Peak Sun Hours in João Pessoa, Paraíba, Brazil
- Solar zone
- Zone 4 (excellent)
- Best month
- November (6.8)
- Worst month
- June (4.6)
- Climate
- Equatorial · 26.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 6.31 | 7.56 | 4.82 | 2.46 | 27.5 | 71 |
| Feb | 6.26 | 7.55 | 4.57 | 2.47 | 27.6 | 73 |
| Mar | 6.17 | 7.35 | 4.82 | 2.30 | 27.6 | 75 |
| Apr | 5.55 | 6.78 | 4.64 | 2.03 | 27.2 | 79 |
| May | 4.97 | 6.14 | 4.41 | 1.85 | 26.4 | 82 |
| Jun | 4.56 | 5.84 | 4.11 | 1.74 | 25.3 | 84 |
| Jul | 4.77 | 6.01 | 4.40 | 1.74 | 24.5 | 84 |
| Aug | 5.58 | 6.55 | 5.13 | 1.88 | 24.5 | 80 |
| Sep | 6.17 | 7.08 | 5.11 | 2.15 | 25.3 | 76 |
| Oct | 6.55 | 7.51 | 5.35 | 2.28 | 26.4 | 71 |
| Nov | 6.78 | 7.63 | 5.85 | 2.28 | 27.2 | 68 |
| Dec | 6.53 | 7.50 | 5.39 | 2.41 | 27.6 | 69 |
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 4.56 kWh/m²/day, 0.77 system efficiency.
About solar in João Pessoa
João Pessoa, Brazil sits near the equator, where day length is stable year-round and the sun passes close to overhead. Its annual peak sun hours average 5.85 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in João Pessoa is November (spring) at 6.78 kWh/m²/day, and the weakest is June (winter) at 4.56 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.
João Pessoa'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 João Pessoa?
- João Pessoa averages 5.85 peak sun hours per day annually, ranging from 4.56 in June to 6.78 in November.
- How many solar panels do I need in João Pessoa?
- Panel count depends on your daily load. At João Pessoa's annual average of 5.85 kWh/m²/day, a 5 kWh/day load needs roughly 3 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in João Pessoa?
- Sizing against João Pessoa's worst month (June, 4.56 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 João Pessoa's solar resource compare globally?
- João Pessoa sits in solar zone 4 out of 5 (where 5 is strongest) at 5.85 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.
- Why doesn't solar output vary much by month in João Pessoa?
- Near the equator, day length is nearly constant year-round and the sun stays close to overhead. In João Pessoa, monthly PSH ranges just from 4.56 to 6.78 kWh/m²/day — variance is driven by wet-season cloud cover, not day length.
- What tilt angle works best for panels in João Pessoa?
- At latitude 7°, panels in João Pessoa work best at a low tilt (roughly 7°) or horizontal. Tracking mounts add little benefit this close to the equator.
- How does the wet season affect solar output in João Pessoa?
- Equatorial wet seasons reduce output through cloud cover, not day length. João Pessoa's worst month (June) still delivers 4.56 kWh/m²/day — design against this value for reliable year-round off-grid use.