Peak Sun Hours in Valladolid, Castille and León, Spain
- Solar zone
- Zone 3 (good)
- Best month
- July (7.6)
- Worst month
- December (1.7)
- Climate
- Temperate · 12.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.82 | 2.77 | 2.76 | 0.91 | 3.9 | 85 |
| Feb | 2.88 | 3.94 | 3.84 | 1.29 | 4.7 | 79 |
| Mar | 4.16 | 5.52 | 4.28 | 1.89 | 7.7 | 73 |
| Apr | 5.38 | 7.03 | 4.58 | 2.50 | 10.7 | 69 |
| May | 6.55 | 8.09 | 5.56 | 2.76 | 14.7 | 63 |
| Jun | 7.29 | 8.49 | 6.46 | 2.75 | 19.7 | 55 |
| Jul | 7.63 | 8.29 | 7.85 | 2.29 | 22.4 | 48 |
| Aug | 6.67 | 7.33 | 7.00 | 2.16 | 22.2 | 47 |
| Sep | 5.15 | 5.88 | 5.76 | 1.84 | 18.4 | 55 |
| Oct | 3.39 | 4.33 | 4.32 | 1.37 | 13.3 | 69 |
| Nov | 2.14 | 3.02 | 3.25 | 0.98 | 7.4 | 82 |
| Dec | 1.66 | 2.43 | 2.85 | 0.81 | 4.3 | 85 |
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 1.66 kWh/m²/day, 0.77 system efficiency.
About solar in Valladolid
Valladolid, Spain has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.56 kWh/m²/day, a good solar resource by global standards.
The strongest month in Valladolid is July (summer) at 7.63 kWh/m²/day, and the weakest is December (winter) at 1.66 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.
Valladolid's solar conditions are well within the range where off-grid PV is a straightforward engineering exercise with standard-sized arrays and lithium batteries.
FAQ
- What are the peak sun hours in Valladolid?
- Valladolid averages 4.56 peak sun hours per day annually, ranging from 1.66 in December to 7.63 in July.
- How many solar panels do I need in Valladolid?
- Panel count depends on your daily load. At Valladolid's annual average of 4.56 kWh/m²/day, a 5 kWh/day load needs roughly 4 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Valladolid?
- Sizing against Valladolid's worst month (December, 1.66 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 Valladolid's solar resource compare globally?
- Valladolid sits in solar zone 3 out of 5 (where 5 is strongest) at 4.56 kWh/m²/day — good 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 Valladolid?
- Valladolid's worst month (December) delivers 1.66 kWh/m²/day — about 22% of the summer peak of 7.63. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Valladolid's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Valladolid's 4.56 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Valladolid?
- At Valladolid's latitude (42°), a fixed tilt near 42° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.