Peak Sun Hours in Albacete, Castille-La Mancha, Spain
- Solar zone
- Zone 3 (good)
- Best month
- July (7.7)
- Worst month
- December (2.2)
- Climate
- Temperate · 14.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.51 | 3.20 | 4.33 | 0.95 | 4.7 | 79 |
| Feb | 3.37 | 4.32 | 4.67 | 1.29 | 5.7 | 73 |
| Mar | 4.53 | 5.80 | 4.93 | 1.81 | 8.9 | 67 |
| Apr | 5.70 | 7.18 | 5.12 | 2.39 | 12.2 | 63 |
| May | 6.78 | 8.12 | 6.05 | 2.60 | 16.6 | 55 |
| Jun | 7.65 | 8.45 | 7.35 | 2.42 | 22.3 | 46 |
| Jul | 7.73 | 8.19 | 7.84 | 2.19 | 25.6 | 39 |
| Aug | 6.70 | 7.30 | 6.81 | 2.09 | 25.1 | 43 |
| Sep | 5.15 | 6.00 | 5.29 | 1.93 | 20.1 | 57 |
| Oct | 3.81 | 4.61 | 4.75 | 1.44 | 15.0 | 66 |
| Nov | 2.68 | 3.41 | 4.30 | 1.00 | 8.6 | 75 |
| Dec | 2.22 | 2.83 | 4.14 | 0.82 | 5.3 | 80 |
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 2.22 kWh/m²/day, 0.77 system efficiency.
About solar in Albacete
Albacete, Spain has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.9 kWh/m²/day, a good solar resource by global standards.
The strongest month in Albacete is July (summer) at 7.73 kWh/m²/day, and the weakest is December (winter) at 2.22 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.
Albacete'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 Albacete?
- Albacete averages 4.9 peak sun hours per day annually, ranging from 2.22 in December to 7.73 in July.
- How many solar panels do I need in Albacete?
- Panel count depends on your daily load. At Albacete's annual average of 4.9 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 Albacete?
- Sizing against Albacete's worst month (December, 2.22 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 Albacete's solar resource compare globally?
- Albacete sits in solar zone 3 out of 5 (where 5 is strongest) at 4.9 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 Albacete?
- Albacete's worst month (December) delivers 2.22 kWh/m²/day — about 29% of the summer peak of 7.73. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Albacete's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Albacete's 4.9 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Albacete?
- At Albacete's latitude (39°), a fixed tilt near 39° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.