CRITERIA NEEDED FOR THIS INTERCONNECTION

The example to the right shows what your setup might look like for this type of interconnection. Depicted is a meter/main combo. Not shown is the panel labeling indicating spots which will accept tandems. A designer would likely decide to consolidate their PV breaker on a quad with the top breaker farthest away from the main breaker, however, special attention will be required. Notice that there are feeders coming from the bottom lugs of this panel feeding a sub panel. These feeders need to be protected in some way.

This interconnection has the following requirements that need to be met before it can be considered:

1. Sub Panel feeding from the bottom lugs of the MSP has an existing main breaker.

2. There are 2 available stabs to accommodate our PV breaker in the MSP.

   • If you the panel is full but the load center allows tandems you can consider this condition met.

3. There must be no code violations present in and around the MSP. 

   • If there is a plan in place to resolve code violations, then  you can consider this condition met.

4. There must be sufficient available backfeed for the amount of PV we will be landing in this load center.

In this case, the interior sub panel is already protected by a main breaker rated for 200A.