Peak Sun Hours in Reggio nell'Emilia, Emilia-Romagna, Italy
- Solar zone
- Zone 2 (moderate)
- Best month
- July (6.8)
- Worst month
- December (1.3)
- Climate
- Temperate · 13.1°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 1.49 | 2.28 | 2.56 | 0.72 | 2.7 | 87 |
| Feb | 2.31 | 3.41 | 3.27 | 1.03 | 3.7 | 83 |
| Mar | 3.54 | 4.94 | 3.65 | 1.63 | 7.6 | 77 |
| Apr | 4.68 | 6.45 | 3.93 | 2.19 | 11.9 | 73 |
| May | 5.79 | 7.61 | 4.47 | 2.70 | 16.6 | 67 |
| Jun | 6.67 | 8.02 | 5.46 | 2.77 | 21.9 | 60 |
| Jul | 6.82 | 7.75 | 6.25 | 2.45 | 24.8 | 53 |
| Aug | 5.84 | 6.73 | 5.63 | 2.16 | 24.4 | 54 |
| Sep | 4.29 | 5.32 | 4.52 | 1.75 | 18.8 | 65 |
| Oct | 2.63 | 3.73 | 3.14 | 1.24 | 13.7 | 77 |
| Nov | 1.55 | 2.47 | 2.37 | 0.77 | 8.0 | 86 |
| Dec | 1.27 | 1.95 | 2.49 | 0.58 | 3.7 | 87 |
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 1.27 kWh/m²/day, 0.77 system efficiency.
About solar in Reggio nell'Emilia
Reggio nell'Emilia, Italy has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 3.91 kWh/m²/day, a moderate solar resource by global standards.
The strongest month in Reggio nell'Emilia is July (summer) at 6.82 kWh/m²/day, and the weakest is December (winter) at 1.27 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.
Given the moderate resource, Reggio nell'Emilia installations typically oversize panels or combine solar with another source (grid, generator, hydro) for reliability.
FAQ
- What are the peak sun hours in Reggio nell'Emilia?
- Reggio nell'Emilia averages 3.91 peak sun hours per day annually, ranging from 1.27 in December to 6.82 in July.
- How many solar panels do I need in Reggio nell'Emilia?
- Panel count depends on your daily load. At Reggio nell'Emilia's annual average of 3.91 kWh/m²/day, a 5 kWh/day load needs roughly 5 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Reggio nell'Emilia?
- Sizing against Reggio nell'Emilia's worst month (December, 1.27 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 Reggio nell'Emilia's solar resource compare globally?
- Reggio nell'Emilia sits in solar zone 2 out of 5 (where 5 is strongest) at 3.91 kWh/m²/day — moderate 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 Reggio nell'Emilia?
- Reggio nell'Emilia's worst month (December) delivers 1.27 kWh/m²/day — about 19% of the summer peak of 6.82. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Reggio nell'Emilia's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Reggio nell'Emilia's 3.91 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Reggio nell'Emilia?
- At Reggio nell'Emilia's latitude (45°), a fixed tilt near 45° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.