Community solar subscription calculator
One subscriber's credit, fee and net saving over a year, and the project's fee income.
A teaching aid. The presets are invented, not a tariff or a quote. The credit is a flat rate per kWh, the monthly output shape is the invented one used on the page, and use is flat across the year. Use a comma or a point for decimals, for example 0,14.
| Result | Value |
|---|---|
| Output allocated to the subscriber, kWh a year | |
| Allocation as a share of the subscriber's annual use | |
| Credit applied to bills, USD a year | |
| Credit lost, kWh a year | |
| Fees paid, USD a year | |
| Net saving, USD a year | |
| Net saving as a share of the credit value of all allocated kWh | |
| Months with a negative net | |
| Credit still banked at year end, kWh | |
| Project fee income if this share of the project is subscribed, USD a year | |
| Fee income for each point of the project subscribed, USD a year |
Fees are charged on every allocated kWh, including credit that is lost. Fixed monthly fee = fee per kWh times annual allocated kWh divided by 12. Fixed charges on the utility bill are not modelled. Fee income is before any project cost.
Month by month
| Month | Allocated kWh | Credit applied kWh | Credit USD | Fee USD | Net USD |
|---|