Savings calculator

How much can solar save you?

Enter your monthly bill (or a system size), pick your DISCOM, and optionally share your location — we'll estimate generation from NASA satellite sunlight data at your rooftop, plus cost, subsidy, savings and payback.

Your monthly bill

₹

StateCity (optional)

Roof type

RCC needs an elevated structure (₹60k/kW); sheet mounts directly (₹48k/kW).

Electricity provider

Sunlight data: NASA satellite irradiance at Gujarat (state average).

Estimates only — final system size and cost depend on your roof, load and a site survey. Install cost per roof type (₹60,000/kW selected); subsidy per PM Surya Ghar residential slabs. Savings use your provider's effective rate (incl. fuel surcharge & duty); surplus exports credited at ~₹2.25/unit. Commercial & industrial systems are quoted separately.

System size

6 kWp

Roof area

480 sq ft

Annual generation

8,640 kWh

System cost

₹3,60,000

Govt. subsidy

₹78,000

Net payable after subsidy

₹2,82,000

Monthly savings (avg)

₹10,013

Annual savings

₹1,20,154

Payback period

2.3 yrs

25-yr savings

₹30,03,850

💳 Finance it — ₹0 down

EMI ≈ ₹3,274/month · 10 yrs @ 7%

₹6,726/mo less than your current bill — from day one

PM Surya Ghar residential systems qualify for collateral-free bank loans up to ₹2,00,000 at ~7% p.a. (up to 10 years); larger amounts are financed at standard solar-loan rates. We assist with the loan paperwork.

Estimated monthly generationkWh · regional average · ~6.2 t CO₂ avoided/yr

Like these numbers? Get a precise, site-specific proposal.

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SILINFRA LLP — Solar Savings Estimate

silinfra.co · info@silinfra.co · +91 6355-149157 · Surat, Gujarat — 395006 · GSTIN 24AFSFS4304L1ZM

Location	Gujarat — sunlight from NASA satellite irradiance at Gujarat (state average)
Electricity provider	Torrent Power (effective rate ₹14.00/unit)
Monthly bill	₹10,000 (~714 units/month)
Recommended system size	6 kWp (~480 sq ft roof area)
Roof type	RCC / concrete (₹60,000/kW)
Estimated annual generation	8,640 kWh
System cost (indicative)	₹3,60,000
PM Surya Ghar subsidy	₹78,000
Net payable	₹2,82,000
Financing option	EMI ≈ ₹3,274/month (10 yrs @ 7% p.a., PM Surya Ghar collateral-free loan)
Savings	₹10,013/month · ₹1,20,154/year
Payback period	2.3 years
25-year savings	₹30,03,850
CO₂ avoided	~6.2 tonnes/year

Indicative estimate generated at silinfra.co/calculator — not a quotation. Final system size, cost and savings depend on roof survey, structural design, shading analysis and DISCOM approvals. Savings modelled on the provider's effective per-unit rate (energy charge + fuel surcharge + electricity duty); fixed charges excluded; surplus exports at ~₹2.25/unit. Book a free site survey for a firm proposal.

Roof sketch

Not sure what fits? Outline your roof

Find your building on the satellite map and tap your roof corners — we'll measure it and size the system.

LOADING SATELLITE MAP…

Calculator FAQ

How accurate is this estimate?

Generation uses NASA satellite irradiance (20+ year climatology) at your location — share your exact location for the tightest numbers, or we use your state’s average. Costs use current residential install rates. A free site survey produces an exact quote.

How are savings calculated?

Every solar unit you self-consume saves your provider’s full effective rate — energy charge plus fuel surcharge (FPPPA) plus electricity duty, since all of these scale with units. Fixed charges are excluded (solar doesn’t remove them), and surplus units exported beyond your consumption are credited at your DISCOM’s settlement rate, not the retail rate.

Does this include the PM Surya Ghar subsidy?

Yes — residential systems show the applicable central subsidy (up to ₹78,000 for 3 kW and above). Commercial and utility systems are quoted separately without residential subsidy.

What is the payback period?

For most residential rooftops, payback is 3–4 years, after which generation is effectively free for 20+ years.