Definition
Inverter clipping is the design-intended energy loss when DC array power exceeds inverter AC nameplate capacity. The MPPT operates intentionally off the maximum power point, capping output at AC capacity. Typically 0.5–4% annual energy loss for ILR 1.20–1.40.
Key Takeaways
- Clipping = energy lost when DC power > inverter AC capacity.
- Result of intentional ILR > 1.0 design.
- 0.5–4% annual loss for typical ILR 1.20–1.40.
- Different from curtailment (external).
- PVsyst loss diagram quantifies clipping per project.
Frequently Asked Questions
4 commonly searched questions about Inverter Clipping.
What is inverter clipping?
Energy lost when DC array power > inverter AC capacity. MPPT moves off the peak to cap input. Designed behavior, not a fault.
How much clipping is normal?
0.5–2% at ILR 1.20. 2–4% at ILR 1.35. 5–8% at ILR 1.50+. Site-dependent.
Is clipping the same as curtailment?
No. Clipping: internal design choice (DC > AC). Curtailment: external utility-forced reduction.
Does PVsyst show clipping?
Yes — separate line in the loss diagram. Designers optimize ILR to balance clipping vs. inverter cost.
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