were told it would void the PW3 warranty so we chickened out.

On Wed, Oct 15, 2025 at 7:26 PM david quattro <david at quattrosolar.com>
wrote:

> Very cool gentlemen, please let us know how it goes. I find this very
> intriguing.
>
>
>
> On Wed, Oct 15, 2025 at 6:38 PM MDElectricSolar via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> 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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-- 
Michael D Nelson
MD Electric & Solar Inc.
Office: 707-412-3181
Cell: 707-684-0064
www.mdelectricsolar.com
www.facebook.com/mdelectricandsolar
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