Peak Sun Hours in Eskişehir, Eskişehir, Turkey
- Solar zone
- Zone 3 (good)
- Best month
- July (7.6)
- Worst month
- December (1.7)
- Climate
- Temperate · 11.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.94 | 3.05 | 2.39 | 1.06 | -0.1 | 85 |
| Feb | 2.81 | 4.15 | 2.95 | 1.47 | 2.1 | 79 |
| Mar | 3.96 | 5.61 | 3.63 | 1.87 | 5.7 | 72 |
| Apr | 5.17 | 7.04 | 4.21 | 2.38 | 10.1 | 66 |
| May | 6.19 | 8.00 | 4.96 | 2.67 | 15.3 | 65 |
| Jun | 7.15 | 8.44 | 6.57 | 2.48 | 19.3 | 62 |
| Jul | 7.59 | 8.21 | 7.96 | 2.08 | 22.2 | 58 |
| Aug | 6.70 | 7.27 | 7.22 | 1.90 | 22.4 | 58 |
| Sep | 5.23 | 6.00 | 5.94 | 1.69 | 18.3 | 61 |
| Oct | 3.58 | 4.49 | 4.49 | 1.37 | 12.9 | 67 |
| Nov | 2.46 | 3.25 | 3.78 | 0.98 | 6.8 | 73 |
| Dec | 1.72 | 2.67 | 2.56 | 0.87 | 1.6 | 83 |
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 1.72 kWh/m²/day, 0.77 system efficiency.
About solar in Eskişehir
Eskişehir, Turkey has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.54 kWh/m²/day, a good solar resource by global standards.
The strongest month in Eskişehir is July (summer) at 7.59 kWh/m²/day, and the weakest is December (winter) at 1.72 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.
Eskişehir'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 Eskişehir?
- Eskişehir averages 4.54 peak sun hours per day annually, ranging from 1.72 in December to 7.59 in July.
- How many solar panels do I need in Eskişehir?
- Panel count depends on your daily load. At Eskişehir's annual average of 4.54 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 Eskişehir?
- Sizing against Eskişehir's worst month (December, 1.72 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 Eskişehir's solar resource compare globally?
- Eskişehir sits in solar zone 3 out of 5 (where 5 is strongest) at 4.54 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 Eskişehir?
- Eskişehir's worst month (December) delivers 1.72 kWh/m²/day — about 23% of the summer peak of 7.59. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Eskişehir's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Eskişehir's 4.54 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Eskişehir?
- At Eskişehir's latitude (40°), a fixed tilt near 40° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.