Peak Sun Hours in Rājkot, Gujarat, India
- Solar zone
- Zone 4 (excellent)
- Best month
- May (7.4)
- Worst month
- August (4.3)
- Climate
- Tropical · 26.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.66 | 4.78 | 5.72 | 1.40 | 19.6 | 37 |
| Feb | 5.55 | 5.67 | 6.22 | 1.60 | 22.6 | 38 |
| Mar | 6.51 | 6.65 | 6.57 | 1.84 | 26.9 | 42 |
| Apr | 7.19 | 7.32 | 6.65 | 2.08 | 30.6 | 47 |
| May | 7.39 | 7.54 | 6.46 | 2.24 | 32.3 | 54 |
| Jun | 6.00 | 7.06 | 3.65 | 2.80 | 31.6 | 64 |
| Jul | 4.34 | 6.66 | 1.51 | 2.70 | 29.0 | 77 |
| Aug | 4.25 | 6.51 | 1.64 | 2.59 | 27.7 | 82 |
| Sep | 5.18 | 6.21 | 3.47 | 2.40 | 27.7 | 79 |
| Oct | 5.47 | 5.65 | 5.41 | 1.77 | 27.6 | 62 |
| Nov | 4.64 | 4.79 | 5.17 | 1.53 | 24.6 | 47 |
| Dec | 4.31 | 4.44 | 5.41 | 1.33 | 20.8 | 41 |
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 4.25 kWh/m²/day, 0.77 system efficiency.
About solar in Rājkot
Rājkot, India has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.46 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Rājkot is May (spring) at 7.39 kWh/m²/day, and the weakest is August (summer) at 4.25 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the August value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Rājkot'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 Rājkot?
- Rājkot averages 5.46 peak sun hours per day annually, ranging from 4.25 in August to 7.39 in May.
- How many solar panels do I need in Rājkot?
- Panel count depends on your daily load. At Rājkot's annual average of 5.46 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 Rājkot?
- Sizing against Rājkot's worst month (August, 4.25 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 Rājkot's solar resource compare globally?
- Rājkot sits in solar zone 4 out of 5 (where 5 is strongest) at 5.46 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 Rājkot?
- Rājkot's dry-season output peaks at 7.39 kWh/m²/day in May; the wet season drops it to 4.25 in August. That ~58% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Rājkot?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like India, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Rājkot?
- Rājkot swings from 7.39 kWh/m²/day in May (dry) to 4.25 in August (wet) — roughly 58%. Year-round off-grid systems must size against the wet-season minimum.