zanydroid
Solar Wizard
I assume you’re saying this in the sense that the orientation should only matter in terms of clipping. Different orientation would be ideal from clipping perspective.Are all existing panels and the new ones going too be same orientation?
Orienting to optimize for late afternoon may provide more value.
SolarEdge inverters are likely a dime a dozen if you’re clipping.
Really the big constraint here is PG&E NEM rules and whether you will fall off the roof.
If you decide to do this guerilla style you should at least follow structural rules and setback/access path rules. Then you only get in trouble with PG&E