Is this calculator free?

Yes — free, no sign-up, no reference number required.

Which tariff year is this based on?

The most recent NEPRA notification for 2025-26. We update whenever NEPRA revises rates.

K-Electric's tariff mirrors the national inclining-block structure, so the estimate applies with a small margin of error.

SOLAR

Enter export units and buy-back rate; get monthly credit and payback.

Units exported to gridUnits imported from gridBuy-back rate (Rs./unit)NEPRA sets this quarterlyImport rate (Rs./unit)

Export credit — 300 unitsRs. 8,100

Import cost — 150 unitsRs. 6,300

Net payableRs. 1,800 credit