Why do some of the financial savings appear to be different on the Customer Proposal and Easy PV Project Report?

Easy PV uses two different methods of calculating financial savings. 1) We do a basic calculation to work out a headline year one/first year saving figure that can be used on proposal summaries, etc. This calculation doesn’t take into account inflation or degradation rate. 2) We calculate a financial forecast showing payback for a longer period (25 years by default). This takes into account inflation, degradation, and discount rates. In the first year, we apply half the % values for each of these rates rather than the full % value.