Hardware
What is inverter clipping vs an export limit on SA home solar?
Clipping is the inverter refusing more DC power than it can convert (DC/AC oversizing); an export limit is a settings cap on kW sent to the grid. Both flatten the production curve for different reasons — read the monitoring graph before you blame panels.
Updated 27 October 2026 · Ballpark ranges — not a formal quote, credit decision or legal advice.
Answer first: Open a sunny-day power graph. A flat AC line at the inverter rating while DC input is higher is clipping; a flat line at your approved export kW while the house could absorb more may be export limiting — DC/AC oversizing · export limit · monitoring · zero-export.
Side-by-side
| Clipping | Export limit | |
|---|---|---|
| Cause | DC > inverter AC capacity | Settings / metro approval |
| Where seen | Inverter AC output ceiling | Grid export channel |
| Typical fix | Accept, or larger inverter / less DC | Correct setpoint / approval |
SSEG · export vs self-use · panels & inverters.
Season-test the system in the month that hurts
July nights and January heat expose weak designs. Schedule a deliberate outage test in winter and a temperature check in summer. Fix what those tests show while the installer still answers the phone under warranty.
Screenshots from a mild March afternoon are not a test.
Clipping vs export limit — two different rands
DC clipping happens when array watts exceed inverter AC capacity in peak sun. Export limiting throttles AC output so you do not push past a metro setpoint. Both waste potential yield, but export limiting is a compliance choice; oversized DC/AC is a design choice. Ask the quote to show expected clipped kWh/year and the export-limit setpoint separately.
- East-west roofs clip less aggressively than pure north at noon.
- Batteries absorb mid-day surplus that would otherwise clip or export.
- Zero-export homes should size DC for self-use, not brochure peak — DC/AC · zero-export · east-west.