Monthly generation per kW in Indore
Modelled AC output for a south-facing array tilted about 20°, after typical system losses (heat, dust, wiring, inverter).
| Month | Units per kW | Units per kW per day | 3 kW system | 5 kW system |
|---|---|---|---|---|
| Jan | 127 | 4.1 | 381 | 635 |
| Feb | 127 | 4.5 | 381 | 635 |
| Mar | 148 | 4.8 | 444 | 740 |
| Apr | 139 | 4.6 | 417 | 695 |
| May | 142 | 4.6 | 426 | 710 |
| Jun | 113 | 3.8 | 339 | 565 |
| Jul | 88 | 2.8 | 264 | 440 |
| Aug | 85 | 2.7 | 255 | 425 |
| Sep | 109 | 3.6 | 327 | 545 |
| Oct | 131 | 4.2 | 393 | 655 |
| Nov | 126 | 4.2 | 378 | 630 |
| Dec | 124 | 4.0 | 372 | 620 |
| Year | 1,459 | 4.0 | 4,377 | 7,295 |
Why March–May is the best season
Clear skies, long days and a high sun give the most energy. Output would be even higher if not for heat: module efficiency drops about 0.3–0.4% for every degree the cells run above 25°C, and cells on an Indore roof can reach 60–65°C in May. Elevated structures help because air flows freely under the modules.
The monsoon dip
From late June to September, cloud cover cuts output to roughly 60–70% of the spring peak. Solar still works on cloudy days — diffuse light still reaches the cells — and rain washes off the dust. Under net metering, surplus credit from sunny months offsets the monsoon shortfall.
Winter: good sun, lower angle
October to February brings clear skies but a lower sun. A tilt close to Indore's latitude (about 20–23°) balances summer and winter. Watch for winter shading: a low sun casts much longer shadows from tanks, parapets and neighbouring buildings than it does in May.
What reduces real-world generation
| Factor | Typical impact |
|---|---|
| Dust between cleanings | 3–15% |
| Partial shading | 5–30%+ depending on layout |
| High cell temperature (summer) | 8–15% |
| Poor tilt or east/west orientation | 5–12% |
| Inverter and cable losses | 3–5% |
See solar panel cleaning in Indore and roof orientation and shading for how to minimise these.
Methodology
Figures are modelled from typical plane-of-array irradiance for Indore (22.7° N, 75.9° E) with a performance ratio of about 0.74–0.79 depending on season, then rounded. They are planning estimates, not a guarantee; your quote includes a site-specific estimate.