Peak Sun Hours in Dadu, Sindh, Pakistan
- Solar zone
- Zone 4 (excellent)
- Best month
- May (7.2)
- Worst month
- December (3.8)
- Climate
- Arid · 27.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.99 | 4.25 | 4.38 | 1.58 | 16.2 | 32 |
| Feb | 4.97 | 5.25 | 4.97 | 1.87 | 19.6 | 30 |
| Mar | 6.05 | 6.37 | 5.25 | 2.28 | 25.5 | 28 |
| Apr | 6.77 | 7.10 | 4.91 | 2.77 | 31.3 | 27 |
| May | 7.16 | 7.44 | 4.75 | 3.04 | 35.2 | 31 |
| Jun | 6.89 | 7.19 | 4.06 | 3.22 | 36.0 | 41 |
| Jul | 6.20 | 6.67 | 2.91 | 3.33 | 34.8 | 49 |
| Aug | 6.03 | 6.57 | 3.37 | 3.00 | 33.5 | 51 |
| Sep | 5.96 | 6.23 | 4.49 | 2.47 | 32.1 | 46 |
| Oct | 5.39 | 5.50 | 5.24 | 1.90 | 29.1 | 29 |
| Nov | 4.28 | 4.41 | 4.63 | 1.62 | 23.3 | 27 |
| Dec | 3.76 | 3.94 | 4.40 | 1.47 | 17.9 | 28 |
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 3.76 kWh/m²/day, 0.77 system efficiency.
About solar in Dadu
Dadu, Pakistan has a dry climate with long hours of direct sunshine and low humidity. Its annual peak sun hours average 5.62 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Dadu is May (spring) at 7.16 kWh/m²/day, and the weakest is December (winter) at 3.76 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.
Dadu'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 Dadu?
- Dadu averages 5.62 peak sun hours per day annually, ranging from 3.76 in December to 7.16 in May.
- How many solar panels do I need in Dadu?
- Panel count depends on your daily load. At Dadu's annual average of 5.62 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 Dadu?
- Sizing against Dadu's worst month (December, 3.76 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 Dadu's solar resource compare globally?
- Dadu sits in solar zone 4 out of 5 (where 5 is strongest) at 5.62 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 often should I clean solar panels in Dadu?
- Arid climates can drop output 10–20% between cleanings. Quarterly cleaning is typical for Dadu; monthly during dust-storm seasons. Dew alone isn't enough when rainfall is infrequent.
- Does extreme heat hurt solar output in Dadu?
- Yes. Panel efficiency drops ~0.4% per °C above 25 °C cell temperature. In Dadu, midday cell temperatures of 55–70 °C can derate output 12–18% below nameplate.
- Is Dadu's solar resource as strong as the numbers suggest?
- Dadu's 5.62 kWh/m²/day is excellent globally. But heat derating and dust accumulation mean real-world yields typically land 10–15% below this headline figure — factor that into sizing.