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Simple Solar Cash Payback Calculator

Compare net upfront cost with constant annual benefits and costs; handle zero outlay, nonpositive savings and the chosen horizon explicitly.

Use this result well

Inputs that matter
Upfront cash cost, Verified upfront receipts, Annual bill benefit, Annual recurring cost, and 2 more
Output to expect
Simple cash payback
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Simple cash payback

Compare actual upfront cash cost and upfront incentives with a constant annual bill benefit and recurring cost. Keep later incentives, financing and replacements in a dated cash-flow model.

Net upfront outlay = cash cost − upfront receipts; annual net benefit = bill benefit − recurring cost; simple payback = positive outlay / positive annual net benefit.

Updated: September 2026

Example Scenarios

Try this example to see the calculation, then enter actual documented values and preserve the measurement conditions. A failed or unresolved comparison is part of the record.

→ 10.588235 years simple payback

FAQ

Compare actual upfront cash cost and upfront incentives with a constant annual bill benefit and recurring cost. Keep later incentives, financing and replacements in a dated cash-flow model.

Use the exact equipment data, measurement point, operating conditions and units described in the selected mode. Record source documents, dates and unresolved conditions in Sources and assumptions. Built-in examples illustrate arithmetic; they are not manufacturer ratings or approved designs.

Use Save planning case for an explicit local history entry. Copy MD keeps current inputs and notes; Download CSV exports the result breakdown. Export portable copies before clearing storage and save a separate case after changing equipment, conditions or measurements.

About Simple Solar Cash Payback Calculator

Compare actual upfront cash cost and upfront incentives with a constant annual bill benefit and recurring cost. Keep later incentives, financing and replacements in a dated cash-flow model.