Most households track the headline tariff and are surprised by the bill anyway. The reason is that three separate mechanisms push the amount payable upward, and only one of them makes the news.
The first is slab creep. Residential tariffs are tiered, so as annual consumption rises — one more air conditioner, one more appliance — a growing share of units is billed at the higher slabs. Your average rate per unit rises even when the published tariff has not moved.
The second is the fuel and power purchase adjustment surcharge, revised on a much shorter cycle than tariffs and passed through directly. The third is fixed charges, levied on sanctioned load rather than consumption, which have risen steadily across North Indian discoms.
3
Separate mechanisms raising the amount payable
Monthly
Frequency at which surcharges can be re-set
0
Of the three that apply to a self-consumed solar unit
What stepping off looks like
A self-consumed solar unit is not billed under any slab, carries no surcharge, and does not touch your sanctioned load. It is the one part of household energy that is insulated from all three mechanisms for the life of the system. That is the structural argument for solar, and it holds regardless of what any single year's tariff order says.
Model escalation, not a flat rate
Any payback estimate built on today's tariff staying flat for twenty-five years is understating the case. We escalate the avoided rate in every model we publish, and state the assumption on the estimate.
What to take away
Neha Rastogi
Energy analyst
Builds the savings models behind every RePrime quote, using meter data from commissioned systems rather than brochure yields.
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.
