Peak Sun Hours in Kallakurichi, Tamil Nadu, India
- Solar zone
- Zone 4 (excellent)
- Best month
- April (6.5)
- Worst month
- November (4.3)
- Climate
- Tropical · 26.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.16 | 5.85 | 4.33 | 2.13 | 23.0 | 75 |
| Feb | 6.06 | 6.54 | 5.25 | 2.14 | 25.2 | 66 |
| Mar | 6.42 | 6.96 | 5.01 | 2.36 | 28.5 | 58 |
| Apr | 6.48 | 7.13 | 4.73 | 2.49 | 30.6 | 57 |
| May | 6.05 | 6.91 | 3.98 | 2.58 | 30.1 | 62 |
| Jun | 5.60 | 6.85 | 3.14 | 2.73 | 28.7 | 64 |
| Jul | 5.30 | 6.83 | 2.48 | 2.78 | 28.3 | 64 |
| Aug | 5.42 | 6.90 | 2.70 | 2.73 | 27.9 | 67 |
| Sep | 5.48 | 6.80 | 3.01 | 2.67 | 27.2 | 73 |
| Oct | 4.84 | 6.31 | 2.64 | 2.44 | 25.9 | 80 |
| Nov | 4.26 | 5.83 | 2.69 | 2.11 | 23.9 | 85 |
| Dec | 4.29 | 5.54 | 3.17 | 2.01 | 22.8 | 82 |
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 Kallakurichi
Kallakurichi, India has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.45 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Kallakurichi is April (spring) at 6.48 kWh/m²/day, and the weakest is November (autumn) at 4.26 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the November value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Kallakurichi'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 Kallakurichi?
- Kallakurichi averages 5.45 peak sun hours per day annually, ranging from 4.26 in November to 6.48 in April.
- How many solar panels do I need in Kallakurichi?
- Panel count depends on your daily load. At Kallakurichi's annual average of 5.45 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 Kallakurichi?
- Sizing against Kallakurichi's worst month (November, 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 Kallakurichi's solar resource compare globally?
- Kallakurichi sits in solar zone 4 out of 5 (where 5 is strongest) at 5.45 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 Kallakurichi?
- Kallakurichi's dry-season output peaks at 6.48 kWh/m²/day in April; the wet season drops it to 4.26 in November. That ~41% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Kallakurichi?
- 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 Kallakurichi?
- Kallakurichi swings from 6.48 kWh/m²/day in April (dry) to 4.26 in November (wet) — roughly 41%. Year-round off-grid systems must size against the wet-season minimum.