Energy Strategy for AI Data Centers
For an AI data center, electricity is the largest controllable operating cost — and the line that decides whether the campus can credibly claim to run on clean energy. Lowest cost and highest renewable content are usually assumed to be in tension. Good energy strategy and power management reconcile them.
The price on a power purchase agreement is not your cost of power. Delivered cost is the PPA tariff plus cross-subsidy and additional surcharges, transmission and wheeling charges, losses, deviation penalties, banking and standby charges — minus surplus sales and renewable certificates. A careless decision at the concept stage can add one to two rupees per unit for the life of the asset.
Right-size grid connectivity
A 250 MW load can only ever draw 250 MW. Booking 250 MW each through the state grid, the central grid and the DISCOM reserves 750 MW of network capacity — and you pay for it. We design one connectivity path sized to peak drawal plus margin, a deliberate backup supply contract, and storage sized for its highest-value uses.
Build the portfolio to energy, not megawatts
Renewables are contracted to deliver your target GWh, not to match your MW. Solar is the cheapest energy but disappears at night; round-the-clock (RTC) renewable power behaves almost like firm supply but costs more; wind fills part of solar's gap. In a worked example for a 250 MW campus targeting 70% clean energy, three portfolios all clear the target — and the cheaper they get, the more the savings depend on operational capability.
Forecasting, scheduling, energy banking and a well-specified battery are what let an operator lean on Rs 2.75–3.75 variable renewables instead of paying for firm RTC power — while keeping the lights on at 3 a.m.
Annual or 24/7 matching
"70% clean" on an annual basis is not the same as 70% hourly-matched carbon-free energy. Midday solar surplus does not cover a 2 a.m. shortfall. We settle which standard applies at the concept stage, because it changes storage sizing and the share of firm RTC supply.
Buy the power or own the plants
For a large, steady load, group captive ownership is often the single most valuable structural decision. Holding at least 26% of the generating company's equity and consuming at least 51% of its output exempts the load from cross-subsidy and additional surcharges. In our worked example, the savings on about 1,380 GWh a year repay the equity in three to four years — provided the 26%/51% tests are met continuously.
Storage that earns its keep
A battery specified only as backup is expensive and under-used. We size storage for stacked value — shifting solar into the night, shaving demand peaks, providing ride-through, and earning ancillary-service revenue — with gensets or firm contracts for long outages.
How IWE helps
- Delivered-cost modelling of grid, open-access and captive options
- Renewable portfolio design: solar, wind, RTC, storage and certificates
- Group captive structuring and compliance planning
- Battery sizing and power-management strategy from long-term planning to day-ahead scheduling
