How to Read a K-Electric Net Metering Bill
By PSI Editorial • June 8, 2026
Atomic Summary: Your solar panels export power during "Off-Peak" daylight hours, which K-Electric deducts from your off-peak imports. However, you are charged full price for "Peak" units consumed between 6 PM and 10 PM. Excess off-peak units roll over monthly and are converted into a PKR credit quarterly based on the National Average Power Purchase Price (NAPPP).
You finally got your green meter installed in Karachi, and your solar system has been generating massive amounts of electricity. But when your first K-Electric (KE) net metering bill arrives, it is a confusing maze of "Import," "Export," peak hours, and mysterious adjustments. Why is your bill not zero, and what do all these numbers mean?
In this comprehensive guide, we will break down exactly how to read and calculate your K-Electric net metering bill, ensuring you maximize your savings and understand the financials behind your solar investment in Pakistan.
The Core Concepts: Import vs. Export
To understand your green meter bill, you must first master the two main directions of electricity flow:
- Import Units: This is the electricity you take from the K-Electric grid. This happens at night, during heavy cloud cover, or when your home requires more power than your solar panels are producing.
- Export Units: This is the surplus electricity your solar system generates during sunny hours that your home does not immediately use. This excess power is pushed out to the KE grid.
At the end of your billing cycle, KE calculates your bill based on the net difference between these two values.
Understanding Peak vs. Off-Peak Hours
K-Electric utilizes a Time-of-Use (ToU) tariff. This means that the cost of electricity changes depending on the time of day. This is the single most critical factor that confuses new solar owners.
The Time-of-Use Schedule
Your bill is divided into Peak and Off-Peak categories:
| Season | Peak Hours (High Cost) | Off-Peak Hours (Low Cost) |
|---|---|---|
| April to October | 6:30 PM – 10:30 PM | All remaining 20 hours |
| November to March | 6:00 PM – 10:00 PM | All remaining 20 hours |
⚠️ IMPORTANT: Solar panels do not generate electricity during the evening Peak Hours. Therefore, any electricity you consume between 6 PM and 10 PM will always be Imported Peak Units, which are charged at the highest possible tariff rate.
The Netting Process: How Calculations Work
Under NEPRA (National Electric Power Regulatory Authority) guidelines, K-Electric processes your units using a specific formula.
1. Off-Peak Netting
Because solar only produces energy during the day (which falls entirely within the off-peak window), all your exported units are classified as Off-Peak. K-Electric subtracts your Off-Peak Export from your Off-Peak Import.
If you exported 800 units and imported 300 off-peak units, you have a surplus of 500 off-peak units. These 500 units roll over to the next month to cover future off-peak usage (like running heaters in the winter).
2. Peak Unit Billing
You cannot directly subtract off-peak export units from peak import units. If you imported 150 Peak units, you will be billed for 150 Peak units at the current NEPRA peak tariff rate, plus applicable taxes.
3. Quarterly Adjustments (The Financial Credit)
What happens to your massively accumulating off-peak surplus? Every quarter (3 months), K-Electric takes your accumulated off-peak excess and monetizes it. They convert these units into Pakistani Rupees (PKR) at the National Average Power Purchase Price (NAPPP), which is typically lower than the retail rate.
This PKR credit is then applied to your bill and CAN be used to offset your Peak hour charges, fixed meter fees, and other taxes. This is how you achieve a "negative" or zero bill over a full quarter!
Step-by-Step Guide to Verifying Your Bill
Follow these steps to check KE's math:
Step 1: Check the Meter Readings Section
Look at the "Present Reading" and "Previous Reading" columns. You will see rows for Peak Import, Off-Peak Import, and Off-Peak Export. Subtract the previous from the present to find the units for the current month.
Step 2: Find the Net Units
Locate the "Net Off-Peak Units" row. It should equal your Off-Peak Import minus your Off-Peak Export. If the number is negative, it means you have a surplus.
Step 3: Review the Charges Calculation
In the financial breakdown, you will see your Peak units multiplied by the Peak tariff rate. You will also see your Net Off-Peak units multiplied by the Off-Peak rate (if you imported more than you exported).
Step 4: Note the Taxes and Adjustments
Even with zero net consumption, you might see charges for Fuel Charge Adjustments (FCA), General Sales Tax (GST), TV fee, and fixed meter rent. Ensure these align with NEPRA's current notifications.
How to Eliminate Your Bill Entirely
If you are frustrated by the heavy peak hour charges from 6 PM to 10 PM, the only solution is energy storage. By adding a hybrid inverter and lithium batteries to your setup, you can store your excess daytime solar power and use it during peak hours, completely avoiding the expensive K-Electric peak grid.
To understand if this investment makes sense for your home, check our comprehensive battery cost-benefit and comparison guide.
Frequently Asked Questions
Why is my K-Electric net metering bill not zero?
Your bill might not be zero because of Peak Hour consumption (usually 6 PM to 10 PM), which is charged at the full, higher rate. Additionally, fixed meter charges, taxes, and Fuel Charge Adjustments (FCA) still apply even if your net units are zero.
How are excess solar units paid by K-Electric?
Excess off-peak units are carried forward month-to-month. Every quarter (3 months), surplus off-peak units are monetized at the National Average Power Purchase Price (NAPPP) and credited to your bill in PKR to offset other charges.
Can solar off-peak units offset peak hour charges?
Not directly unit-for-unit. Off-peak export units only offset off-peak import units. However, at the end of the quarter, any surplus off-peak units are converted to a financial PKR credit, which can then offset peak hour charges.