Rs28/Unit Bills Are Here: How Rooftop Solar Beats the September 2026 Shock

• By Best Solar Company PK
• 20 Sep, 2026
• Energy Savings
• 8 min read

If your September 2026 electricity bill made you wince, you are not imagining it. Power bills this month are the highest in two years across almost every category, with the average domestic tariff climbing toward **Rs28.23 per unit**. The single biggest culprit is the monthly Fuel Charges Adjustment (FCA), which has jumped to **Rs2.06 per unit** — the largest positive fuel-cost adjustment in 24 months.

For homeowners and businesses already stretched thin, this is the moment rooftop solar stops being a "nice to have" and becomes a hard financial decision. Below, we break down exactly what changed, why, and how much a solar system realistically shaves off a bill that now averages nearly Rs28 a unit.

Why September 2026 bills spiked

NEPRA approved a positive FCA of **Rs2.0581 per unit** for electricity consumed in July 2026, recovered from consumers of the ex-WAPDA distribution companies (DISCOs) and K-Electric through **September bills**. That is a dramatic jump — the same adjustment was just **10 paisa** in the corresponding period last year and **75 paisa** last month.

The reason is fuel. The actual fuel-cost component for July landed at **Rs9.1511 per kWh** against a reference of Rs7.0929, and the gap — driven mainly by expensive LNG bought on the spot market — produced the Rs2.06 hit. Re-gasified LNG (RLNG) generation touched roughly **Rs47 per unit**, the highest in Pakistan's history.

Stack the FCA on top of quarterly tariff adjustments, capacity charges, GST, and the TV/PTV and financing surcharges, and the "sticker price" of a grid unit for a mid-tier household routinely lands in the **Rs40–50 per unit** range once all line items are added. For a detailed month-by-month view, see our electricity bill breakdown guide.

How much a rooftop system actually saves now

The value of solar is simple: every unit you produce and **use yourself** is a unit you don't buy at the inflated grid rate. Here is a realistic estimate for common home systems in Pakistan, assuming healthy self-consumption during daylight hours.

| System size | Typical monthly output | Units self-consumed | Monthly bill saving* | |---|---|---|---| | 5 kW on-grid | ~600–700 units | ~500 units | Rs20,000–25,000 | | 10 kW on-grid | ~1,200–1,400 units | ~1,000 units | Rs40,000–50,000 | | 10 kW hybrid (battery) | ~1,200–1,400 units | ~1,150 units | Rs46,000–55,000 |

*Based on offsetting grid units at an all-in effective rate of roughly Rs40–50/unit for mid-to-upper slab consumers. Actual savings vary by DISCO, slab, and sunshine.

The key change in 2026 is **where** the savings come from. Under the old net-metering regime, exporting surplus at ~Rs27/unit made oversizing attractive. That math has shifted.

Net metering is now "net billing" — and it matters

In 2026 NEPRA replaced net metering with a **net billing** model under the new Prosumer Regulations. The headline change: surplus units you export to the grid are now bought back at the national average energy rate — roughly **Rs11 per unit** — instead of the earlier ~Rs27.

You still **buy** grid power at the full Rs40–50/unit tariff, but you **sell** excess at only ~Rs11. That widens the gap between consuming your own solar and exporting it, which reshapes the smart strategy:

• **Self-consumption is king.** Run heavy loads — ACs, pumps, washing machines, ironing — during daylight when panels are producing.
• **Right-size, don't oversize.** A system tuned to your daytime load beats a giant array dumping cheap units onto the grid.
• **Batteries make more sense than before.** Storing midday surplus to use at night (instead of exporting at Rs11 and re-buying at Rs45) can pay off, especially for evening-heavy households.

Importantly, **existing net-metering consumers are protected**. The new rules do not automatically apply to those already connected; DISCOs may shift consumers only after their current agreement expires, and applications submitted before 8 February 2026 are still processed under the old policy. If you already have net metering, your favourable terms stand for now.

What a system costs in 2026

Prices have actually eased as panel costs fell. Current market ranges:

• **5 kW on-grid:** from around **PKR 496,000**, including net metering
• **10 kW on-grid:** roughly **PKR 950,000–1,200,000** installed with net metering
• **10 kW hybrid (lithium battery):** about **PKR 1.4–1.7 million**
• **Per-watt basis:** roughly **PKR 34–45 per watt** all-in

Take a 10 kW on-grid system at ~PKR 1.1 million saving Rs45,000/month. That is a simple payback of roughly **24–28 months** — under two-and-a-half years — after which the electricity is effectively free for the 20–25 year panel life. As FCA and fuel costs climb, that payback only gets shorter. Explore sizing options in our home solar sizing guide.

An original tip: chase your slab, not just your bill

Here is something most installers won't tell you. Pakistan's tariff is **slab-based**, and slabs are steeply progressive — crossing from the 300-unit into the 400-unit band can push your *entire* consumption onto a costlier rate. The highest-value units solar can eliminate are your **top, most expensive slab units**.

Before sizing a system, pull your last 12 bills and identify the months you breach a slab. A modestly sized array that keeps you **under a slab threshold** can save more per rupee invested than a bigger system chasing export income at Rs11. In a net-billing world, protecting your slab position is the new optimisation game.

Frequently Asked Questions

**How much is the FCA on my September 2026 bill?** The Fuel Charges Adjustment for July consumption, billed in September 2026, is **Rs2.0581 per unit** — the biggest positive FCA in 24 months, up from just 10 paisa a year earlier. It is charged on your net units and pushes the effective rate for many households well above Rs40/unit once all surcharges are counted.

**Does solar still make sense after net metering was scrapped?** Yes — arguably more than before. The value now comes from **avoiding** grid purchases at Rs40–50/unit rather than exporting. As long as you consume most of your own generation during the day, a rooftop system delivers strong savings and a payback of roughly two to three years.

**What is the new solar buyback rate in Pakistan?** Under NEPRA's 2026 net-billing rules, surplus units exported to the grid are purchased at the national average energy rate, currently about **Rs11 per unit**, down from the previous ~Rs27. You still buy grid electricity at the full retail tariff.

**Will my existing net metering be cancelled?** No, not automatically. Existing net-metering agreements are honoured until they expire, and applications filed before 8 February 2026 are still handled under the old policy. New connections fall under net billing.

The bottom line

September 2026 delivered a genuine bill shock: a two-year-high average near **Rs28.23/unit**, driven by a record **Rs2.06/unit** FCA and the priciest LNG generation in the country's history. Grid electricity is only getting more expensive and more volatile.

Rooftop solar flips that equation — turning your roof into a hedge against fuel-cost swings while your neighbours absorb every FCA increase. Even under the tighter net-billing rules, a right-sized system focused on self-consumption can cut Rs20,000–50,000 off a monthly bill and pay for itself in around two years.

**Ready to see your exact savings?** Get a free rooftop assessment from Best Solar Company PK and we'll model your bill, slab, and payback before you spend a rupee.

*Sources: Business Recorder — September power bills, Energy Update — Rs2.0581 FCA, The Express Tribune — NEPRA net billing.*

Best Solar Company PK designs and installs reliable solar systems in Rawalpindi, Islamabad, Lahore, Multan, Taunsa Sharif and Karachi. Contact us for a free survey and the best advice for your home or business.