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.

Savings calculatorSunlight · NASA POWER climatology, 20+ yearsSubsidy · PM Surya Ghar

How much can solar save you?

Write your monthly bill on the form — or a system size, if you already know it — pick the provider that issues the bill, and share your location if you want the tight figure. Generation is read from satellite sunlight over your own rooftop, not a national average, and every line of the estimate shows the rate it was computed at.

Your estimateBasis · NASA POWER climatology · PR 0.78Residential · Rev A

Plate · the estimateRegional average

Gujarat · state centroid

₹1,20,154saved per year

≈ ₹10,013 per month · 8,640 units generated per year

Monthly generationkWh · regional average · peak Jan 720

02505007501,000

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Indicative only — a free site survey produces the actual quotation.

Get my proposalA site survey costs nothing and commits you to nothing.

SILINFRA LLP — Solar Savings Estimate

silinfra.co · info@silinfra.co · +91 6355-149157 · Surat, Gujarat · 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 the roof

Find the building on the satellite plate and mark each corner of the roof. We measure the polygon on the ellipsoid, take off the walkways and shading, and size the array from what is left.

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What the figures rest on

Four questions the estimate answers before anyone asks them. If a fifth matters to you, ask us.

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.