The left column is how this industry quotes. The right is what we think your roof will actually do. Same system, same subsidy, same bill — the difference is entirely in the assumptions, and we have written every one of ours down.
Off your last bill. Use an average of six months, not the January one.
This is the size we would recommend for 350 units.
Printed on your bill. The DISCOM approves capacity against this, not against your roof.
The single most common shading object on an Indian roof, and it sits in the worst possible place.
Ideal yield, no dust, no ageing, and every generated unit assumed to replace one at your top slab.
Our measured median yield, this roof's shading, a fortnightly wash, and the way net metering actually settles.
That is the entire difference between the two columns, and none of it is a matter of opinion — it is dust, heat, ageing, and the settlement rate for units you export and do not use. Every one of those is measurable and every one of them is left out of a standard quote.
Honest payback
Fixed charges and electricity duty do not go away. Solar removes energy charges, not your connection.
Of which about 2,504 kWh is used in the house as it is made and 1,535 kWh is exported.
300 sq ft of clear roof at 100 sq ft per kW.
₹30,000 per kW for the first 2 kW, ₹18,000 for the third, capped at ₹78,000. Paid to your bank account, never to ours.
In the twenty-five year figure on the right. It is not in anybody else's.
Generation
Off your bill