Path-Q Solar
What system design works best when one roof section is shaded and another is clear?
Answer
The design should electrically separate the shaded and clear sections as much as practical. Possible approaches include separate inverter inputs, multiple MPPT channels, microinverters, or optimizers; the best choice depends on shade severity, layout, equipment cost, and whether the sections have different orientations.
Key points
- Avoid placing shaded and unshaded panels in the same string when that materially reduces output.
- A shade analysis should estimate when and how much each section is affected.
- Separate electrical treatment does not eliminate energy lost where sunlight is blocked.
What it depends on
- Shade timing, extent, and seasonal change
- Panel orientations and string arrangement
- Inverter input and MPPT capabilities
- Cost, monitoring, maintenance, and expansion preferences
Risks and trade-offs
- Additional inverters or module electronics may increase cost and service complexity.
- Moving panels to the clear section may reduce total capacity if space is limited.
- A design optimized for current shade may change if trees or nearby structures change.
Information you may need
- Time-based shade assessment
- Roof-plane dimensions and orientations
- Candidate equipment designs and prices
- Desired monitoring and battery features
Your next step
What to do next
Request a production comparison for separate MPPT strings, microinverters, and optimizers, using the same panel layout and shade assumptions.
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SQ00472