Peak Sun Hours in Curitiba, Paraná, Brazil
- Solar zone
- Zone 3 (good)
- Best month
- December (5.5)
- Worst month
- June (2.8)
- Climate
- Temperate · 17.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.48 | 8.47 | 3.21 | 2.81 | 21.4 | 83 |
| Feb | 5.32 | 7.87 | 3.46 | 2.56 | 21.4 | 83 |
| Mar | 4.82 | 6.92 | 3.71 | 2.22 | 20.6 | 84 |
| Apr | 4.03 | 5.70 | 3.72 | 1.77 | 18.7 | 83 |
| May | 3.14 | 4.64 | 3.39 | 1.39 | 15.3 | 85 |
| Jun | 2.83 | 4.07 | 3.41 | 1.19 | 14.0 | 86 |
| Jul | 3.14 | 4.32 | 3.86 | 1.19 | 13.6 | 84 |
| Aug | 3.91 | 5.16 | 4.41 | 1.33 | 14.8 | 81 |
| Sep | 4.22 | 6.19 | 3.55 | 1.77 | 16.5 | 81 |
| Oct | 4.65 | 7.40 | 3.10 | 2.28 | 18.3 | 82 |
| Nov | 5.43 | 8.39 | 3.60 | 2.64 | 19.2 | 81 |
| Dec | 5.54 | 8.64 | 3.41 | 2.78 | 20.9 | 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 2.83 kWh/m²/day, 0.77 system efficiency.
About solar in Curitiba
Curitiba, Brazil has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.38 kWh/m²/day, a good solar resource by global standards.
The strongest month in Curitiba is December (summer) at 5.54 kWh/m²/day, and the weakest is June (winter) at 2.83 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the June value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Curitiba'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 Curitiba?
- Curitiba averages 4.38 peak sun hours per day annually, ranging from 2.83 in June to 5.54 in December.
- How many solar panels do I need in Curitiba?
- Panel count depends on your daily load. At Curitiba's annual average of 4.38 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 Curitiba?
- Sizing against Curitiba's worst month (June, 2.83 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 Curitiba's solar resource compare globally?
- Curitiba sits in solar zone 3 out of 5 (where 5 is strongest) at 4.38 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 Curitiba?
- Curitiba's worst month (June) delivers 2.83 kWh/m²/day — about 51% of the summer peak of 5.54. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Curitiba's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Curitiba's 4.38 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Curitiba?
- At Curitiba's latitude (25°), a fixed tilt near 25° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.