Power Curtailment
When a grid operator instructs generators (including rooftop solar) to reduce output because supply exceeds demand. Increasing in regions with high solar penetration during spring midday hours.
Why It Matters
Curtailment means your solar system may be told to reduce exports, losing potential income. Battery storage avoids this by absorbing midday excess for evening self-use.
Related Terms
Curtailment
The intentional reduction of renewable energy output below what the resource could produce, typically because the grid cannot absorb the excess generation.
Duck Curve
A graph of net electricity demand that shows a deep midday dip (from solar overproduction) and a steep evening ramp (as solar drops off and demand peaks), shaped like a duck.
Battery Storage
A system that stores excess solar energy for use when the sun isn't shining, providing backup power during outages.