Peak Sun Hours in Foggia, Apulia, Italy
- Solar zone
- Zone 3 (good)
- Best month
- July (7.3)
- Worst month
- December (1.6)
- Climate
- Temperate · 16.7°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.77 | 2.65 | 2.84 | 0.83 | 7.6 | 81 |
| Feb | 2.59 | 3.74 | 3.29 | 1.20 | 8.1 | 79 |
| Mar | 3.84 | 5.21 | 3.94 | 1.69 | 10.8 | 76 |
| Apr | 5.17 | 6.67 | 4.68 | 2.15 | 14.3 | 71 |
| May | 6.28 | 7.72 | 5.51 | 2.47 | 19.1 | 64 |
| Jun | 7.08 | 8.18 | 6.69 | 2.38 | 24.3 | 56 |
| Jul | 7.26 | 7.93 | 7.60 | 2.03 | 27.5 | 49 |
| Aug | 6.39 | 6.97 | 6.96 | 1.83 | 27.5 | 50 |
| Sep | 4.61 | 5.61 | 5.01 | 1.72 | 22.2 | 63 |
| Oct | 3.22 | 4.11 | 4.16 | 1.27 | 17.7 | 72 |
| Nov | 2.02 | 2.84 | 3.03 | 0.92 | 12.9 | 80 |
| Dec | 1.56 | 2.30 | 2.75 | 0.71 | 8.8 | 81 |
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 1.56 kWh/m²/day, 0.77 system efficiency.
About solar in Foggia
Foggia, Italy has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.32 kWh/m²/day, a good solar resource by global standards.
The strongest month in Foggia is July (summer) at 7.26 kWh/m²/day, and the weakest is December (winter) at 1.56 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.
Foggia'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 Foggia?
- Foggia averages 4.32 peak sun hours per day annually, ranging from 1.56 in December to 7.26 in July.
- How many solar panels do I need in Foggia?
- Panel count depends on your daily load. At Foggia's annual average of 4.32 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 Foggia?
- Sizing against Foggia's worst month (December, 1.56 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 Foggia's solar resource compare globally?
- Foggia sits in solar zone 3 out of 5 (where 5 is strongest) at 4.32 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 Foggia?
- Foggia's worst month (December) delivers 1.56 kWh/m²/day — about 21% of the summer peak of 7.26. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Foggia's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Foggia's 4.32 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Foggia?
- At Foggia's latitude (41°), a fixed tilt near 41° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.