Your first UPPCL electricity bill after going solar looks nothing like the bill you received for the previous ten years. New line items have appeared, familiar ones have changed, and the total at the bottom is either dramatically lower or, confusingly, higher than you expected. New solar owners in Lucknow, Kanpur, and Barabanki regularly contact their installers after receiving that first net metering bill because they cannot tell whether the bill is correct or not. This guide walks through every component of a post-solar UPPCL bill, explains what each line means, and shows you how to spot a genuine error.
The New Bill Breakdown: Line by Line
Import Units (Consumed from Grid)
This is the number of units your home drew from the UPPCL grid during the billing period. Before solar, this was the only consumption figure on your bill, and energy charges were applied to it directly. After net metering, it is still recorded, but it is no longer the figure used to calculate your energy charges.
Export Units (Injected to Grid)
This is the number of units your solar system sent back to the UPPCL grid during the billing period. This figure comes from your bidirectional net metering meter, not from your inverter app. Export units are the credit your solar system has earned from the grid. If this line is missing from your bill entirely, and your system has been running, that is a problem that needs to be investigated - see the error-checking section below.
Net Consumption
Net consumption is Import Units minus Export Units. This is the figure that UPPCL applies your energy rate to. If your home consumed 350 units from the grid and your solar system exported 200 units, your net consumption for the period is 150 units. Energy charges appear only on this net figure. If export exceeded import for the period, net consumption is zero or negative - in that case your energy charges are zero, and the surplus rolls forward as a credit balance.
Energy Charges
At UP's 2026 residential tariff of Rs 7 to 9 per unit (the rate varies by slab and connection type), energy charges are applied only to the net consumption figure. This is the primary way solar reduces your bill. A household that previously paid energy charges on 400 units now pays on 100 or 50 units, or on zero if export exceeds import.
Fixed and Demand Charges
This line item remains on your bill every single month, even when your net consumption is zero or negative. Fixed charges for a residential connection in UP typically run Rs 100 to Rs 300 per month depending on your sanctioned load. These charges cover the cost of maintaining your grid connection - the transformer, lines, and infrastructure that supply your home. They are not an error. A solar system cannot eliminate fixed charges, and if an installer told you your bill would go to zero completely, that was an overstatement. Your minimum monthly bill in any month will be approximately your fixed charge plus applicable surcharges.
Surcharges and Taxes
Several surcharges appear below the energy and fixed charge lines. The Fuel Adjustment Charge (FAC) varies monthly and reflects UPPCL's actual fuel costs; it can be positive or negative in a given month. A regulatory surcharge, electricity duty (levied by the state government), and 5 percent GST applied to the electricity consumption portion also appear. These are all standard and apply to net consumption, not gross consumption. On a month where net consumption is zero, most of these surcharges reduce to zero or near-zero as well, though fixed charges and some levies remain.
Understanding Credits and the Annual Settlement
Monthly Credit Rollover
In any billing period where your solar system exports more units than your home imports, you have a net credit. UPPCL carries this credit forward automatically to the next billing period. It appears on your next bill as a credit balance, reducing your payable amount. You do not receive a cash payment for this monthly credit - it only offsets future consumption charges. This rollover continues month to month through the financial year.
The Annual Settlement in March
At the end of each financial year on March 31, UPPCL settles any remaining accumulated credit balance. If, over the full year, you exported more units than you imported and still have an outstanding credit after all monthly offsets, UPPCL pays out that balance - but at the "pooled cost" rate, not at the retail tariff rate you pay for consumption. In 2026 the pooled cost rate is approximately Rs 3 to 4 per unit, compared to the Rs 7 to 9 per unit retail rate. This means each unit of excess export you carry into the annual settlement is worth roughly 40 to 50 percent of what you would have paid for the same unit from the grid.
This is why right-sizing your solar system matters. A system that offsets your consumption precisely (exporting very little) is financially more efficient than one that consistently exports large volumes. A 5 kW system producing 800 units per month for a home that uses only 300 units per month is spending 500 units each month at a settlement rate of Rs 3 to 4 per unit rather than saving them at Rs 7 to 9 per unit. Your installer should be designing for your consumption, not for maximum panel count.
Spotting Errors on Your Bill
Verifying Export Units
Open your inverter app and find the cumulative export figure for the billing period that just ended. Compare it to the export units UPPCL recorded on your bill. These figures should be within 1 to 2 percent of each other over a full billing cycle. Your inverter measures AC output at the inverter terminals; the UPPCL meter measures export at the meter, so small differences from wiring between the inverter and meter are normal. A difference of 5 percent or more suggests a metering problem and warrants investigation. If export credits are missing from your bill entirely, your net metering meter may have a connection issue - contact both your UPPCL section office and your installer.
Estimated Meter Readings
If your bill shows the words "reading estimated" or a similar notation, it means a meter reader did not physically visit and UPPCL estimated your consumption based on a historical average. Estimated readings for net metering meters frequently produce inaccurate bills because the estimation formula was built for ordinary meters, not bidirectional ones. If you receive an estimated reading bill, note your actual meter reading and raise a correction request at your UPPCL section office. Keep a photo of your meter reading on the last day of each billing period as a precaution.
What a Normal Low Bill Looks Like
Consider a concrete example: a 5 kW solar system in Lucknow serving a home that uses 400 units per month from the grid. In a good summer month, the solar system generates 600 units, of which the home uses 400 units directly and exports 200 units back to the grid. The net metering meter records 0 import units and 200 export units. The month's energy charge is zero (net consumption is zero). The bill shows only fixed charges of approximately Rs 200 plus a small electricity duty and regulatory surcharge - total bill around Rs 250 to Rs 350, compared to a previous bill of around Rs 3,200. The Rs 200 unit credit from the export rolls forward to offset next month's import.
At Sunwize, the most common calls we receive from customers in the first two billing cycles are about this exact confusion - the bill looks wrong because it looks so different. Once you understand what each line represents, the logic is clear and consistent. If after reading this guide your bill still shows something that cannot be explained, bring a copy to your installer and to your UPPCL section office together.
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