Peak Sun Hours in Dera Ghazi Khan, Punjab, Pakistan
- Solar zone
- Zone 4 (excellent)
- Best month
- May (6.8)
- Worst month
- December (3.1)
- Climate
- Arid · 27.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.29 | 3.68 | 3.65 | 1.44 | 13.8 | 33 |
| Feb | 4.16 | 4.69 | 4.09 | 1.72 | 17.0 | 34 |
| Mar | 5.30 | 5.92 | 4.46 | 2.19 | 23.1 | 32 |
| Apr | 6.36 | 6.98 | 4.93 | 2.52 | 29.7 | 26 |
| May | 6.85 | 7.38 | 4.73 | 2.87 | 35.4 | 19 |
| Jun | 6.57 | 7.12 | 3.78 | 3.11 | 37.9 | 27 |
| Jul | 5.93 | 6.54 | 2.79 | 3.18 | 37.5 | 36 |
| Aug | 5.70 | 6.32 | 3.11 | 2.91 | 36.0 | 39 |
| Sep | 5.46 | 5.81 | 4.02 | 2.38 | 33.2 | 33 |
| Oct | 4.66 | 4.78 | 4.06 | 1.96 | 27.8 | 23 |
| Nov | 3.56 | 3.73 | 3.64 | 1.56 | 21.1 | 26 |
| Dec | 3.15 | 3.37 | 3.78 | 1.32 | 15.9 | 29 |
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 3.15 kWh/m²/day, 0.77 system efficiency.
About solar in Dera Ghazi Khan
Dera Ghazi Khan, Pakistan has a dry climate with long hours of direct sunshine and low humidity. Its annual peak sun hours average 5.08 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Dera Ghazi Khan is May (spring) at 6.85 kWh/m²/day, and the weakest is December (winter) at 3.15 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.
Dera Ghazi Khan'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 Dera Ghazi Khan?
- Dera Ghazi Khan averages 5.08 peak sun hours per day annually, ranging from 3.15 in December to 6.85 in May.
- How many solar panels do I need in Dera Ghazi Khan?
- Panel count depends on your daily load. At Dera Ghazi Khan's annual average of 5.08 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 Dera Ghazi Khan?
- Sizing against Dera Ghazi Khan's worst month (December, 3.15 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 Dera Ghazi Khan's solar resource compare globally?
- Dera Ghazi Khan sits in solar zone 4 out of 5 (where 5 is strongest) at 5.08 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 Dera Ghazi Khan?
- Arid climates can drop output 10–20% between cleanings. Quarterly cleaning is typical for Dera Ghazi Khan; monthly during dust-storm seasons. Dew alone isn't enough when rainfall is infrequent.
- Does extreme heat hurt solar output in Dera Ghazi Khan?
- Yes. Panel efficiency drops ~0.4% per °C above 25 °C cell temperature. In Dera Ghazi Khan, midday cell temperatures of 55–70 °C can derate output 12–18% below nameplate.
- Is Dera Ghazi Khan's solar resource as strong as the numbers suggest?
- Dera Ghazi Khan's 5.08 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.