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

If you have completed both the MCS self-consumption calculation and the Easy PV consumption calculation in the project, both figures will appear as options when you open the Financial task in Easy PV.

The MCS method is calculated end of the Performance task for easy-pv.co.uk and the Easy PV method is calculated in the Consumption task. Both are acceptable methods for calculating the self-consumption, you are free to choose either calculation. You can read more about the differences here.