Solar, storage and hybrid plants for industry, with the switchboards built in our own works.
Free tool for industrial plants in Gujarat
Solar and storage payback estimator
Enter your monthly units, your landed tariff and, if you have it, your roof area. See the solar size that fits your daytime load, whether storage makes sense for your plant, the indicative capex of each, and the payback of solar alone against solar with storage. Runs in your browser; nothing is uploaded.
This calculator needs JavaScript. If nothing appears below, enable JavaScript or send us your bills and we will run the numbers for you.
Your numbers
Enter monthly units and your landed tariff to begin.
—solar that fits your daytime load
—payback, solar alone
Unlock the detailed report
The headline numbers are free. The full breakdown, sizing and payback are emailed to you and unlocked here once you verify your work email.
- Full breakdown of every figure
- System size, capex and payback
- What to do next, flagged by our engineers
- A copy emailed to you, plus one-click request for the free feasibility study
One-time code to your email, nothing else. We do not share your details.
Verified as . The detailed report is below and in your inbox.
How the estimator sizes the system
Solar is sized to your daytime load, not your roof
A plant running two shifts uses roughly 60 per cent of its power in daylight. Solar is sized to cover that share and no more, because every unit generated beyond what you can use on site is either exported at a poor rate or lost. If your roof cannot fit that size, the roof sets the limit and the estimator says so.
When storage is recommended
Storage earns its place when one of three things is true: a meaningful midday surplus that could be shifted to the evening, DG running of about twenty hours a month or more, or demand charges large enough that a twenty per cent cut pays. The estimator checks all three and sizes the battery to the largest need, rounded to standard sizes.
What is in the payback
- Solar: units used on site valued at your landed tariff, against the installed cost per kWp.
- Storage: surplus shifted to the evening, DG units replaced, and the demand-charge cut, against the installed cost per kWh.
- Not counted: accelerated depreciation, avoided production loss from trips, and tariff escalation. All three shorten the real payback.
How much roof do I need per kWp?
About 100 square feet per kWp on a flat or lightly pitched industrial shed, allowing for walkways and shading. An acre of roof is roughly 400 kWp; a 1 MWp plant needs about 2.5 acres of clear roof, or 4 acres of land for ground-mount.
Why does the estimator sometimes say storage is not yet worth it?
Single-shift plants with little DG running and modest demand charges get most of their saving from solar alone. We still build the switchboard with a spare feeder and EMS interface so storage can be added later without rebuilding.
Is the solar yield figure right for my site?
1,450 kWh per kWp per year is a conservative P50 for a well-oriented rooftop in Gujarat. Shading, tilt and soiling move it either way, which is why the feasibility study runs a proper yield study for your roof before we quote.
