Total upfront cost
Capital and annual benefit · PKR
Allowed range: 0 to 1000000000000
Solar Simple Payback Calculator
Compare an entered capital outlay with annual net savings.
Open this toolSimple payback compares the initial outlay with a constant yearly net saving. It is a first recovery measure rather than a full investment model.
Enter installation cost, annual value and yearly expenses. Read the period only when net savings are positive.
Inputs and controls
Annual gross savings
Capital and annual benefit · PKR/year
Allowed range: 0 to 1000000000000
Annual extra cost
Capital and annual benefit · PKR/year
Allowed range: 0 to 1000000000000
How to use
- Enter total upfront cost, annual gross savings and annual extra cost.
- Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
Why use this tool
The explicit net saving helps you see how maintenance or other annual costs change the basic recovery estimate.
Before relying on the result
Simple undiscounted payback assumes constant annual savings and costs. It ignores financing, degradation, replacement timing and tariff changes. Nonpositive net savings has no finite payback.
Tool limitations
Simple undiscounted payback assumes constant annual savings and costs. It ignores financing, degradation, replacement timing and tariff changes. Nonpositive net savings has no finite payback.
Questions
Does payback include financing or degradation?
No. Those require a more detailed cashflow model rather than this constant annual calculation.
What should I check before using Solar Simple Payback Calculator?
Check Total upfront cost, Annual gross savings and Annual extra cost. Use the exact units shown beside the controls and replace any example values with your own inputs.
Source page last modified: 2026-10-01T18:56:36+00:00. This profile describes the tool; use its page to run it.
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