Peak Sun Hours in Juiz de Fora, Minas Gerais, Brazil
- Solar zone
- Zone 3 (good)
- Best month
- February (5.8)
- Worst month
- June (3.5)
- Climate
- Temperate · 20.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.66 | 8.24 | 3.33 | 2.85 | 23.2 | 83 |
| Feb | 5.76 | 7.85 | 3.97 | 2.59 | 23.1 | 84 |
| Mar | 5.07 | 6.99 | 3.54 | 2.41 | 22.4 | 85 |
| Apr | 4.43 | 5.94 | 3.95 | 1.90 | 21.0 | 85 |
| May | 3.69 | 4.99 | 3.83 | 1.58 | 18.5 | 84 |
| Jun | 3.51 | 4.50 | 4.15 | 1.36 | 17.8 | 82 |
| Jul | 3.77 | 4.75 | 4.63 | 1.28 | 17.5 | 78 |
| Aug | 4.36 | 5.56 | 4.83 | 1.46 | 18.8 | 73 |
| Sep | 4.71 | 6.42 | 4.20 | 1.78 | 20.7 | 70 |
| Oct | 4.98 | 7.41 | 3.34 | 2.35 | 22.3 | 72 |
| Nov | 4.89 | 8.04 | 2.54 | 2.72 | 22.1 | 79 |
| Dec | 5.38 | 8.26 | 3.02 | 2.75 | 22.9 | 83 |
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 3.51 kWh/m²/day, 0.77 system efficiency.
About solar in Juiz de Fora
Juiz de Fora, Brazil has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 4.68 kWh/m²/day, a good solar resource by global standards.
The strongest month in Juiz de Fora is February (summer) at 5.76 kWh/m²/day, and the weakest is June (winter) at 3.51 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.
Juiz de Fora'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 Juiz de Fora?
- Juiz de Fora averages 4.68 peak sun hours per day annually, ranging from 3.51 in June to 5.76 in February.
- How many solar panels do I need in Juiz de Fora?
- Panel count depends on your daily load. At Juiz de Fora's annual average of 4.68 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 Juiz de Fora?
- Sizing against Juiz de Fora's worst month (June, 3.51 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 Juiz de Fora's solar resource compare globally?
- Juiz de Fora sits in solar zone 3 out of 5 (where 5 is strongest) at 4.68 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 Juiz de Fora?
- Juiz de Fora's worst month (June) delivers 3.51 kWh/m²/day — about 61% of the summer peak of 5.76. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect Juiz de Fora's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. Juiz de Fora's 4.68 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in Juiz de Fora?
- At Juiz de Fora's latitude (22°), a fixed tilt near 22° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.