Peak Sun Hours in Londrina, Paraná, Brazil
- Solar zone
- Zone 4 (excellent)
- Best month
- December (6.2)
- Worst month
- June (3.5)
- Climate
- Temperate · 21.0°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.95 | 8.29 | 4.10 | 2.62 | 23.8 | 82 |
| Feb | 5.78 | 7.78 | 4.27 | 2.41 | 23.8 | 80 |
| Mar | 5.46 | 6.92 | 4.79 | 2.04 | 23.2 | 79 |
| Apr | 4.80 | 5.80 | 5.18 | 1.55 | 21.6 | 77 |
| May | 3.78 | 4.77 | 4.52 | 1.29 | 18.1 | 79 |
| Jun | 3.45 | 4.24 | 4.55 | 1.13 | 16.7 | 81 |
| Jul | 3.74 | 4.50 | 4.85 | 1.15 | 16.4 | 77 |
| Aug | 4.57 | 5.33 | 5.56 | 1.22 | 18.0 | 72 |
| Sep | 5.05 | 6.22 | 4.95 | 1.63 | 20.6 | 69 |
| Oct | 5.44 | 7.32 | 4.31 | 2.18 | 22.6 | 73 |
| Nov | 6.10 | 8.20 | 4.73 | 2.48 | 23.1 | 74 |
| Dec | 6.16 | 8.43 | 4.43 | 2.62 | 24.0 | 77 |
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 3.45 kWh/m²/day, 0.77 system efficiency.
About solar in Londrina
Londrina, Brazil has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 5.02 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Londrina is December (summer) at 6.16 kWh/m²/day, and the weakest is June (winter) at 3.45 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.
Londrina'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 Londrina?
- Londrina averages 5.02 peak sun hours per day annually, ranging from 3.45 in June to 6.16 in December.
- How many solar panels do I need in Londrina?
- Panel count depends on your daily load. At Londrina's annual average of 5.02 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 Londrina?
- Sizing against Londrina's worst month (June, 3.45 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 Londrina's solar resource compare globally?
- Londrina sits in solar zone 4 out of 5 (where 5 is strongest) at 5.02 kWh/m²/day — excellent 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 Londrina?
- Londrina's worst month (June) delivers 3.45 kWh/m²/day — about 56% of the summer peak of 6.16. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Londrina's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Londrina's 5.02 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Londrina?
- At Londrina's latitude (23°), a fixed tilt near 23° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.