Peak-Hour Load Shifting: Beat Pakistan's Rs12/Unit 7–11pm Spread

• By Best Solar Company PK
• 25 Oct, 2026
• Energy Savings
• 8 min read @@METATITLE@@ Peak-Hour Load Shifting to Beat Pakistan's Rs12/Unit Gap @@METADESC@@ Pakistan's peak-hour spread hit ~Rs12/unit (7–11pm). Learn to shift AC, geyser & EV load off-peak—and why solar-plus-battery captures the gap in 2026.

If your home or business runs a 5 kW-or-larger connection, you are almost certainly on a time-of-use (ToU) meter — and the gap between peak and off-peak rates has quietly become one of the biggest levers on your electricity bill. In 2026, **peak-hour load shifting** is no longer a niche trick; it is basic household economics. Peak units now cost around **Rs 46.85** versus **Rs 34.53** off-peak, a spread of roughly **Rs 12.32 per unit**. Every kilowatt-hour you drag out of the evening peak is money back in your pocket.

This guide explains exactly when the peak window falls, which appliances to move, and why pairing a battery with your solar array is becoming the smartest way to capture the spread — especially now that net billing has slashed what the grid pays you for exported power.

What the 7–11pm peak actually costs you

The peak block is always four hours long, but it slides through the year to track sunset and the evening demand surge:

• **June–August:** 7:00pm – 11:00pm
• **March–May and September–November:** 6:00pm – 10:00pm
• **December–February:** 5:00pm – 9:00pm

Everything outside that four-hour block is off-peak — including the whole daytime. Only homes and businesses with a sanctioned load of 5 kW or more are issued a ToU meter; smaller connections pay flat slab rates where timing does not matter.

Here is how the spread translates into real rupees for common high-draw loads.

| Appliance | Typical peak-hour use | Monthly peak units | Potential saving if shifted | |---|---|---|---| | Electric geyser | 1.5–2 hrs evening | ~120 units | ~Rs 1,500 | | Inverter AC (per unit) | 3–4 hrs evening | ~150 units | ~Rs 1,800 | | EV charger | Nightly top-up | ~200+ units | Rs 2,500–4,000 | | Washing machine / dishwasher | Few evening cycles | ~30 units | ~Rs 400 |

A typical ToU household that moves its heavy loads can save roughly **Rs 4,000–5,000 a month** — Rs 50,000+ a year — without buying a single panel.

How to shift AC, geyser and EV load off-peak

Start with the appliances that are both heavy and flexible. You do not need to suffer through a hot evening; you need to pre-cool and pre-heat intelligently.

• **Geyser:** Switch it off during the peak block entirely. Heat water at **5:00–7:00am** or late at night; a well-insulated tank holds heat for hours. Add a simple timer switch (Rs 1,500–3,000) so you never forget.
• **Air conditioning:** Pre-cool rooms in the hour *before* peak starts, then raise the thermostat to 26–27°C during peak. Inverter ACs sip power holding a temperature rather than cooling from scratch. Close curtains and doors to trap the cool.
• **EV charging:** Never charge in the evening. Schedule your charger for **2:00–6:00am** using the car's app or the charger's built-in timer — this single change often saves Rs 3,000+ a month.
• **Washing, dishwashing, RO and tube-well pumps:** Run these off-peak (after 11pm or midday) where water storage allows.

For hands-off control, **WiFi smart breakers** or smart plugs can automate the whole routine, cutting geyser and AC circuits at peak and restoring them after. They pay for themselves within a few months on a 5 kW-plus home.

Why solar-plus-battery captures the gap

Load shifting alone has a ceiling: some evening consumption is unavoidable. This is where a battery changes the maths. You store cheap daytime solar — or cheap off-peak grid power — and discharge it during the Rs 46.85 peak window. In effect, the battery arbitrages the Rs 12-plus spread every single evening.

Why batteries, and why now? Because the old economics of simply exporting surplus to the grid have collapsed. Under the **NEPRA (Prosumer) Regulations, 2026**, Pakistan moved from net metering to **net billing**. New solar consumers are now paid a buyback rate of just **Rs 8.13 per unit** for exported electricity — down a dramatic Rs 17.19 from the earlier rate — while they still *import* at the full slab or peak tariff. (Consumers with a signed agreement before 9 February 2026 keep their old Rs 25.32 rate until it expires.) The contract term for new prosumers has also dropped from seven years to five. For the full breakdown, see our guide to the new NEPRA net billing rules.

The lesson is blunt: a unit you *self-consume* during peak is worth Rs 46.85 to you, while a unit you *export* earns barely Rs 8. Storing your own generation and spending it in the evening is now worth nearly six times more than selling it. That is the single biggest reason solar-plus-battery is overtaking export-only systems in 2026.

What it costs — and the payback

Lithium (LiFePO4) battery prices have fallen to roughly **Rs 45,000–65,000 per kWh**, averaging about **Rs 52,000/kWh**. In round numbers:

• **5 kWh battery bank:** ~Rs 205,000–262,000
• **10 kWh battery bank:** ~Rs 340,000–526,000
• **10 kW hybrid system with battery:** ~PKR 1.25M–1.85M installed, depending on battery size and brand.

A 5–10 kWh battery comfortably covers an evening of AC, lights, fans and a geyser cycle for most homes. If it offsets 10–12 peak units a night at a Rs 12 spread, that is roughly Rs 120–145 saved daily, or Rs 3,600–4,400 a month — before counting the solar generation itself. With tariff-reform pressure pushing peak rates higher, that payback window keeps shrinking. If you are sizing a system, our solar battery buying guide walks through capacity choices.

One practical tip from the field: set your hybrid inverter to **time-of-use (ToU) discharge mode**. This tells the battery to hold charge through the day and release it only during the peak block — squeezing maximum value from every stored unit instead of draining it at random.

Frequently Asked Questions

**What are the current peak hours in Pakistan?** Peak hours run for a four-hour evening block that shifts seasonally: 7–11pm in June–August, 6–10pm in March–May and September–November, and 5–9pm in December–February. Everything else, including daytime, is off-peak.

**How much more does electricity cost during peak hours?** On a residential ToU meter in 2026, peak units cost about Rs 46.85 versus Rs 34.53 off-peak — a difference of roughly Rs 12.32 per unit. Only connections with 5 kW+ sanctioned load are billed this way.

**Is solar still worth it after net billing in 2026?** Yes — but the value has shifted from exporting to self-consumption. Because new buyback is only Rs 8.13/unit while you import at full tariff, storing solar in a battery and using it during peak (worth Rs 46.85) delivers far better returns than selling to the grid.

**Can I shift load without buying a battery?** Absolutely. Using timers and smart breakers to move your geyser, EV and laundry off-peak can save Rs 4,000–5,000 a month at zero generation cost. A battery adds further savings by covering the evening load you cannot move.

The bottom line

Pakistan's Rs 12-plus peak/off-peak spread rewards households that think about *when*, not just *how much*, they consume. Begin with free wins — timers, pre-cooling, off-peak EV charging — then let a right-sized solar-plus-battery system capture the evening gap that load shifting alone cannot. As net billing erodes export value and peak tariffs climb, self-consumption is the strategy that holds up.

**Ready to size a hybrid system for your peak-hour load?** Contact Best Solar Company PK for a free load-profile assessment and a battery recommendation built around your ToU bill.

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.