Canadian solar tilt and sun hour calculator powered by NASA data (2002–2022) for accurate off-grid planning.
Use the “Optimal Tilt Angle” shown for your city. For winter, increase by ~15°; for summer, decrease by ~15°.
GHI (Global Horizontal Irradiance) measures total solar radiation on a flat surface in kWh/m². PSH (Peak Sun Hours) translates that energy into the number of equivalent full-sun hours per day.
If feasible, yes. Seasonal adjustment improves winter energy capture and reduces required battery capacity by improving system efficiency.
Once you find your city’s PSH, use it to calculate your solar panel wattage, battery capacity, and inverter rating. You can link directly to our other calculators for precise results.
All solar radiation and tilt data are derived from NASA POWER (2002–2022) datasets, specifically calibrated for Canadian latitudes.
Yes. If your roof pitch is fixed, compare it to your location’s optimal tilt. If they differ significantly, consider using adjustable mounts or ground-mounted systems.
The data represents long-term 20-year averages. Real-world values may vary by ±10% depending on shading, local weather, and snow cover.
Absolutely. Although designed for off-grid planning, the PSH and GHI values also apply to grid-tie or hybrid setups to estimate annual production.
Use the “Compare Locations” toggle above to view up to three cities side by side. It’s ideal for relocation, cabin planning, or system expansion decisions.
Scroll down to the “Seasonal Insights” section to see how monthly GHI and PSH values fluctuate and how to plan your winter backup accordingly.