Solar Electricity
Solar Payback Calculator
Use Solar Payback to the simple payback calculation. The loaded example shows the arithmetic with practical electrical units.
Enter values for simple payback
Use one consistent electrical operating case for all fields.
How Solar Payback works
The stated formula is payback = cost ÷ annual savings. Solar Payback uses Installed cost, Annual savings to report Simple payback. Use Solar Array Configuration Calculator to a separate total modules calculation.
With the loaded values, simple payback evaluates to 8.75 years. A second case makes the effect of one changed measurement visible.
Inputs for Solar Payback
Installed cost and Annual savings belong to Solar Payback. Keep source units with installed cost.
No recommendation is implied by the loaded example. Use measurements from the intended scenario.
- Installed cost
- Example entry: 14000 $.
- Annual savings
- Example entry: 1600 $/year.
Reading the Solar Payback result
This output represents Solar Payback.
The result informs selection but does not approve a component or installation.
Measurement and units
Use site-specific irradiance, temperature, shading, equipment limits, and measured system losses. Check prefixes on installed cost.
Preserve the measurement basis when testing alternatives.
Limits of this calculation
Financing, maintenance, degradation, and tariff changes are omitted. Use Solar DC Cable Loss Calculator.
Treat the formula as one part of the overall electrical analysis. Unentered effects remain outside Solar Payback.
Solar Payback record notes
Record source and operating details for installed cost. Continue to Off-Grid Solar Array Calculator for required array size.
Retain raw simple payback beside its selected rating.
Questions about Solar Payback
What does Solar Payback calculate?
Solar Payback reports simple payback.
Can Installed cost be zero?
For Solar Payback, measure any zero installed cost directly.