Peak Sun Hours in New Cairo, Cairo, Egypt
- Solar zone
- Zone 4 (excellent)
- Best month
- June (8.0)
- Worst month
- December (3.2)
- Climate
- Temperate · 21.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.45 | 3.96 | 4.14 | 1.44 | 12.1 | 61 |
| Feb | 4.24 | 4.95 | 4.20 | 1.83 | 13.7 | 56 |
| Mar | 5.56 | 6.22 | 5.03 | 2.20 | 17.1 | 51 |
| Apr | 6.60 | 7.30 | 5.18 | 2.71 | 20.9 | 45 |
| May | 7.44 | 7.91 | 6.19 | 2.64 | 25.3 | 40 |
| Jun | 7.98 | 8.22 | 7.36 | 2.36 | 28.5 | 40 |
| Jul | 7.78 | 8.01 | 7.21 | 2.25 | 29.9 | 42 |
| Aug | 7.15 | 7.43 | 6.40 | 2.37 | 29.9 | 45 |
| Sep | 6.30 | 6.49 | 6.44 | 1.89 | 27.5 | 50 |
| Oct | 4.98 | 5.25 | 5.57 | 1.65 | 23.7 | 56 |
| Nov | 3.78 | 4.15 | 4.69 | 1.43 | 18.7 | 59 |
| Dec | 3.20 | 3.62 | 4.16 | 1.31 | 14.0 | 62 |
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 3.20 kWh/m²/day, 0.77 system efficiency.
About solar in New Cairo
New Cairo, Egypt has a temperate climate with meaningful seasonal variation in solar resource. Its annual peak sun hours average 5.71 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in New Cairo is June (summer) at 7.98 kWh/m²/day, and the weakest is December (winter) at 3.2 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the December value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
New Cairo'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 New Cairo?
- New Cairo averages 5.71 peak sun hours per day annually, ranging from 3.2 in December to 7.98 in June.
- How many solar panels do I need in New Cairo?
- Panel count depends on your daily load. At New Cairo's annual average of 5.71 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 New Cairo?
- Sizing against New Cairo's worst month (December, 3.2 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 New Cairo's solar resource compare globally?
- New Cairo sits in solar zone 4 out of 5 (where 5 is strongest) at 5.71 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 New Cairo?
- New Cairo's worst month (December) delivers 3.2 kWh/m²/day — about 40% of the summer peak of 7.98. Off-grid systems here typically oversize 1.5–2× or pair with a backup source.
- Do cloudy days significantly affect New Cairo's solar?
- Partly. Diffuse light still produces 10–25% of clear-sky output. New Cairo's 5.71 kWh/m²/day already reflects average cloudiness, so no further derating is needed for sizing.
- What panel tilt works best in New Cairo?
- At New Cairo's latitude (30°), a fixed tilt near 30° balances year-round yield. Winter-heavy loads favor latitude + 15°; summer-heavy, latitude − 15°.