Ctay005
Member
- Location
- Orem, Utah, USA
I'm currently working on a system where we are going to install a small sub-panel beside the MSP in order to make room for the PV breaker. We will be taking 20A and 30A breakers from the Main and hook them up in this sub-panel as well as the 30A of solar and then have a breaker in the Main to protect it all. The plan reviewer said that the Sub-panel Disconnect (OCPD) and wires need to be sized based on the 20A and 30A breakers as well as the 30A of solar. But my thought was that the 30A of solar doesn't need to be included in these calculations because the maximum draw in this panel will be 50A and whatever the Solar isn't powering will be drawn through the grid and if there is no draw then the solar will backfeed as normal to the MSP.
Am I correct in my thinking or do the feeders and OCPD need to be sized based off of 80A (20 + 30 +30 (solar)) like the AHJ said?
Am I correct in my thinking or do the feeders and OCPD need to be sized based off of 80A (20 + 30 +30 (solar)) like the AHJ said?