Dedicated PV Load Center

[tallgirl]

I agree... it is a better design. But it is not required by Code. The downside, though many think otherwise, is the "120% rule" then applies, even though there is no branch-circuit load connected to the aggregation panel (except when all available spaces are used disconnecting inverters).

Unless I don't understand your specific objection, the 120% rule is much easier to meet off-grid ("standalone") than grid-tied or grid-interactive.

The bigger challenge, with a standalone system, would be finding a panel with enough slots that didn't have a =low= enough ampacity for that rule to apply. The largest standalone system I've worked on had 150 amps per pole (120/240 single phase), continuous rated output. The 5 second peak was 350 amps. That system supplied 2 residences, a dorm, a several thousand square foot maintenance facility =and= a visitors center.

The DC side was a different matter -- available fault current was over 100,000 amps

 

[Smart $]

Unless I don't understand your specific objection, the 120% rule is much easier to meet off-grid ("standalone") than grid-tied or grid-interactive.

The bigger challenge, with a standalone system, would be finding a panel with enough slots that didn't have a =low= enough ampacity for that rule to apply. ...

The 120% rule does not apply to stand-alone systems.

I got a bit off topic. :blink: