Peak Sun Hours in São José dos Campos, São Paulo, Brazil
- Solar zone
- Zone 3 (good)
- Best month
- February (5.7)
- Worst month
- June (3.3)
- Climate
- Temperate · 19.7°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.54 | 8.34 | 3.65 | 2.52 | 22.2 | 83 |
| Feb | 5.74 | 7.87 | 4.48 | 2.24 | 22.2 | 83 |
| Mar | 5.12 | 6.97 | 4.25 | 2.04 | 21.4 | 85 |
| Apr | 4.46 | 5.82 | 4.49 | 1.65 | 19.9 | 84 |
| May | 3.59 | 4.80 | 4.05 | 1.39 | 17.2 | 82 |
| Jun | 3.31 | 4.27 | 4.18 | 1.19 | 16.5 | 80 |
| Jul | 3.51 | 4.53 | 4.44 | 1.14 | 16.2 | 76 |
| Aug | 4.15 | 5.36 | 4.74 | 1.31 | 17.6 | 71 |
| Sep | 4.38 | 6.29 | 3.83 | 1.71 | 19.8 | 69 |
| Oct | 4.93 | 7.40 | 3.62 | 2.16 | 21.1 | 73 |
| Nov | 5.30 | 8.23 | 3.59 | 2.45 | 20.9 | 79 |
| Dec | 5.62 | 8.47 | 3.73 | 2.59 | 21.9 | 82 |
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 3.31 kWh/m²/day, 0.77 system efficiency.
About solar in São José dos Campos
São José dos Campos, Brazil has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.64 kWh/m²/day, a good solar resource by global standards.
The strongest month in São José dos Campos is February (summer) at 5.74 kWh/m²/day, and the weakest is June (winter) at 3.31 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.
São José dos Campos'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 São José dos Campos?
- São José dos Campos averages 4.64 peak sun hours per day annually, ranging from 3.31 in June to 5.74 in February.
- How many solar panels do I need in São José dos Campos?
- Panel count depends on your daily load. At São José dos Campos's annual average of 4.64 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 São José dos Campos?
- Sizing against São José dos Campos's worst month (June, 3.31 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 São José dos Campos's solar resource compare globally?
- São José dos Campos sits in solar zone 3 out of 5 (where 5 is strongest) at 4.64 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 São José dos Campos?
- São José dos Campos's worst month (June) delivers 3.31 kWh/m²/day — about 58% of the summer peak of 5.74. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect São José dos Campos's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. São José dos Campos's 4.64 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in São José dos Campos?
- At São José dos Campos's latitude (23°), a fixed tilt near 23° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.