"How many units will it give me?" is the first question almost every homeowner asks, and the honest answer is a range rather than a number. Anyone who gives you a single confident figure before seeing your roof is guessing.
Here is how to think about it properly.
In the Jodhpur region, a well-oriented, unshaded and clean 3 kW array would typically be expected to produce somewhere in the range of 330 to 420 units per month, averaged across the year.
That average hides real seasonal swing. Expect the upper end of the range, or above it, through the clear months — roughly October through May. During the monsoon (June to September) output drops noticeably, sometimes by 30–40% compared to a sunny-season month. The shortest winter days also trim generation, though Jodhpur's winters are dry and the sun still appears reliably.
Rajasthan is a genuinely good place to do this. The state receives strong and consistent direct sunlight for most of the year and averages well over 300 clear days annually, which is why it carries India's largest installed solar capacity. The same array produces more here than it would in most of the country. That geography is the core reason rooftop solar makes economic sense in this region in a way it does not everywhere.
Partial shade on a single module can drag down the output of an entire string, so the loss is disproportionate to the area shaded. A neighbouring building that clears your roof in June may clip it badly in December, when the sun sits lower in the sky.
A staircase cabin, overhead tank, or rooftop water heater shadow that seems minor in the morning can park itself on panels for hours at midday. This is exactly why a site survey maps shadows across the day rather than glancing at the roof once.
Jodhpur sits at the edge of the Thar desert. Airborne dust settles on panel glass faster here than in wetter parts of India, and it is the most common reason a system in this region quietly produces less than it should.
The loss is gradual, which is why it goes unnoticed. Nothing breaks, no alarm sounds — the array just produces a little less each week. It is also completely reversible: cleaning restores output. In this climate, regular panel cleaning is not optional maintenance — it is how you recover the performance the system was designed to deliver.
South-facing at a tilt near the local latitude (roughly 26° for Jodhpur) is the reference case. East or west facing loses some yield but is often still worthwhile, particularly if it avoids shading from a nearby wall or cabin. A tilted or elevated mounting structure can recover a surprising amount from an awkward roof.
This one surprises people: panel output falls slightly as cell temperature rises, so the hottest summer afternoons are not the highest-output hours. Elevated structures that allow airflow behind the modules mitigate this. Panels rated to a lower temperature coefficient handle Jodhpur summers better on paper, though the difference at the household scale is modest.
If your household consumes around 250 to 400 units a month, a 3 kW system is usually a sensible match for residential solar use in Jodhpur. Under net metering, units you export on strong days are credited against what you import at night and during weaker months — so the monsoon shortfall is partially offset by the summer surplus.
It will not take your bill to zero. Fixed charges and meter rent continue regardless, and any consumption beyond what your array generates is still billed at your DISCOM slab rate. A correctly sized system reduces the units you buy substantially — that is a different and more honest claim than a zero bill, and it is the one that holds up over time.
If your consumption is consistently above 400 units, it is worth running the numbers on a 5 kW system before committing to a 3 kW, because the incremental cost of the extra capacity is usually lower than it looks.
The PM Surya Ghar scheme pays ₹30,000 per kW for the first 2 kW and ₹18,000 for the third kW, capping at ₹78,000. Details are at pmsuryaghar.gov.in.
A 3 kW system is therefore the smallest array that attracts the full central subsidy. If your consumption genuinely sits in the 250–400 unit band, going to 3 kW rather than 2 kW is usually the right call: you pay more upfront, but you receive ₹18,000 more in subsidy and generate a third more electricity. The PM Surya Ghar subsidy process in Jodhpur has specific steps — the subsidy is not a discount on your invoice but a bank transfer after installation and DISCOM inspection.
Rajasthan has at times offered an additional state-level subsidy on top of the central amount. We are not quoting a figure here, because state schemes change and we would rather you check than trust a number on an installer’s blog — confirm the current amount and eligibility with JdVVNL or the state portal before you count it into your budget.
You do not need instruments:
Inverter apps vary in how clearly they display historical data. If yours does not make monthly comparisons easy, it is worth noting that feature the next time you are evaluating a replacement.
A 3 kW system in Jodhpur is a good fit for a household using roughly 250 to 400 units a month, and the regional conditions genuinely favour it — the irradiance is excellent and the subsidy structure makes 3 kW the most efficient use of the scheme. But the number your roof produces depends on your roof: its shading profile, its orientation, and how often it gets cleaned.
The only accurate figure is the one an engineer gives you after looking at your actual roof. Our site survey is free, and it ends with a written estimate — a range tied to your specific conditions, not a round number from a brochure.