Solar Panel Tilt Angle & Energy Yield
Calculate latitude-optimized solar panel tilt angles, seasonal winter/summer adjustments, and NREL PVWatts insolation yields.
NREL PVWATTS SOLAR INSOLATION ENGINE
Solar PV Tilt Angle & Energy Yield Calculator
OPTIMAL TILT: 34.2° (TRUE SOUTH 180°)
Array System Capacity (kW DC):8.0 kW DC
Annual Fixed Optimal Tilt:
26.1°
Winter Max Tilt (Adjusted):
41.1°
Estimated Annual Solar Yield:
11,680 kWh / Year
Est. Annual Electricity Savings: $1,635 / Year (US EIA Avg)
Frequently Asked Questions
What is the optimal tilt angle for solar panels in the US?
For year-round fixed solar arrays, the optimal tilt angle roughly equals your latitude times 0.76 plus 3.1° (typically 28° to 45° across the US). Panels should face True South (180° Azimuth) in the Northern Hemisphere.
Should solar panel tilt angle be adjusted between summer and winter?
Adjustable ground mounts benefit from seasonal tilt tweaks: steepen tilt to Latitude + 15° in winter (when the sun is lower on the horizon) and flatten tilt to Latitude - 15° in summer.
How much energy does an 8kW DC solar system produce annually?
In high-insolation US states like Arizona or Texas, an 8kW DC solar array yields 11,500 kWh to 14,000 kWh annually; in northern states like Washington or New York, it produces 9,000 kWh to 10,500 kWh.