Seasonal Solar Production
The variation in solar output across seasons due to changing sun angle, day length, and weather patterns. US systems typically produce 20-40% of annual energy in summer vs 10-15% in winter.
Why It Matters
If your utility uses annual net metering true-up, summer overproduction can offset winter underproduction. Battery sizing should account for winter being the weakest production period.
Related Tools
Related Terms
Net Metering True-Up
An annual settlement date when your utility calculates whether you have a net credit or balance from 12 months of net metering. Excess credits may roll over, be paid out at avoided cost, or expire.
Peak Sun Hours
The equivalent number of hours per day when solar irradiance averages 1,000 watts per square meter. Varies by location.
Tilt Angle
The angle of solar panels relative to horizontal. Optimal tilt often equals your latitude for year-round production.