In grid-tied microgrids with an export limit, islandable systems, or fully off-grid systems, the solar array can produce more than the load at a point where the energy storage cannot be charged any higher. At this point solar power must be curtailed so as not to over power the. Export limits, designed to maintain grid stability and prevent overloads, often mean that valuable solar energy goes unused. This article outlines a strategic approach to navigate these limits, focusing on the sophisticated capabilities of hybrid inverters, the precision of module-level power. Curtailment refers to the intentional reduction of power output from a solar PV system—even when the system could generate more electricity—due to grid constraints, interconnection limits, oversupply conditions, or operational restrictions. For maximizing the annual yield, people often install an over-sized PV system (high DC:AC ratio), and accept some energy loss during the best hours of the year (peak-shaving).
[PDF Version]