Net Billing Savings Calculator Pakistan: 2026 NEPRA Rules

By PSI Editorial • June 8, 2026

Atomic Summary: In February 2026, NEPRA officially replaced the old net metering system in Pakistan with a new Net Billing framework. Under the new regulations, excess solar energy exported to the grid is no longer offset 1-to-1 against off-peak imports; instead, it is credited at a slashed wholesale rate of approximately Rs 8.13 per unit. Meanwhile, electricity imported from the grid is billed at the full retail rate of Rs 50 to Rs 65 per unit. To maximize savings, Pakistani solar owners must prioritize self-consumption (using solar energy directly during daytime) and consider hybrid inverter systems with batteries to avoid expensive night-time grid imports.

In February 2026, the National Electric Power Regulatory Authority (NEPRA) in Pakistan implemented a major policy shift that completely transformed the rooftop solar market. The traditional net metering program, which allowed homeowners to offset electricity bills on a one-to-one basis or receive a high credit for excess power exported to the grid, was officially replaced by a new net billing framework. This regulatory update has caused widespread confusion among solar consumers in cities like Lahore, Karachi, Islamabad, and Multan. Homeowners who installed solar systems under the old rules are now wondering how their savings will be calculated, while prospective buyers are questioning whether solar remains a viable investment.

Under the previous model, homeowners could count on distribution companies (DISCOs), such as LESCO, K-Electric, IESCO, or MEPCO, to credit exported off-peak units at a rate that aligned with the national average power purchase price, which was around Rs 20 to Rs 25 per unit. This made achieving a zero electricity bill simple. By installing a solar system that generated slightly more electricity than the household consumed over a year, consumers could wipe out their bills. However, the February 2026 net billing reform has slashed the export credit rate to a flat, wholesale price of approximately Rs 8.13 per unit. Meanwhile, the cost of importing electricity from the national grid remains high, ranging from Rs 50 to Rs 65 per unit depending on the billing slab, peak hours, and taxes. To read more about the differences between these billing frameworks, check our detailed comparison on gross metering vs net metering.

The Mechanics of the Net Billing Calculator

To calculate your monthly solar savings under the 2026 regulations, you must first understand how a bi-directional green meter tracks electricity. Unlike a standard electric meter that only measures the power flowing from the grid into your home, a green meter records two separate streams of energy: import and export.

Import refers to the electricity you draw from your local distribution company during hours when your solar panels are not producing power, such as at night, during heavy cloud cover, or during intense winter smog in cities like Lahore and Faisalabad. Export refers to the excess electricity generated by your solar panels during peak sunlight hours. This is the power that your home does not immediately consume, which is sent back into the grid for other consumers to use.

Under the net billing framework, your DISCO does not subtract exported units from imported units. Instead, it performs a financial calculation. Every unit of electricity you import is billed at the full retail rate, including all applicable taxes, fuel price adjustments, and surcharges. Conversely, every unit of electricity you export is converted into a cash credit using the new NEPRA export tariff of Rs 8.13 per unit. At the end of the billing cycle, the total cash credit from your exports is deducted from the total cost of your imports. Because the retail import rate is six to eight times higher than the export credit rate, generating a cash surplus is difficult. For more information on the current regulatory status, read our update on whether net metering is banned in Pakistan.

The Golden Rule: Prioritizing Self-Consumption

The massive gap between the retail import tariff (Rs 50 to Rs 65 per unit) and the solar export credit (Rs 8.13 per unit) has established a new golden rule for solar owners in Pakistan: maximize self-consumption. Self-consumption refers to using your solar energy directly inside your home as it is being generated, preventing it from ever passing through the green meter into the grid.

When your solar panels are active and you turn on an appliance, that appliance runs on free solar electricity. By doing this, you avoid importing a unit of electricity from the grid. Since grid electricity costs up to Rs 65 per unit during peak hours and around Rs 55 per unit during off-peak hours, every unit of solar power you consume directly saves you Rs 55 to Rs 65. On the other hand, if you turn off your appliances during the day and export that same unit of solar power to the grid, you will only receive a credit of Rs 8.13. By exporting instead of self-consuming, you lose the opportunity to save over Rs 45 per unit. Therefore, the financial value of self-consumed solar electricity is six to eight times higher than the value of exported solar electricity.

To put this into perspective, homeowners must shift their heavy energy usage to the middle of the day. Running heavy loads like water pumps, laundry machines, electric irons, and inverter air conditioners between 10:00 AM and 3:00 PM is the single most effective way to lower your electricity bill. This is especially true during Pakistan's blistering summers, where temperatures frequently exceed 45 degrees Celsius, driving up cooling demands.

Comparison: Old Net Metering vs. New Net Billing in Pakistan

To help you visualize how the regulatory landscape has changed, the following table compares key aspects of the old net metering system with the new net billing system:

Worked Mathematical Example for a 10 kW System in Lahore

Let us look at a detailed mathematical breakdown to illustrate how net billing affects a household in Lahore. We will analyze a standard 10 kW solar system, which generates an average of 1,200 units of electricity per month. We will compare two different households: House A, which continues with old energy habits and exports most of its solar power, and House B, which optimizes its self-consumption.

Assume the current retail tariff is Rs 55 per unit for off-peak grid imports and Rs 65 per unit for peak grid imports (which run from 5:00 PM to 10:00 PM in the summer). The NEPRA solar export credit is flat at Rs 8.13 per unit.

House A: Low Self-Consumption (High Grid Export)

The residents of House A are away during the day. They do not run any heavy appliances while the sun is shining, resulting in a low daytime self-consumption of only 200 units. The remaining 1,000 units generated by their 10 kW system are exported to the grid. At night, they return home and import 600 off-peak units and 150 peak units from LESCO to run lights and air conditioners.

The calculation is as follows:

• Imports: 600 off-peak units multiplied by Rs 55 (Rs 33,000) and 150 peak units multiplied by Rs 65 (Rs 9,750). Total import cost is Rs 42,750 before taxes.
• Exports: 1,000 units exported multiplied by the Rs 8.13 rate. Total solar credit is Rs 8,130.
• Net Bill before taxes: Rs 42,750 minus Rs 8,130 equals Rs 34,620.

After adding approximately 25% for government taxes, duties, and retail surcharges on the imported units, House A receives a final bill of approximately Rs 43,275. Despite having a premium 10 kW solar system, they still pay a substantial amount because they exported their energy for cheap and bought expensive grid energy at night.

House B: High Self-Consumption (Optimized Load-Shifting)

The residents of House B actively practice load-shifting. They run their water pump, laundry, and inverter air conditioners during the day. As a result, they self-consume 700 units of solar electricity directly, exporting only 500 units of excess solar power to the grid. Because they ran heavy appliances during the day, their night-time imports from LESCO drop to 100 off-peak units and 150 peak units.

The calculation is as follows:

• Imports: 100 off-peak units multiplied by Rs 55 (Rs 5,500) and 150 peak units multiplied by Rs 65 (Rs 9,750). Total import cost is Rs 15,250 before taxes.
• Exports: 500 units exported multiplied by the Rs 8.13 rate. Total solar credit is Rs 4,065.
• Net Bill before taxes: Rs 15,250 minus Rs 4,065 equals Rs 11,185.

After adding the same 25% for taxes and surcharges, House B receives a final monthly bill of approximately Rs 13,980. By shifting their energy usage to match solar generation hours, House B saved Rs 29,295 compared to House A. This mathematical reality proves that energy management is just as important as the solar panels themselves under the 2026 net billing rules. To analyze how this affects the long-term returns on your system, read our guide on the payback period of a 10kW solar system in Pakistan.

The Role of Batteries and Hybrid Inverters

Given the low export rate under net billing, many Pakistani homeowners are turning to battery storage to bridge the gap. By adding a battery bank to a hybrid inverter, you can store your excess daytime solar electricity instead of exporting it to the grid for Rs 8.13. Then, during the evening and night, your home runs on stored battery power instead of importing electricity from the grid at Rs 55 per unit.

This strategy effectively increases the value of your excess solar units from the Rs 8.13 export credit to the Rs 55 retail import rate. However, battery storage comes with a significant upfront cost. A quality lithium iron phosphate (LiFePO4) battery pack or a set of deep-cycle tubular batteries will increase the initial cost of your solar installation. While tubular batteries are cheaper initially, they have a shorter lifespan of 3 to 5 years and require regular maintenance. Lithium batteries are more expensive but last 10 to 12 years and handle heat better, which is crucial during 45 degrees Celsius summers. For a detailed analysis of battery financing and upfront costs, you can consult our calculator for Meezan Bank solar financing.

Step-by-Step Recommendations for Solar Buyers in Pakistan

If you are planning to install a solar energy system or upgrade an existing one under the 2026 net billing rules, follow these five essential recommendations:

1. Size your system to match your daytime base load. Rather than oversizing your solar panel array to export as much power as possible, focus on a system capacity that aligns with what your home actually consumes during peak sunlight hours.
2. Automate and schedule heavy appliances. Use smart timers or manual scheduling to run water filtration systems, washing machines, and pool pumps between 10:00 AM and 3:00 PM.
3. Invest in a hybrid inverter. Even if you cannot afford battery storage immediately, installing a hybrid inverter ensures that your system is ready to receive batteries in the future without needing an expensive inverter replacement.
4. Minimize peak hour grid consumption. Peak hours (5:00 PM to 10:00 PM) carry the highest electricity rates. Ensure that heavy appliances are strictly turned off during this window.
5. Work with AEDB-certified installers who have experience with the new 2026 green meter application process to ensure smooth coordination with your local DISCO.

Frequently Asked Questions