Peak Sun Hours in Taranto, Apulia, Italy
- Solar zone
- Zone 3 (good)
- Best month
- July (7.4)
- Worst month
- December (1.7)
- Climate
- Temperate · 17.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.94 | 2.71 | 2.81 | 0.94 | 8.4 | 82 |
| Feb | 2.74 | 3.79 | 3.25 | 1.29 | 8.9 | 80 |
| Mar | 4.03 | 5.26 | 4.12 | 1.72 | 11.3 | 78 |
| Apr | 5.33 | 6.69 | 4.92 | 2.11 | 14.5 | 74 |
| May | 6.46 | 7.70 | 5.85 | 2.36 | 19.0 | 67 |
| Jun | 7.31 | 8.13 | 7.17 | 2.22 | 24.1 | 59 |
| Jul | 7.42 | 7.87 | 7.90 | 1.91 | 27.6 | 50 |
| Aug | 6.52 | 6.93 | 7.15 | 1.77 | 27.7 | 52 |
| Sep | 4.82 | 5.63 | 5.22 | 1.73 | 22.9 | 63 |
| Oct | 3.38 | 4.16 | 4.19 | 1.34 | 18.3 | 74 |
| Nov | 2.15 | 2.92 | 2.92 | 1.02 | 13.9 | 81 |
| Dec | 1.68 | 2.37 | 2.64 | 0.81 | 9.7 | 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 1.68 kWh/m²/day, 0.77 system efficiency.
About solar in Taranto
Taranto, Italy has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.48 kWh/m²/day, a good solar resource by global standards.
The strongest month in Taranto is July (summer) at 7.42 kWh/m²/day, and the weakest is December (winter) at 1.68 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.
Taranto'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 Taranto?
- Taranto averages 4.48 peak sun hours per day annually, ranging from 1.68 in December to 7.42 in July.
- How many solar panels do I need in Taranto?
- Panel count depends on your daily load. At Taranto's annual average of 4.48 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 Taranto?
- Sizing against Taranto's worst month (December, 1.68 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 Taranto's solar resource compare globally?
- Taranto sits in solar zone 3 out of 5 (where 5 is strongest) at 4.48 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 Taranto?
- Taranto's worst month (December) delivers 1.68 kWh/m²/day — about 23% of the summer peak of 7.42. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Taranto's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Taranto's 4.48 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Taranto?
- At Taranto's latitude (40°), a fixed tilt near 40° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.