Re: Where/How to find an engineer to design AC-coupled system
This has the feel of a philosophical dispute. If you connect a totally separate battery backup system to your house, then you will have a situation where you sell all of your excess AC production from PV back to the grid, but part of your load on the GTI and grid will be going to a battery charger. No problem there, and none of POCOs business as long as you use an NEC compliant transfer switch setup to go to battery during a power outage.
Originally Posted by SteveF
Now compare that to the situation in which some of your solar PV goes directly to charge your batteries. From the POCO point of view, in letter and in spirit, the result is just the same.
What could be different is that POCO does not want you to collect any rebate or incentive based on that part of the system cost which is attributable to the backup function. In that case, if you still use exactly the same components for which the rebate was paid and do not try to collect a rebate on new equipment you add to get the battery backup, you should still be OK.
The question of what happens if you stop using the equipment that you got the rebate for is one I will leave to the lawyers.
Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.