Off-peak import
Electricity drawn from the grid in off-peak hours
Solar · Net Metering
Know your true energy balance.
Enter your meter and bill readings — we instantly turn your peak & off-peak imports, solar exports and rollover surplus into a single, honest net figure.
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#8
Peak import
Electricity drawn from the grid in peak hours
Off-peak export
Solar energy sent back to the grid
Previous surplus
Credit carried forward from your last bill
The guide
Understanding net metering & your solar calculator
What is net metering?
Net metering lets solar owners earn credit for the surplus electricity their panels send back to the grid. When your system produces more than your home consumes, the extra energy flows outward and is recorded on your bidirectional meter — offsetting the units you later import.
How this calculator works
It separates the three things your net meter records and combines them into one balance:
- Imports (peak & off-peak): the units you pulled from the grid, split by time-of-use rate.
- Solar export: the units you sent back, with an optional deduction for utility losses or fees.
- Previous surplus: any credit carried over from your last billing cycle.
Net surplus = (Export − deduction) − (Off-peak import + Peak import) + Previous surplus
Reading your bidirectional meter
On the net meters used across Pakistan, three registers matter: #8 off-peak import, #6 peak import and #5 off-peak export. Enter each present reading and the figure printed on your last bill — the difference is your usage since that bill.
Tips to maximise your credit
- Shift heavy appliances (washing, EV charging) to daylight hours when your panels are producing.
- Keep panels clean — dust and shade quietly erode export units.
- Track your surplus every billing cycle so seasonal swings balance out across the year.
Questions
Net metering, answered
What is net metering?
Net metering is a billing arrangement that credits solar owners for the surplus electricity they export to the grid. Those credits offset the electricity you import, lowering your bill.
How is my net surplus calculated?
Net surplus = (solar export after the deduction percentage) − (off-peak import + peak import) + your previous surplus. A positive result is a credit; a negative result is the amount you owe.
What do the meter registers #5, #6 and #8 mean?
On a bidirectional (net) meter — common in Pakistan — register #8 is off-peak import, #6 is peak import and #5 is off-peak export. Enter each reading into its matching field.
Is my data stored anywhere?
No. Every calculation runs entirely in your browser and is saved only to your own device’s local storage. Nothing is uploaded to a server.
Does a positive surplus mean free electricity?
A positive surplus means you exported more than you imported, earning credits you can carry forward. Fixed charges, taxes and meter rent may still apply on your bill.
Learn the rules behind the numbers
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