Peak Sun Hours in Reggio Calabria, Calabria, Italy
- Solar zone
- Zone 3 (good)
- Best month
- July (7.5)
- Worst month
- December (1.8)
- Climate
- Temperate · 18.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.10 | 3.02 | 3.04 | 0.98 | 11.2 | 77 |
| Feb | 2.91 | 4.09 | 3.36 | 1.36 | 10.9 | 77 |
| Mar | 4.23 | 5.51 | 4.20 | 1.80 | 12.6 | 77 |
| Apr | 5.52 | 6.83 | 4.86 | 2.24 | 14.9 | 76 |
| May | 6.70 | 7.79 | 5.95 | 2.44 | 18.6 | 71 |
| Jun | 7.45 | 8.20 | 7.18 | 2.25 | 23.3 | 65 |
| Jul | 7.55 | 7.96 | 7.80 | 2.00 | 26.5 | 61 |
| Aug | 6.66 | 7.07 | 7.00 | 1.88 | 27.0 | 61 |
| Sep | 4.95 | 5.81 | 5.04 | 1.84 | 23.8 | 66 |
| Oct | 3.56 | 4.40 | 4.21 | 1.42 | 20.4 | 72 |
| Nov | 2.35 | 3.20 | 3.15 | 1.08 | 16.4 | 75 |
| Dec | 1.83 | 2.66 | 2.82 | 0.87 | 12.8 | 76 |
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 1.83 kWh/m²/day, 0.77 system efficiency.
About solar in Reggio Calabria
Reggio Calabria, Italy has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.65 kWh/m²/day, a good solar resource by global standards.
The strongest month in Reggio Calabria is July (summer) at 7.55 kWh/m²/day, and the weakest is December (winter) at 1.83 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.
Reggio Calabria'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 Reggio Calabria?
- Reggio Calabria averages 4.65 peak sun hours per day annually, ranging from 1.83 in December to 7.55 in July.
- How many solar panels do I need in Reggio Calabria?
- Panel count depends on your daily load. At Reggio Calabria's annual average of 4.65 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 Reggio Calabria?
- Sizing against Reggio Calabria's worst month (December, 1.83 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 Calabria's solar resource compare globally?
- Reggio Calabria sits in solar zone 3 out of 5 (where 5 is strongest) at 4.65 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 Reggio Calabria?
- Reggio Calabria's worst month (December) delivers 1.83 kWh/m²/day — about 24% of the summer peak of 7.55. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Reggio Calabria's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Reggio Calabria's 4.65 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Reggio Calabria?
- At Reggio Calabria's latitude (38°), a fixed tilt near 38° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.