Quote from: lightfoot on Today at 04:11:09 AM

Quote from: Richy_T on Today at 02:54:37 AM

Quote from: HairyMaclairy on Today at 02:25:06 AM

Can recommend. Make sure you have it configured to run when the grid is out as your installer may not think that through.

I recall some noise a while back about PV systems having to power down when the grid was down if they were connected to the grid. I don't recall if there was some kind of exception if you had the correct isolation or not though.

Edit: https://thirdsunsolar.com/residential/does-solar-work-in-a-blackout-third-sun-solar/

Quick summary: A normal grid tie system cannot function without the grid to act as a storage system and modulator. The 60 cycle AC sync signal is provided by the grid, and the inverter syncs to that.

However you can buy a more expensive inverter that can provide its' own 60 cycle reference signal and use a battery pack as a storage/modulator. The "Sunny Island" from SMA is an example of this. When grid power goes down they switch to the batteries and run a portion of your house like a large UPS.

I've got 4 powerwalls and a 16kW array, and I lived the entirety of September 2020 off-grid. This was right after installation and before energy company inspection, so I had to either shut off the grid or shut off the solar.

No issues.