Why solar
Grid electricity → rising bills. Solar → your own power.
The comparison below is the whole argument. Everything else is engineering detail.
You rent power, forever
- The tariff is revised upward almost every year
- You pay for every unit, and you own nothing at the end
- A cost you can neither cap nor predict
- Your roof stays empty while the meter keeps running
You buy the asset once
- One investment, then the cost per unit stops rising
- The system keeps producing long after it has paid for itself
- Surplus units are credited back through net metering
- A 25-year asset sitting on space you already own
Both charts above are illustrative shapes, not your numbers. To see figures based on your own bill, use the savings calculator.
Six reasons this decision is easier than it looks
~4%
average annual tariff rise
Grid tariffs only move one way
Commercial and industrial tariffs in Maharashtra have risen steadily year after year. Every rise increases the value of power you generate yourself.
Your roof is already paid for
The most expensive part of any power plant is the land. On a rooftop system, you already own it and it is currently doing nothing.
9AM-6PM
peak generation window
Generation matches business hours
A commercial or industrial load runs through the day - which is exactly when a solar array is producing at its peak.
40%
accelerated depreciation
40% depreciation in year one
Commercial and industrial buyers can claim accelerated depreciation, which pulls a large part of the cost into the first year's books.
25 yrs
performance warranty
25-year asset, 3-6 year payback
Panels carry a 25-year performance warranty. Everything generated after payback is effectively free power.
~120 t
CO2 offset per 100 kW/year
Measurable carbon reduction
Every 100 kW offsets roughly 120 tonnes of CO2 a year - increasingly something export clients ask to see documented.
The same money, spent two different ways
Over twenty-five years, the electricity you are going to buy anyway costs far more than the system that would have generated it. The only real question is whether that money leaves as a monthly bill or as a one-time asset on your own roof.
Work it out for my billProportions shown are illustrative. The actual ratio depends on your tariff, consumption and system size.
Questions clients actually ask
Roughly 80 to 100 sq ft of shadow-free area per kW. A 10 kW system needs about 800 to 1,000 sq ft. Elevated structures can reclaim area that is currently used for other equipment.
A standard on-grid system will not - it shuts down for the safety of line workers. If you need power during outages, you need a hybrid system with a battery bank.
A residential system is typically 5 to 10 days on site. Commercial and industrial systems take 3 to 6 weeks depending on capacity. Net-metering approval from the DISCOM usually adds another 2 to 4 weeks after that.
Panel cleaning every 15 to 30 days depending on dust, and an electrical inspection twice a year. There are no moving parts in an on-grid system.
Central subsidy under PM Surya Ghar applies to residential rooftop systems, subject to prevailing MNRE rates and caps. Commercial and industrial systems are not eligible for subsidy but can claim accelerated depreciation instead.
With net metering, surplus units are exported to the grid and credited against what you import. Settlement follows your DISCOM's billing cycle and prevailing net-metering policy.
Modules carry a 25-year performance warranty, typically guaranteeing around 80% of rated output at year 25. Inverters usually need replacement once in that period.
Yes - application, feasibility, net-meter sanction, inspection and subsidy filing are all handled by our liaison team as part of the project.