Open-Access Sizing — Recommendation Summary — Sample Industries Limited (illustration)

Every interval in this dataset is tagged MODELLED — none of it is metered data. The consumption shape is reconstructed, not measured, so treat the figures as an illustration of the method rather than a reading of this site. Generation is a reference profile standing in until the site’s own resource data is available — so the figures below demonstrate the method on this load, and are not numbers to contract on.

What we did

We ran the sizing tool against Sample factory, Maharashtra’s own consumption profile, sweeping solar capacity from 0–12 MW and wind capacity from 0–12 MW together, then sizing battery storage on top of the best combination found. Every point in the sweep is priced through the same full annual billing simulation used for the final bill — not a shortcut — so the recommendation below reflects Maharashtra’s actual open-access tariff, wheeling, banking and demand-charge rules as they apply to this load shape across a full year.

Recommended configuration

Recommended mix	3 MW solar + 2 MW / 2h battery storage
25-year NPV	Rs 10.44 Cr
Year-1 saving	Rs 78.67 L
Year-1 bill with this mix	Rs 650.11 L
Grid-only bill (no open access at all)	Rs 737.44 L
Effective tariff, this mix	Rs 10.8357/kWh
Effective tariff, grid-only	Rs 12.2912/kWh
Renewable share of consumption	47.6%

Why this configuration

Solar alone is already worth Rs 8.87 Cr of 25-year NPV at its own best size. Adding wind does not improve on that here: the sweep’s best combination uses no wind at all, so the recommendation is a solar case. Storage adds a further Rs 1.57 Cr on top.

A note on the data behind this run

Demand netting is capped by the contract-demand floor. On 27 occasions across the year, generation that would otherwise have reduced recorded demand bought nothing, because the contract-demand floor binds ahead of it — between roughly 0 and 822 kVA depending on the period. Reducing contract demand is what would unlock it, at the risk of penal excess-demand charges the first time load exceeds the lower limit.
No reference consumption figure was supplied, so the incremental-consumption rebate is not billed. Because it is a credit, leaving it out overstates the cost of licensee supply and therefore understates the benefit of open access — the omission is conservative, not optimistic. The reference figure appears on the consumer’s own bill.
5,407 kWh of banked energy lapses unused each cycle. The consumer paid the PPA rate on these units and receives nothing for them. This is the single clearest signal to down-size the plant or add storage.