Peak Sun Hours in Recife, Pernambuco, Brazil
- Solar zone
- Zone 5 (exceptional)
- Best month
- November (7.0)
- Worst month
- June (4.7)
- Climate
- Equatorial · 26.1°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 6.64 | 7.72 | 5.32 | 2.46 | 27.1 | 72 |
| Feb | 6.58 | 7.68 | 5.06 | 2.46 | 27.3 | 74 |
| Mar | 6.42 | 7.43 | 5.31 | 2.25 | 27.4 | 75 |
| Apr | 5.83 | 6.81 | 5.27 | 1.95 | 27.0 | 79 |
| May | 5.06 | 6.12 | 4.76 | 1.79 | 26.2 | 82 |
| Jun | 4.66 | 5.82 | 4.44 | 1.69 | 25.1 | 83 |
| Jul | 4.92 | 5.99 | 4.78 | 1.70 | 24.3 | 84 |
| Aug | 5.66 | 6.54 | 5.39 | 1.83 | 24.1 | 81 |
| Sep | 6.32 | 7.11 | 5.42 | 2.11 | 24.7 | 78 |
| Oct | 6.73 | 7.56 | 5.59 | 2.28 | 25.8 | 74 |
| Nov | 6.99 | 7.74 | 6.20 | 2.27 | 26.6 | 71 |
| Dec | 6.83 | 7.67 | 5.87 | 2.38 | 27.1 | 70 |
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 4.66 kWh/m²/day, 0.77 system efficiency.
About solar in Recife
Recife, 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 6.05 kWh/m²/day, a exceptional solar resource by global standards.
The strongest month in Recife is November (spring) at 6.99 kWh/m²/day, and the weakest is June (winter) at 4.66 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.
Recife's exceptional solar resource means panels can be sized close to demand rather than heavily oversized, which keeps installation costs down.
FAQ
- What are the peak sun hours in Recife?
- Recife averages 6.05 peak sun hours per day annually, ranging from 4.66 in June to 6.99 in November.
- How many solar panels do I need in Recife?
- Panel count depends on your daily load. At Recife's annual average of 6.05 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 Recife?
- Sizing against Recife's worst month (June, 4.66 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 Recife's solar resource compare globally?
- Recife sits in solar zone 5 out of 5 (where 5 is strongest) at 6.05 kWh/m²/day — exceptional 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 Recife?
- Near the equator, day length is nearly constant year-round and the sun stays close to overhead. In Recife, monthly PSH ranges just from 4.66 to 6.99 kWh/m²/day — variance is driven by wet-season cloud cover, not day length.
- What tilt angle works best for panels in Recife?
- At latitude 8°, panels in Recife work best at a low tilt (roughly 8°) or horizontal. Tracking mounts add little benefit this close to the equator.
- How does the wet season affect solar output in Recife?
- Equatorial wet seasons reduce output through cloud cover, not day length. Recife's worst month (June) still delivers 4.66 kWh/m²/day — design against this value for reliable year-round off-grid use.