Hey everyone! I'm new to the solar scene and have a question about roof configurations. I'm replacing my roof and considering adding a patio roof that will be connected to my existing roofs at a valley. My solar setup didn't include this, so I'll have to move some panels. I have two roofs: one is east-facing and the other is south-facing, with the new patio roof also facing south but at a lesser tilt than the second roof. The panels moving from the second roof will still face south but with differing tilts. The panels from the first roof will switch orientations from east to south. All the panels on the first roof are wired in the same string, while the second roof's panels are on a different string. Is this a bad idea? Could it cause issues either structurally or electrically, like lowering power significantly? The new patio roof will be metal and the one over the patio will be transparent panels, but the moved panels will stay on the metal sections. Thanks for your advice!
2 Answers
Different tilts and orientations may not be the best approach, especially depending on how your panels are wired. If they’re all in a series configuration, the panel with less sunlight can drag down the whole string’s performance. If you’re moving all the panels from roof 2 to the patio roof, that mismatch could really hurt efficiency. The same applies to roof 1—only moving some panels can also affect them negatively. A diagram would have been super helpful to visualize this!
It really depends on your MLPE (Module Level Power Electronics). If you're using microinverters, you're in a good spot because they work independently, extracting the most power from each panel. So, if you’ve got different tilts and orientations, that setup can handle it much better than traditional string configurations. Power optimizers are another option if you’re not going with microinverters, but they might not be as effective under these circumstances.
Totally agree! Using microinverters or DC optimizers can really help manage varying conditions.