• By Best Solar Company PK
  • 04 Sep, 2026
  • Solar Guides
  • 8 min read @@METATITLE@@ Beat Peak-Hour Loadshedding: Solar Battery Sizing 2026 @@METADESC@@ Govt's 2.25-hour evening peak cuts overlap the Rs 46.85 peak tariff. Size a solar battery to run through peak-hour loadshedding in Pakistan—here's how.

Pakistan is now doing something that sounds impossible: rationing electricity while sitting on a capacity surplus. In April 2026 the Power Division rolled out up to **2.25 hours of daily "peak relief" loadshedding** in the 5 PM–1 AM window — not because the grid lacks megawatts, but because running expensive imported-fuel plants during the evening spike would push tariffs even higher. For homeowners the maths is brutal: you lose power *and* pay top rates for whatever you do use. The cleanest way out is to size a **solar battery for peak-hour loadshedding** so your home simply ignores the schedule.

The good news is that these cuts are predictable. A scheduled outage you can plan for — unlike the old random blackouts. That makes a modestly sized solar-plus-storage system one of the highest-return upgrades a Pakistani household can make in 2026.

Why the Evening Peak Is a Double Hit

The scheduled cut lands exactly where electricity is most expensive. Under NEPRA's Time-of-Use (ToU) tariff, homes with a sanctioned load of 5 kW or more pay:

  • **Rs 46.85 per unit** during peak hours
  • **Rs 34.53 per unit** off-peak
  • **Rs 675 per kW/month** in fixed charges

For most ex-WAPDA DISCOs (LESCO, MEPCO, IESCO, GEPCO, FESCO and others) peak runs **7 PM–11 PM in summer**, shifting to **5 PM–9 PM in winter**. K-Electric's peak sits at 6:30 PM–10:30 PM. Notice the overlap: the "peak relief" outage window and the peak-tariff window are basically the same evening hours.

Ride the evening on stored sunshine and you dodge two problems at once — the blackout and the Rs 46.85 unit.

So a battery here isn't just backup. Every unit you self-consume between 7 and 11 PM is a unit you *don't* buy at the peak rate — the saving is baked in whether or not the loadshedding actually hits your feeder that night.

The Net-Billing Twist: Why Batteries Now Beat Export

Two years ago the advice was "oversize your panels and sell surplus to the grid." That logic is dead. Under the **NEPRA (Prosumer) Regulations, 2026**, new rooftop applicants moved from net metering to **net billing**: you still buy grid power at the full tariff, but the DISCO now buys your exported units at the National Average Energy Purchase Price — roughly **Rs 8–12 per unit**, down from the old Rs 25.9. Contracts also shrank from seven years to five.

Anyone who energised their system before **9 February 2026** keeps the old net-metering deal. Everyone else should stop thinking "export" and start thinking "store and self-consume." When a unit is worth Rs 47 to *use* but only Rs 10 to *sell*, keeping it in a battery for the evening peak is the obvious move. For a full breakdown, see our net-metering to net-billing guide.

How to Size Solar for the Peak-Hour Window

Work backwards from the hours you must cover. A simple four-step method:

1. **List your evening-peak essentials.** Fans, LED lights, TV, router, fridge, and perhaps one inverter AC. Add up the running watts. 2. **Multiply by the hours to cover.** Plan for ~4 hours (the full peak window), even though the cut is 2.25 hours — this gives headroom if outages extend past 11 PM. 3. **Add losses.** Divide usable energy by ~0.9 for LiFePO4 depth-of-discharge and inverter efficiency. 4. **Size panels to refill it by day.** You need enough solar to run daytime loads *and* recharge the battery before evening — usually 4–6 kW of panels for a mid-sized home.

A typical middle-class home draws about **1 kW of essentials plus ~1 kW for one inverter AC** in the evening. Over four hours that's roughly 8 kWh — comfortably handled by a 10 kWh battery.

Battery Sizing: Match kWh to Your Real Peak Load

Use this table as a starting point, then adjust for your own appliance list. Prices are indicative 2026 street rates for lithium (LiFePO4) storage, which now runs about **Rs 45,000–65,000 per kWh**.

| Household profile | Evening peak load | Usable energy needed | Nominal battery (LiFePO4) | Indicative 2026 price | |---|---|---|---|---| | Small home — fans, lights, TV, fridge | ~1.0 kW | ~4 kWh | 5 kWh | Rs 225,000–260,000 | | Mid home + 1 inverter AC | ~2.0 kW | ~8 kWh | 10 kWh | Rs 450,000–560,000 | | Large home + 2 ACs | ~3.5 kW | ~14 kWh | 15–16 kWh | Rs 650,000–780,000 |

Pair the battery with a **hybrid inverter** sized to your peak surge, not just steady load. A 6 kW single-phase hybrid runs about **Rs 228,000–250,000**, while a 10 kW unit is around **Rs 375,000–424,000**. Undersizing the inverter is the most common mistake — an AC compressor's start-up surge can trip a unit that looked fine on paper. Our hybrid inverter sizing guide walks through the surge maths.

What It Costs — and How Fast It Pays Back

A practical mid-home package — around **6 kW of panels, a 6–8 kW hybrid inverter and a 10 kWh LiFePO4 battery** — lands roughly in the **Rs 1.4–1.8 million** range installed in 2026, depending on brand and structure.

Here's why it works. Shift just 8 kWh a day off the Rs 46.85 peak onto stored solar (effective cost well under Rs 12/unit) and you save around **Rs 280 a day, or ~Rs 8,500 a month**, on peak avoidance *alone*. Add daytime solar offsetting Rs 34–47 units and total monthly savings for a mid home commonly reach **Rs 25,000–40,000** — a payback of roughly 4–5 years on a system that lasts 8–10+ years for the battery and 25 for the panels.

For deeper cost tables, compare current models in our best lithium solar batteries roundup. And always confirm the latest tariff and prosumer rules directly with <a href="https://nepra.org.pk" target="_blank" rel="noopener">NEPRA</a>, the official regulator, before you sign — rates and buyback prices are still moving in 2026.

Frequently Asked Questions

**Does the peak-hour loadshedding apply to Karachi?** No. K-Electric and HESCO consumers were exempted from the 2.25-hour "peak relief" schedule announced by the Power Division. But Karachi households still pay a peak ToU tariff (6:30 PM–10:30 PM), so a solar battery still saves money there even without scheduled cuts.

**How big a battery do I need to survive the whole peak window?** For most homes, a 5 kWh battery covers lights, fans, fridge and a TV; add an inverter AC and you want 10 kWh. Size for about four hours of your real evening load and keep 10–15% as reserve for LiFePO4 longevity.

**Is a battery still worth it now that net billing pays so little?** Yes — arguably more than before. Because export now earns only Rs 8–12 per unit against a Rs 46.85 peak buy rate, storing your solar and using it in the evening delivers far more value than selling it to the grid.

**Can I add a battery to an existing on-grid solar system?** Usually yes, if your inverter is hybrid-capable. If you have a string/on-grid-only inverter, you'll need to swap to a hybrid model or add an AC-coupled battery inverter to bridge the peak-hour cuts.

The Bottom Line

Scheduled peak-hour loadshedding turns a nuisance into a plan you can engineer around. By sizing a **solar battery for the evening peak**, Pakistani homeowners escape both the blackout and the Rs 46.85 tariff in one move — and under 2026 net-billing rules, self-consumption beats export every time. Get a proper load audit, size the inverter for surge, and match your battery to the four-hour evening window.

Ready to size your system correctly? Contact Best Solar Company PK for a free peak-hour load assessment and a tailored solar-plus-storage quote for your home or business.

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.