Peak Sun Hours in Zeytinburnu, Istanbul, Turkey
- Solar zone
- Zone 3 (good)
- Best month
- July (7.4)
- Worst month
- December (1.4)
- Climate
- Temperate · 15.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.59 | 2.72 | 2.11 | 0.84 | 5.8 | 83 |
| Feb | 2.31 | 3.78 | 2.39 | 1.24 | 6.5 | 82 |
| Mar | 3.55 | 5.24 | 3.20 | 1.73 | 8.6 | 79 |
| Apr | 5.02 | 6.69 | 4.19 | 2.25 | 12.1 | 76 |
| May | 6.31 | 7.70 | 5.23 | 2.60 | 17.4 | 74 |
| Jun | 7.19 | 8.13 | 6.57 | 2.48 | 22.3 | 69 |
| Jul | 7.41 | 7.91 | 7.49 | 2.20 | 25.1 | 66 |
| Aug | 6.45 | 6.98 | 6.64 | 2.04 | 25.5 | 66 |
| Sep | 4.80 | 5.67 | 5.06 | 1.78 | 21.9 | 68 |
| Oct | 3.13 | 4.18 | 3.66 | 1.36 | 16.9 | 76 |
| Nov | 2.03 | 2.94 | 2.82 | 0.97 | 12.3 | 80 |
| Dec | 1.44 | 2.38 | 2.17 | 0.73 | 7.8 | 82 |
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 1.44 kWh/m²/day, 0.77 system efficiency.
About solar in Zeytinburnu
Zeytinburnu, Turkey has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.27 kWh/m²/day, a good solar resource by global standards.
The strongest month in Zeytinburnu is July (summer) at 7.41 kWh/m²/day, and the weakest is December (winter) at 1.44 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.
Zeytinburnu'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 Zeytinburnu?
- Zeytinburnu averages 4.27 peak sun hours per day annually, ranging from 1.44 in December to 7.41 in July.
- How many solar panels do I need in Zeytinburnu?
- Panel count depends on your daily load. At Zeytinburnu's annual average of 4.27 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 Zeytinburnu?
- Sizing against Zeytinburnu's worst month (December, 1.44 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 Zeytinburnu's solar resource compare globally?
- Zeytinburnu sits in solar zone 3 out of 5 (where 5 is strongest) at 4.27 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 Zeytinburnu?
- Zeytinburnu's worst month (December) delivers 1.44 kWh/m²/day — about 19% of the summer peak of 7.41. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Zeytinburnu's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Zeytinburnu's 4.27 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Zeytinburnu?
- At Zeytinburnu's latitude (41°), a fixed tilt near 41° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.