Path-Q Solar

What financial impact can curtailment have on a solar system with limited export capacity?

Answer

Curtailment reduces the energy the system can use or export, lowering bill savings or export revenue while most system costs remain. Its impact depends on how often the export limit binds, how much energy is curtailed, and whether storage or load shifting can capture that energy.

Key points

  • Estimate curtailed kilowatt-hours by time period rather than applying a blanket annual percentage.
  • Value curtailed energy according to whether it would otherwise have served on-site load or been exported.
  • Check whether inverter controls, export limits, or utility instructions cause the curtailment.
  • Model storage, flexible loads, or a smaller array as possible ways to reduce losses.

What it depends on

  • Export limit and interconnection arrangement
  • Interval production and consumption
  • Import and export valuation
  • Battery, load-shifting, and control capabilities

Risks and trade-offs

  • A larger array may have lower marginal value if it frequently exceeds the export limit.
  • Storage can recover some production but adds capital cost, conversion losses, degradation, and replacement risk.
  • Curtailment estimates can be highly sensitive to load timing and control settings.

Information you may need

  • Approved export capacity and control requirements
  • Interval load and production model
  • Expected curtailment frequency and duration
  • Battery and flexible-load alternatives

Your next step

What to do next

Request an interval simulation showing curtailed energy and annual value under the approved export limit, with and without storage or load shifting.

Path-Q

Find the right next step

Answer a few questions and we’ll narrow your options.

Loading…

SQ02703