Free corporate power tool
PPA and wheeling savings calculator.
Compare the buyer’s current grid-only cost with a wheeled renewable supply case after PPA energy, network and service charges, and residual grid supply.
What this first-pass comparison includes
The grid-only case is annual load multiplied by the benchmark tariff. The wheeled case adds PPA energy, network and service costs on delivered renewable energy, plus residual grid supply for the part of the load not covered by renewable delivery.
- It assumes annual energy quantities rather than interval settlement.
- Demand charges, time-of-use shape, surplus treatment, imbalance, taxes and tariff-block effects are not modelled separately.
- The break-even PPA price is the PPA energy price that leaves the buyer level with the grid-only benchmark on the assumptions entered.
When annual MWh is not enough
Most real wheeling questions are about timing.
Two cases can have the same annual renewable share and very different buyer savings. Half-hourly or hourly load, generator profile, time-of-use tariffs, demand charges, loss factors and settlement rules decide how much energy actually offsets the expensive parts of the bill.
Read the wheeling economics guide or inspect the public PPA and wheeling model.
Use actual bills and interval data
Want the delivered-cost case rebuilt from the real tariff and load profile?
Send the buyer bill, interval data, proposed PPA price and the network or trader assumptions you have.