Many solar advertisements promise a "zero bill". Under Pakistan's old net metering rules, some homes did reach very low or near-zero bills. Under the net billing framework introduced for new connections in 2026, a true zero bill is much harder. Here's why, and what is realistic.
Why zero bills were possible under net metering
With net metering, each exported unit offset one imported unit. A large enough system could export as many units as the home imported at night, bringing net units — and the bill — close to zero (apart from some fixed items and taxes).
Why it is harder under net billing
Under net billing:
- Imports are charged at the full tariff (plus adjustments and taxes).
- Exports are bought at a much lower rate — reported at around Rs 11 per unit in the 2026 regulations.
So to cancel the cost of 1 imported unit at around Rs 50, you would need to export several units. For most homes, that would require an oversized system, which may also be limited by your sanctioned load.
Charges that remain anyway
Even with very low net consumption, a bill may include:
- Fixed charges for some categories
- Taxes on imported electricity
- Adjustments applied per imported unit
- Arrears or other items
What is realistic
A well-designed solar system can still reduce bills dramatically, especially if you:
- Use most solar power directly during the day
- Avoid heavy loads at night
- Add a battery to cover evening use
Some homes with large batteries and careful usage can import very little from the grid — but this is a result of self-sufficiency, not of exporting.
Off-grid option
A fully off-grid system with enough batteries can mean no electricity bill at all, but it needs a large battery bank, careful sizing for cloudy days and higher upfront cost. Most urban homes find a hybrid grid-connected system more practical.
Bottom line
Be cautious of "zero bill" promises. Ask installers to show expected imports, exports and self-consumption for your home under current net billing rates, and calculate savings yourself using our solar payback guide.