Chhote power cuts battery lega. Lambe cut genset, jaise aaj. Six sawaal, poora hisaab, aur agar yeh aapki site ke liye sahi nahi hai, woh bhi saaf saaf.
Name the site and we identify your distribution licensee, what power cut history they publish, and the diesel price and grid tariff for that belt, then load a working model you can adjust.
| Loaded for this belt | Value | Where it came from |
|---|---|---|
| Diesel pump price | - | Verified 3 Oct 26 |
| Landed C&I grid tariff | - | Modelled |
| Power cut events / year | - | Planning seed |
| Average power cut | - | Planning seed |
One number drives the whole model. Use the average of the last twelve months of fuel invoices, not a busy month and not an estimate.
Load factor is the quiet lever. Most standby sets are oversized and run at 30 to 40% load, where diesel becomes more expensive per unit. That widens the spread by ₹3 to ₹4/kWh. Badly loaded gensets are the best sites.
| Specific fuel consumption at this load | - |
| All-in cost of a diesel unit | - |
| All-in cost of a stored grid unit | - |
| Spread you are paid on | - |
| Site load during a power cut (implied) | - |
This is the step that decides the deal. A battery cannot cycle more often than the grid fails, so frequency beats duration. Two sites with identical fuel bills can be a 1.8-year payback and a 3.3-year one.
Every DSE, ComAp or Cummins PowerCommand controller keeps a lifetime start counter and an engine hours reading. Two numbers off the panel beat any estimate, any DISCOM report and any recollection.
| DG run hours per year | - |
| Mean recharge window between events | - |
| Cycles per year (capped at events) | - |
Grid electricity is our input cost, because every unit we displace has to be bought back and stored. It is also the number moving against us: DERC went to monthly PPAC revisions in June 2026 and commercial users are seeing increases of 7 to 18%.
The system is a 1 hour, 1C battery by design. Payback bottoms out at exactly one hour and stays flat from 0.75 to 1.5 hours, so we build one standard SKU per power class rather than sizing bespoke.
| Annual savings build | ₹ / year |
|---|
The genset does not go away. It continues to cover long power cuts. What changes is how many of its units you pay diesel prices for.
A grid-tied array stops the moment the grid does, and it cannot be left running on the genset either. This is what changes when there is something on site that can hold a reference and absorb what the array pushes out.
| Additional annual saving from the array you already own | ₹ / year |
|---|
Every figure on this page is modelled from belt averages and the inputs above. We do not ask you to sign against a model, and we do not ask you to take our power cut assumptions on trust. We measure your site first, at our cost. From this page to a commissioned system is four weeks.
Why we insist on this. The economics of displacement turn almost entirely on how often your grid actually fails, not on how much diesel you burn. Two plants with identical fuel bills can be a 1.8-year payback and a 3.4-year one. Published DISCOM reliability figures cannot settle it: they exclude short interruptions, they are licence-area averages, and half of India's DISCOMs publish nothing at all. Only your own site data settles it, so that is what we write the guarantee on.
What your licensee publishes, what they don't, and the three routes to the number this model actually needs.
Everything above is a floor, not a best case. Four sources of value are excluded from the model entirely:
We quote on the diesel arbitrage alone because it is the one thing we can meter, and therefore the one thing we can guarantee.