This spreadsheet tool calculates the payback periods of solar PV installation if installed now, in 5 years or in 10 years time. Inputs include PV system cost, specifications and generation; building electricity use; electricity tariffs over time; discount rate and finance period, amongst others. The instructions on the use of this tool can be found in the “Guide on Municipal Revenue Impact from Renewable and Energy Efficiency Tools” available for download on this webpage (Sustainable Energy Africa, 2014).
