Peak Sun Hours in Sialkot, Punjab, Pakistan
- Solar zone
- Zone 4 (excellent)
- Best month
- May (7.2)
- Worst month
- January (3.0)
- Climate
- Tropical · 25.1°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.99 | 3.81 | 4.22 | 1.15 | 12.9 | 45 |
| Feb | 3.92 | 4.79 | 4.80 | 1.40 | 15.8 | 49 |
| Mar | 5.25 | 6.10 | 5.63 | 1.76 | 21.4 | 45 |
| Apr | 6.34 | 7.26 | 5.91 | 2.26 | 27.5 | 37 |
| May | 7.20 | 7.95 | 6.61 | 2.46 | 33.7 | 25 |
| Jun | 7.07 | 7.96 | 6.19 | 2.41 | 35.9 | 32 |
| Jul | 5.99 | 7.39 | 4.28 | 2.60 | 33.5 | 56 |
| Aug | 5.62 | 6.91 | 4.32 | 2.36 | 31.1 | 67 |
| Sep | 5.57 | 6.23 | 5.82 | 1.77 | 29.1 | 60 |
| Oct | 4.99 | 5.21 | 6.72 | 1.27 | 25.3 | 43 |
| Nov | 3.73 | 4.06 | 5.54 | 1.16 | 19.8 | 37 |
| Dec | 3.03 | 3.51 | 4.73 | 1.08 | 15.1 | 38 |
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 2.99 kWh/m²/day, 0.77 system efficiency.
About solar in Sialkot
Sialkot, Pakistan has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.14 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Sialkot is May (spring) at 7.2 kWh/m²/day, and the weakest is January (winter) at 2.99 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the January value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Sialkot'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 Sialkot?
- Sialkot averages 5.14 peak sun hours per day annually, ranging from 2.99 in January to 7.2 in May.
- How many solar panels do I need in Sialkot?
- Panel count depends on your daily load. At Sialkot's annual average of 5.14 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 Sialkot?
- Sizing against Sialkot's worst month (January, 2.99 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 Sialkot's solar resource compare globally?
- Sialkot sits in solar zone 4 out of 5 (where 5 is strongest) at 5.14 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 does the wet season affect solar generation in Sialkot?
- Sialkot's dry-season output peaks at 7.2 kWh/m²/day in May; the wet season drops it to 2.99 in January. That ~82% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Sialkot?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Pakistan, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Sialkot?
- Sialkot swings from 7.2 kWh/m²/day in May (dry) to 2.99 in January (wet) — roughly 82%. Year-round off-grid systems must size against the wet-season minimum.