Peak Sun Hours in A Coruña, Galicia, Spain
- Solar zone
- Zone 2 (moderate)
- Best month
- July (6.3)
- Worst month
- December (1.3)
- Climate
- Temperate · 13.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.42 | 2.37 | 1.92 | 0.81 | 9.0 | 89 |
| Feb | 2.32 | 3.54 | 2.77 | 1.21 | 8.8 | 86 |
| Mar | 3.52 | 5.14 | 3.33 | 1.78 | 10.2 | 84 |
| Apr | 4.85 | 6.76 | 4.14 | 2.27 | 11.6 | 82 |
| May | 5.81 | 7.89 | 4.73 | 2.61 | 13.8 | 81 |
| Jun | 6.16 | 8.32 | 4.99 | 2.67 | 16.5 | 79 |
| Jul | 6.25 | 8.04 | 5.38 | 2.55 | 18.4 | 77 |
| Aug | 5.52 | 7.05 | 5.14 | 2.24 | 19.0 | 76 |
| Sep | 4.43 | 5.58 | 4.73 | 1.81 | 17.8 | 77 |
| Oct | 2.79 | 3.95 | 3.24 | 1.33 | 15.1 | 81 |
| Nov | 1.67 | 2.64 | 2.28 | 0.89 | 11.4 | 86 |
| Dec | 1.30 | 2.04 | 2.11 | 0.70 | 9.5 | 88 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
Add appliances
- Add an appliance to size a system.
Sizing
- Daily load
- 0.00 kWh
- Panel wattage
- 0 W
- Panel count (400W modules)
- 0
- Battery bank
- 0.0 kWh
Sizing against worst-month PSH of 1.30 kWh/m²/day, 0.77 system efficiency.
About solar in A Coruña
A Coruña, Spain has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 3.84 kWh/m²/day, a moderate solar resource by global standards.
The strongest month in A Coruña is July (summer) at 6.25 kWh/m²/day, and the weakest is December (winter) at 1.3 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the December value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Given the moderate resource, A Coruña installations typically oversize panels or combine solar with another source (grid, generator, hydro) for reliability.
FAQ
- What are the peak sun hours in A Coruña?
- A Coruña averages 3.84 peak sun hours per day annually, ranging from 1.3 in December to 6.25 in July.
- How many solar panels do I need in A Coruña?
- Panel count depends on your daily load. At A Coruña's annual average of 3.84 kWh/m²/day, a 5 kWh/day load needs roughly 5 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in A Coruña?
- Sizing against A Coruña's worst month (December, 1.3 kWh/m²/day) with 2 days of autonomy at 80% depth of discharge, a 5 kWh/day load needs about a 12.5 kWh battery bank.
- How does A Coruña's solar resource compare globally?
- A Coruña sits in solar zone 2 out of 5 (where 5 is strongest) at 3.84 kWh/m²/day — moderate by global standards. For reference, top-tier desert sites average ~6.5 and high-latitude cities around 2.5 kWh/m²/day.
- How much does winter reduce solar output in A Coruña?
- A Coruña's worst month (December) delivers 1.3 kWh/m²/day — about 21% of the summer peak of 6.25. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect A Coruña's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. A Coruña's 3.84 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in A Coruña?
- At A Coruña's latitude (43°), a fixed tilt near 43° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.