Export
About Rs 11 per exported unit
New connections are paid roughly the national average energy purchase price for exports, down from Rs 22 to 27 under the old rules.
Mastoor Energy · Calculator
Solar ROI calculator
Enter your bill. The calculator suggests a system and its market cost, then shows what you save each month, when the system has paid for itself, and the return over 25 years.
Method
How the return is calculated
Your bill, before and after. The calculator rebuilds your bill from the residential tariff (S.R.O. 279(I)/2026, effective February 2026), including the fixed charge, fuel and quarterly adjustments, the financing surcharge, electricity duty and 18% GST. It then rebuilds it again for the smaller number of units you would buy with solar.
The slab effect. A non-protected home pays the rate of the slab its month lands in on every unit. Solar often drops you one or two slabs, so the units you still buy also get cheaper. This is a large part of the saving and most simple calculators miss it.
Self-use and export. Solar you use directly replaces units at the full tariff. A battery shifts some surplus into the evening. Whatever is left over is exported and earns about Rs 11 per unit under net billing, which needs a three-phase connection.
Over time. Panel output falls by 0.5% a year. Grid tariffs are assumed to rise 5% a year. Upkeep is set at 1% of the system cost per year. You can change all three under "Assumptions you can change".
Payback is the point where cumulative savings equal what you paid. Net gain is total savings over 25 years minus the cost.
Net billing, 2026
What changed, and why it matters here
NEPRA's Prosumer Regulations replaced net metering for new connections from 9 February 2026.
Import
Full tariff on what you buy
Units taken from the grid are billed at the normal rate, up to Rs 47.20 per unit before taxes in the top slab.
Terms
Five-year agreements
Contracts run for 5 years and are renewable. A concurrence fee of Rs 1,000 per kW applies.
What to do
Size for your own use
Use as much of your solar as you can yourself. A hybrid system with a battery usually beats a large on-grid system built to export.
Questions
ROI calculator FAQ
01 · FAQ
What is a typical payback for solar in Pakistan now?
It depends on your bill and how much of your use is in daylight. Homes with large bills in the higher slabs often recover the cost in two to four years. Try your own numbers above.
02 · FAQ
Is solar still worth it after net metering ended?
For most homes with bills in the higher slabs, yes. The return now comes mainly from the units you stop buying, not from exports. Sizing the system to your own use matters more than before.
03 · FAQ
What does "share used during daylight" mean?
The part of your electricity you use while the sun is up. A home that is empty in the day might be at 25%. An office, shop or factory can be 70% or more. The load calculator works it out from your appliances.
04 · FAQ
Why is the bill with solar sometimes shown as a credit?
If the value of your exports is more than what you still buy from the grid, the difference is a credit. Check with your distribution company how credits are settled.
05 · FAQ
I had net metering before February 2026. Does this apply to me?
No. Agreements signed before the change keep their terms until they expire. This calculator models the new rules for new connections.
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Turn the estimate into a quote
Send us your result on WhatsApp. We will confirm the system size against your roof and give you a firm price.