Solar ROI & Payback Calculator
How long until your solar system pays for itself? Enter your cost and rates — get the answer instantly.
Monthly units auto-update when you change the size (kW × 120).
Prosumer Regulations 2026 cap the system at 100% of sanctioned load.
Monthly Savings
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Simple Payback
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Annual ROI
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5-Year Contract Savings
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Your system size exceeds 100% of your sanctioned load. Under NEPRA Prosumer Regulations 2026, new systems are capped at 100% of sanctioned load — savings below are calculated on the capped size.
Note: Under NEPRA Prosumer Regulations 2026 (S.R.O. 251(I)/2026), exports are credited at ~Rs 11/unit, imports are billed at the full retail tariff, and contracts run 5 years. Rates are approximate — edit them to match your bill.
How to use
- Enter the total system cost, size (kW) and your sanctioned load (kW) — monthly units auto-set to kW × 120; you can change it yourself if you want.
- Set how much electricity is used at home (self-use %) and how much is exported.
- See monthly savings, payback period, ROI and 5-year contract savings instantly.
Want to install solar or need a free survey? Contact Azlaan Electric AC Solar Center, Faisalabad — 0300-8987448.