Why are there two consumption figures to choose from in the financial task?

If you have completed both the MCS self-consumption calculation (end of the performancePerformance task)task for easy-pv.co.uk) and the Easy PV consumption calculation (consumptionConsumption task)task) in the project, both figures will appear as options when you open the Financial Tasktask in Easy PV.

Both are acceptable methods for calculating the self-consumption, you are free to choose either calculation.