Definition
An east-west solar layout mounts modules in alternating east-facing and west-facing rows or sub-arrays, producing a flatter daily energy profile than south-facing arrays. Common on carports, low-tilt commercial roofs, and NEM 3.0 residential design.
Key Takeaways
- East-west layout = alternating east + west facing modules.
- Flatter daily profile than south-facing.
- Common in carports and NEM 3.0 residential.
- Requires separate MPPTs per orientation.
- Yields ~5–10% less than ideal south-facing but more space efficient.
Frequently Asked Questions
3 commonly searched questions about East-West Layout.
What is east-west layout?
Modules mounted in alternating east-facing and west-facing rows. Produces flatter daily power profile than south-facing only.
When use east-west?
Carports (architectural), low-tilt commercial roofs (GCR optimization), NEM 3.0 residential (capture morning + evening peak rates), space-constrained roofs.
Required design?
Separate MPPTs for east vs. west strings (4–8% loss if combined on single MPPT).
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