Peak Sun Hours in Navi Mumbai, Maharashtra, India
- Solar zone
- Zone 4 (excellent)
- Best month
- April (7.2)
- Worst month
- July (3.3)
- Climate
- Tropical · 26.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.92 | 5.12 | 5.20 | 1.73 | 23.2 | 51 |
| Feb | 5.77 | 5.96 | 5.68 | 1.91 | 25.7 | 44 |
| Mar | 6.61 | 6.84 | 5.90 | 2.14 | 28.7 | 45 |
| Apr | 7.19 | 7.39 | 6.13 | 2.29 | 30.7 | 53 |
| May | 7.19 | 7.56 | 5.74 | 2.47 | 31.2 | 60 |
| Jun | 4.78 | 7.10 | 2.14 | 2.51 | 28.7 | 80 |
| Jul | 3.26 | 6.76 | 0.57 | 2.14 | 26.6 | 90 |
| Aug | 3.29 | 6.65 | 0.68 | 2.11 | 26.1 | 90 |
| Sep | 4.30 | 6.36 | 2.01 | 2.26 | 26.2 | 89 |
| Oct | 5.17 | 5.80 | 4.13 | 2.08 | 26.2 | 78 |
| Nov | 4.90 | 5.14 | 4.96 | 1.72 | 24.6 | 69 |
| Dec | 4.60 | 4.81 | 5.10 | 1.59 | 23.3 | 60 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
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- 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 3.26 kWh/m²/day, 0.77 system efficiency.
About solar in Navi Mumbai
Navi Mumbai, India has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.17 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Navi Mumbai is April (spring) at 7.19 kWh/m²/day, and the weakest is July (summer) at 3.26 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the July value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Navi Mumbai'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 Navi Mumbai?
- Navi Mumbai averages 5.17 peak sun hours per day annually, ranging from 3.26 in July to 7.19 in April.
- How many solar panels do I need in Navi Mumbai?
- Panel count depends on your daily load. At Navi Mumbai's annual average of 5.17 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 Navi Mumbai?
- Sizing against Navi Mumbai's worst month (July, 3.26 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 Navi Mumbai's solar resource compare globally?
- Navi Mumbai sits in solar zone 4 out of 5 (where 5 is strongest) at 5.17 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 Navi Mumbai?
- Navi Mumbai's dry-season output peaks at 7.19 kWh/m²/day in April; the wet season drops it to 3.26 in July. That ~76% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Navi Mumbai?
- 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 Navi Mumbai?
- Navi Mumbai swings from 7.19 kWh/m²/day in April (dry) to 3.26 in July (wet) — roughly 76%. Year-round off-grid systems must size against the wet-season minimum.