There is no single electricity price
A venue bill can include energy charges, demand charges, time-of-use periods and other adjustments. Solar affects each part differently, so one average price per kilowatt-hour can hide the real value.
Match production with the bill clock
Look at when solar is produced and when the expensive parts of the tariff occur. A kilowatt-hour at noon may be worth something different from one in the early evening. If a battery is part of the plan, compare the tariff with the storage-use priorities.
Keep the assumptions on the page
If the model depends on tariff escalation, export credit or a demand-charge reduction, show those assumptions next to the result. It should be easy for a reader to understand why the answer changes.
Use ranges, not promises
A good early model shows what happens under conservative, central and optimistic assumptions. For the cost side, pair it with the complete project-cost guide.
Build the business case from the actual tariff and the venue’s load pattern. Keep assumptions visible so the result is easy to challenge and update.
