Peak Sun Hours in Faisalabad, Punjab, Pakistan
- Solar zone
- Zone 3 (good)
- Best month
- May (6.8)
- Worst month
- December (2.8)
- Climate
- Arid · 26.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.78 | 3.37 | 2.70 | 1.39 | 12.6 | 42 |
| Feb | 3.89 | 4.48 | 3.65 | 1.73 | 15.9 | 43 |
| Mar | 5.14 | 5.73 | 4.32 | 2.14 | 22.2 | 39 |
| Apr | 6.22 | 6.84 | 4.89 | 2.63 | 28.6 | 32 |
| May | 6.75 | 7.23 | 4.87 | 2.98 | 34.8 | 23 |
| Jun | 6.37 | 6.95 | 3.68 | 3.13 | 37.4 | 28 |
| Jul | 5.52 | 6.35 | 2.48 | 3.09 | 35.9 | 45 |
| Aug | 5.40 | 6.20 | 2.91 | 2.82 | 34.3 | 49 |
| Sep | 5.22 | 5.66 | 3.90 | 2.30 | 31.7 | 45 |
| Oct | 4.37 | 4.53 | 3.72 | 1.96 | 26.9 | 33 |
| Nov | 3.27 | 3.47 | 3.08 | 1.57 | 20.1 | 33 |
| Dec | 2.77 | 3.07 | 2.96 | 1.33 | 14.7 | 36 |
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 2.77 kWh/m²/day, 0.77 system efficiency.
About solar in Faisalabad
Faisalabad, Pakistan has a dry climate with long hours of direct sunshine and low humidity. Its annual peak sun hours average 4.81 kWh/m²/day, a good solar resource by global standards.
The strongest month in Faisalabad is May (spring) at 6.75 kWh/m²/day, and the weakest is December (winter) at 2.77 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.
Faisalabad'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 Faisalabad?
- Faisalabad averages 4.81 peak sun hours per day annually, ranging from 2.77 in December to 6.75 in May.
- How many solar panels do I need in Faisalabad?
- Panel count depends on your daily load. At Faisalabad's annual average of 4.81 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 Faisalabad?
- Sizing against Faisalabad's worst month (December, 2.77 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 Faisalabad's solar resource compare globally?
- Faisalabad sits in solar zone 3 out of 5 (where 5 is strongest) at 4.81 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 often should I clean solar panels in Faisalabad?
- Arid climates can drop output 10–20% between cleanings. Quarterly cleaning is typical for Faisalabad; monthly during dust-storm seasons. Dew alone isn't enough when rainfall is infrequent.
- Does extreme heat hurt solar output in Faisalabad?
- Yes. Panel efficiency drops ~0.4% per °C above 25 °C cell temperature. In Faisalabad, midday cell temperatures of 55–70 °C can derate output 12–18% below nameplate.
- Is Faisalabad's solar resource as strong as the numbers suggest?
- Faisalabad's 4.81 kWh/m²/day is good globally. But heat derating and dust accumulation mean real-world yields typically land 10–15% below this headline figure — factor that into sizing.