Savings calculator

What is your roof actually worth?

Move the two numbers you already know — your monthly electricity bill and your tariff — and see the indicative size, saving and payback for your site.

What is your roof actually worth?

Monthly electricity bill₹18.0 L

Our on-site screen starts around ₹5 lakh a month, or 200 kW of load.

Tariff solar can replace₹8.00

Energy charge + electricity duty + surcharge. Exclude fixed and demand charges.

Usable roof area100,000 sq ft

Roughly 100 sq ft per kWp, matching the rule of thumb in our FAQ. Set to zero to size purely on load — we serve any balance from our solar parks via open access.

Grid tariff escalationnone assumed

We default to zero — every figure on the right assumes your grid tariff never rises again. Indian C&I tariffs have historically escalated; set your own assumption and watch the 25-year figure.

Get the engineered version
Indicative payback on plant cost
Indicative system size
Indicative plant cost, excl. GST
Estimated year-one saving
Cumulative net saving over 25 years
CO₂ avoided every year

Cumulative position over 25 years

Still paying back In profit

Prepared on Vibgyor Energy's standard return model with conservative (P90) yield assumptions — 1,350 kWh per kWp per year, 0.7% annual degradation, plant cost indicative and excluding GST, O&M as cleaning plus AMC with escalation, and grid tariff held flat. Savings depend on your tariff category, consumption pattern and site conditions; final numbers follow detailed engineering. This is not an offer or a price quotation. These figures are illustrative. Actual sizing, savings and payback depend on a detailed site and tariff analysis by Vibgyor’s engineering and commercial teams.

Compare the structures

Same site. Three ways to pay for it.

Enter your load once and see what each commercial structure actually does to your cash — who puts up the capital, what you save, and what you own at the end.

Monthly electricity bill₹25.0 L
Your grid tariff₹8.00
Usable roof60,000 sq ft
Tenure at this siteown it / long lease

A 25-year asset on a short tenancy changes which structure fits — see solar on leased premises.

CAPEX

You own the plant

Capital you put up
Saving, year one
Payback
Net over 25 years
You own the asset
Yes, from day one
Who carries O&M risk
You, under our contract

Depreciation benefit sits with you. Financing can cover most of the capital, typically structured 70:30.

OPEX / RESCO

You buy the power

Capital you put up
Zero
Saving, year one
Payback
Not applicable
Net over 25 years
You own the asset
After the minimum term
Who carries O&M risk
We do, entirely

A fixed per-unit rate below your grid tariff, held for 15–25 years. Offered selectively, on credit strength.

OPEN ACCESS

Beyond the roofline

Capital you put up
Saving, year one
Payback
Not applicable
Net over 25 years
You own the asset
26% of the SPV
Who carries O&M risk
We do, at the park

Serves the load your roof cannot. Landed cost is after wheeling, transmission and surcharges — confirmed against your state's order.

Indicative and directional. CAPEX runs the same P90 model as our savings calculator. OPEX assumes a tariff 12.5% below grid, the midpoint of the 10–15% range we typically offer. Open access assumes a landed cost 20% below grid after charges, which varies materially by state and is confirmed against the applicable SERC order before we quote. Grid tariff is held flat throughout, which understates every saving. These figures are illustrative. Actual sizing, savings and payback depend on a detailed site and tariff analysis by Vibgyor’s engineering and commercial teams.

Start the conversation

Send us twelve months of bills.

You have the indicative number — send twelve months of bills and we will replace it with an engineered one. The analysis comes back free, with no commitment.