Peak Sun Hours in Ahmedabad, Gujarat, India
- Solar zone
- Zone 4 (excellent)
- Best month
- May (7.5)
- Worst month
- August (4.3)
- Climate
- Tropical · 27.6°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.60 | 4.76 | 5.57 | 1.52 | 19.9 | 31 |
| Feb | 5.57 | 5.74 | 6.20 | 1.73 | 23.3 | 26 |
| Mar | 6.56 | 6.79 | 6.52 | 1.96 | 28.1 | 24 |
| Apr | 7.29 | 7.46 | 6.74 | 2.12 | 32.6 | 27 |
| May | 7.48 | 7.65 | 6.38 | 2.34 | 35.1 | 36 |
| Jun | 6.29 | 7.23 | 3.92 | 2.84 | 33.6 | 54 |
| Jul | 4.48 | 6.76 | 1.65 | 2.73 | 29.8 | 74 |
| Aug | 4.26 | 6.61 | 1.69 | 2.58 | 28.0 | 83 |
| Sep | 5.22 | 6.31 | 3.67 | 2.34 | 28.0 | 79 |
| Oct | 5.64 | 5.80 | 6.03 | 1.65 | 27.2 | 60 |
| Nov | 4.67 | 4.79 | 5.40 | 1.50 | 24.2 | 46 |
| Dec | 4.30 | 4.41 | 5.57 | 1.33 | 20.9 | 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 4.26 kWh/m²/day, 0.77 system efficiency.
About solar in Ahmedabad
Ahmedabad, India has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.53 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Ahmedabad is May (spring) at 7.48 kWh/m²/day, and the weakest is August (summer) at 4.26 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.
Ahmedabad'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 Ahmedabad?
- Ahmedabad averages 5.53 peak sun hours per day annually, ranging from 4.26 in August to 7.48 in May.
- How many solar panels do I need in Ahmedabad?
- Panel count depends on your daily load. At Ahmedabad's annual average of 5.53 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 Ahmedabad?
- Sizing against Ahmedabad's worst month (August, 4.26 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 Ahmedabad's solar resource compare globally?
- Ahmedabad sits in solar zone 4 out of 5 (where 5 is strongest) at 5.53 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 Ahmedabad?
- Ahmedabad's dry-season output peaks at 7.48 kWh/m²/day in May; the wet season drops it to 4.26 in August. That ~58% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Ahmedabad?
- 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 Ahmedabad?
- Ahmedabad swings from 7.48 kWh/m²/day in May (dry) to 4.26 in August (wet) — roughly 58%. Year-round off-grid systems must size against the wet-season minimum.