Peak Sun Hours in Jacobabad, Sindh, Pakistan
- Solar zone
- Zone 4 (excellent)
- Best month
- May (7.3)
- Worst month
- December (3.5)
- Climate
- Arid · 29.0°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.73 | 4.00 | 4.19 | 1.51 | 15.9 | 27 |
| Feb | 4.62 | 5.00 | 4.65 | 1.79 | 19.2 | 27 |
| Mar | 5.81 | 6.19 | 5.16 | 2.18 | 25.4 | 25 |
| Apr | 6.76 | 7.07 | 5.20 | 2.62 | 31.7 | 20 |
| May | 7.27 | 7.46 | 4.90 | 3.04 | 36.8 | 18 |
| Jun | 6.99 | 7.18 | 4.01 | 3.32 | 38.7 | 28 |
| Jul | 6.36 | 6.70 | 3.15 | 3.32 | 38.2 | 37 |
| Aug | 6.17 | 6.60 | 3.85 | 2.85 | 36.6 | 39 |
| Sep | 6.00 | 6.15 | 4.94 | 2.28 | 34.2 | 34 |
| Oct | 5.27 | 5.32 | 5.32 | 1.80 | 29.7 | 20 |
| Nov | 4.06 | 4.17 | 4.55 | 1.54 | 23.2 | 22 |
| Dec | 3.52 | 3.71 | 4.27 | 1.38 | 17.8 | 24 |
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 3.52 kWh/m²/day, 0.77 system efficiency.
About solar in Jacobabad
Jacobabad, Pakistan has a dry climate with long hours of direct sunshine and low humidity. Its annual peak sun hours average 5.55 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Jacobabad is May (spring) at 7.27 kWh/m²/day, and the weakest is December (winter) at 3.52 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.
Jacobabad'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 Jacobabad?
- Jacobabad averages 5.55 peak sun hours per day annually, ranging from 3.52 in December to 7.27 in May.
- How many solar panels do I need in Jacobabad?
- Panel count depends on your daily load. At Jacobabad's annual average of 5.55 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 Jacobabad?
- Sizing against Jacobabad's worst month (December, 3.52 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 Jacobabad's solar resource compare globally?
- Jacobabad sits in solar zone 4 out of 5 (where 5 is strongest) at 5.55 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 Jacobabad?
- Arid climates can drop output 10–20% between cleanings. Quarterly cleaning is typical for Jacobabad; monthly during dust-storm seasons. Dew alone isn't enough when rainfall is infrequent.
- Does extreme heat hurt solar output in Jacobabad?
- Yes. Panel efficiency drops ~0.4% per °C above 25 °C cell temperature. In Jacobabad, midday cell temperatures of 55–70 °C can derate output 12–18% below nameplate.
- Is Jacobabad's solar resource as strong as the numbers suggest?
- Jacobabad's 5.55 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.