Peak Sun Hours in Adapazarı, Sakarya, Turkey
- Solar zone
- Zone 3 (good)
- Best month
- July (7.1)
- Worst month
- December (1.5)
- Climate
- Temperate · 14.3°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.65 | 2.81 | 2.18 | 0.88 | 5.1 | 81 |
| Feb | 2.43 | 3.91 | 2.64 | 1.26 | 6.2 | 78 |
| Mar | 3.51 | 5.39 | 3.27 | 1.69 | 8.4 | 75 |
| Apr | 4.82 | 6.85 | 4.02 | 2.20 | 11.9 | 73 |
| May | 5.89 | 7.86 | 4.77 | 2.55 | 16.8 | 74 |
| Jun | 6.86 | 8.29 | 6.22 | 2.45 | 21.1 | 72 |
| Jul | 7.12 | 8.06 | 7.16 | 2.20 | 23.5 | 71 |
| Aug | 6.34 | 7.13 | 6.69 | 1.95 | 24.0 | 72 |
| Sep | 4.75 | 5.80 | 5.21 | 1.70 | 20.7 | 72 |
| Oct | 3.18 | 4.29 | 3.98 | 1.29 | 16.1 | 76 |
| Nov | 2.19 | 3.05 | 3.39 | 0.92 | 11.4 | 76 |
| Dec | 1.54 | 2.47 | 2.40 | 0.76 | 7.0 | 79 |
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 1.54 kWh/m²/day, 0.77 system efficiency.
About solar in Adapazarı
Adapazarı, Turkey has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.19 kWh/m²/day, a good solar resource by global standards.
The strongest month in Adapazarı is July (summer) at 7.12 kWh/m²/day, and the weakest is December (winter) at 1.54 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.
Adapazarı'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 Adapazarı?
- Adapazarı averages 4.19 peak sun hours per day annually, ranging from 1.54 in December to 7.12 in July.
- How many solar panels do I need in Adapazarı?
- Panel count depends on your daily load. At Adapazarı's annual average of 4.19 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 Adapazarı?
- Sizing against Adapazarı's worst month (December, 1.54 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 Adapazarı's solar resource compare globally?
- Adapazarı sits in solar zone 3 out of 5 (where 5 is strongest) at 4.19 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 Adapazarı?
- Adapazarı's worst month (December) delivers 1.54 kWh/m²/day — about 22% of the summer peak of 7.12. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Adapazarı's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Adapazarı's 4.19 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Adapazarı?
- At Adapazarı's latitude (41°), a fixed tilt near 41° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.