Group housing is the best-matched load profile in residential solar and the slowest to close. The engineering is straightforward; the general body meeting is not.
Common-area consumption — lifts, water pumps, corridor and basement lighting, STP — runs through the day and is billed on a single commercial or bulk connection. That profile overlaps almost perfectly with generation, so nearly every unit is self-consumed at the highest avoided tariff available.
1
Connection, bill and approval to manage
70–90%
Of common-area consumption typically offset
Day
When the load and the generation both occur
What slows it down
Approval usually requires a resolution, sometimes a vote, and always a treasurer who wants the numbers checked twice. We now bring metered data from comparable societies to the first meeting rather than a projection, because a real bill from a real complex settles the room faster than any model.
Start with common area, extend later
Committing the whole roof on day one is rarely necessary. Sizing to common-area load first proves the case on the society's own bill, and the structure can be extended once it does.
What to take away
Sandeep Kaul
Field operations
Runs survey and installation crews. Fifteen years on North Indian roofs, most of them in the two weeks before monsoon.
Run these numbers against your own bill
The calculator uses state-wise generation data and the current subsidy slabs. Two inputs, one estimate, no call required.
