Direct answer: Rooftop solar is mainly worth calculating after Gruha Jyothi if your household regularly pays for electricity above the free entitlement, has high daytime use, or expects usage to grow. If most months stay within the free units and you pay little or nothing, a large system is unlikely to be the first conversation. Share your BESCOM bill in units on Call / WhatsApp +91 7975009078 and Eltron will tell you honestly whether solar, a smaller size, or no system yet makes sense.
Why the rupee bill alone can mislead you
Gruha Jyothi changes what you pay, but your meter still records how many units your home uses. Two homes with a similar rupee bill can have very different unit patterns across summer, monsoon and winter. Solar sizing starts with units: how much you use, when you use it, and how much of it can be met while the sun is generating. That is why Eltron asks for BESCOM bills across the year rather than sizing from one month’s amount.
The 350+ units check
As a first filter, households regularly using around 350 units or more a month are in the range where a 3 kW conversation is worth calculating carefully. Below that, the answer depends on how much you pay above the free entitlement, your daytime load and whether usage will rise with AC, a water heater, a home office or an EV. Above that range, compare 3 kW and 5 kW from the same bills so the size matches your actual pattern rather than a headline offer.
| Your BESCOM pattern | First conversation |
|---|---|
| Mostly within free units, little or no payment in most months | Check units first; solar may not be urgent unless usage is rising |
| Regular payment above the free entitlement | Calculate solar from 12 months of units and daytime use |
| Around 350+ units a month on a regular pattern | Compare 3 kW carefully, and check whether 5 kW fits daytime load |
| High bills with AC, EV, pump or home-office load | Compare 3 kW, 5 kW and larger sizes on the cost hub |
How Eltron checks whether solar is worth it for you
- Read your BESCOM bills in units across the year, not only the amount payable.
- Separate regular use from one-off high months and note seasonal AC or heater use.
- Check daytime consumption, because power you use as it is generated is central to the calculation.
- Survey the roof and complete 3D shadow analysis before final sizing.
- Present the size, indicative cost, subsidy and payback calculation from your own bill, including the option that a smaller system is the better fit.
Cost and subsidy links for the calculation
Eltron published guides list 3 kW at ₹1.8–2.4 lakh before subsidy, with a ₹78,000 PM Surya Ghar subsidy for an eligible 3 kW home, and 5 kW at ₹2.1–2.7 lakh net after subsidy. Use the rooftop solar cost in Bangalore hub for the 1–10 kW summary, then read the 3 kW solar cost guide or 5 kW solar cost guide for the size closest to your usage.
When to wait or choose smaller
Wait or choose smaller if your paid consumption is low in most months, your roof has heavy shadow that cannot be designed around, or you plan to move or rebuild the roof soon. Say that at the first call. A good installer should be willing to recommend a smaller system or no system yet when the bill does not support a larger one.
Get an honest bill check after Gruha Jyothi
Tell us your monthly bill in units, your roof type and your location. We will check shadow, roof readiness and the right system size before quoting.
Call / WhatsApp +91 7975009078 | Contact Eltron Energy
FAQ: Solar after Gruha Jyothi
Is rooftop solar worth it if I get Gruha Jyothi free units?
It is mainly worth calculating if you regularly pay above the free entitlement or have high and growing daytime use. Share your BESCOM bill in units so Eltron can check the pattern across the year.
How many units make solar worth checking?
Around 350 units or more a month on a regular pattern is a useful first filter for a careful 3 kW calculation. Lower usage can still be worth checking if you pay above the entitlement or expect usage to rise.
Will solar reduce my bill to zero?
No responsible quote should promise that for every home. Your outcome depends on size, generation at your roof, daytime use, DISCOM accounting and how much you draw from the grid.
Prices and scheme figures on this page are indicative only, based on Eltron Energy published guides as noted in the page notes, and your final quote, subsidy eligibility and DISCOM process are confirmed after a free site survey and at application.