Swarm Grids: Could Peer-to-Peer Solar Save Twin-Cities Homeowners from Low Net-Billing Rates?

• By Best Solar Company PK
• 16 Sep, 2026
• Solar Policy
• 8 min read

If you installed rooftop solar in Islamabad or Rawalpindi this year, you already know the sting. Since the **Prosumer Regulations 2026** took effect in February 2026, new solar homes no longer swap units one-for-one with the grid. Instead, you buy imported power at your full retail tariff — often **Rs 45–50 per unit** — while your exported surplus is bought back at a far lower reference rate. That asymmetry is exactly why a new September 2026 study on **swarm grids** and **peer-to-peer solar sharing in Pakistan** has caught the attention of twin-cities homeowners.

The idea is simple but radical: instead of dumping your extra midday solar into the national grid for pennies, what if you could sell it to your neighbour next door — at a price you both agree on?

What the September 2026 swarm grids study actually says

The research, released this month by the **Policy Research Institute for Equitable Development (PRIED)**, argues that Pakistan can turn its runaway rooftop boom into decentralised, community-run micro-grids. The regulator's own data shows rooftop capacity has exploded roughly 37-fold in six years — from about 190 MW in FY2020 to nearly **7,000 MW by mid-2026**.

PRIED defines a swarm grid as a *digitally coordinated, decentralised local network* where households and small businesses consume their own solar, store surplus in batteries, sell extra units to nearby prosumers, and buy from neighbours — using the national grid mainly as backup.

The researchers tested the concept in two very different settings: **Islamabad**, as a dense urban case on an established grid, and **Tharparkar** in Sindh, as a dispersed rural case. Using household surveys, solar-resource data and an hourly dispatch model, they concluded the model is technically feasible today — but that **regulation, not technology, is the missing link.**

Why twin-cities homeowners are the natural test bed

Islamabad and Rawalpindi are Pakistan's classic "twin cities," and they tick every box a swarm grid needs:

• **High rooftop density** — sectors full of houses with panels already installed.
• **Diverse demand** — homes peak in the evening, offices and shops peak midday, so surplus and shortfall naturally offset each other.
• **A strong existing grid** — IESCO's network means a swarm can lean on the grid as backup rather than needing costly islanding.

Picture an F-11 or Bahria Town street where ten houses have 10 kW systems. At 1 PM in June, most are exporting heavily and being paid the low buyback rate. Two doors down, a home-based salon is running ACs and buying at full tariff. A swarm grid lets that solar move sideways — neighbour to neighbour — instead of making the round trip to the grid and back at a loss.

The net-billing math that makes sharing attractive

Here's the gap the study is really responding to. Compare where your surplus unit can go today:

| Where your surplus solar unit goes | Approx. value you get (PKR/unit) | |---|---| | Exported under old net metering (pre-2026 consumers) | ~25.32 (locked for existing users) | | Exported under new net billing (post-Feb 2026) | ~8–11 | | What you pay to import from the grid | ~45–50 | | Hypothetical peer-to-peer sale to a neighbour | Negotiable — anywhere between the two |

Under net billing, a new prosumer might export at roughly **Rs 8–11** and re-import in the evening at close to **Rs 50** — losing up to **Rs 40 on every unit** that takes the grid round trip. If that same unit were sold peer-to-peer at, say, **Rs 25–30**, both neighbours win: the seller earns two to three times the buyback rate, and the buyer pays well below retail. That spread is the entire economic engine behind swarm grids.

The catch: peer-to-peer trading is not yet legal

This is where the study is blunt. Under current rules, **selling electricity to a third party within a distribution company's territory is restricted.** You cannot simply run a wire to your neighbour and invoice them for units. New regulations would be needed to answer three questions:

1. **Who is allowed to sell** electricity to whom? 2. **At what price** — free-market, capped, or floor-protected? 3. **Through what settlement mechanism** — smart meters, a billing platform, or blockchain-style ledgers?

PRIED's recommendations to policymakers include:

• Introduce clear **rules for peer-to-peer electricity trading.**
• **Standardise solar equipment** connected to distribution networks so swarms are safe and interoperable.
• Open the retail market under the **Competitive Trading Bilateral Contract Market (CTBCM)** — the framework meant to let multiple sellers and buyers trade.
• Launch **urban and rural pilot projects** to prove the model before national rollout.

What twin-cities homeowners should do right now

You cannot join a swarm grid today — but you can position yourself so you're ready and, meanwhile, blunt the net-billing hit. From our experience sizing systems across Islamabad and Rawalpindi, the practical moves are:

• **Right-size, don't oversize.** Under net billing, a giant array that dumps cheap surplus is less valuable. Match capacity to your daytime load. See our guide on sizing a home solar system for the new net-billing era.
• **Add storage.** A battery lets you *self-consume* evening load instead of re-importing at Rs 50. This is the single biggest lever now. Read how batteries change solar payback in 2026.
• **Shift heavy loads to midday** — run the washing machine, water pump and any EV charging while the sun is up.
• **Keep your paperwork clean.** If a P2P pilot opens in your sector, standardised, properly documented equipment will qualify first.

For the bigger regulatory picture, our explainer on Pakistan's shift from net metering to net billing breaks down what changed and who is grandfathered in.

The honest outlook

Swarm grids are not a 2026 solution — they are a 2027-and-beyond possibility that depends entirely on NEPRA and the federal government writing new trading rules. But the direction of travel is clear. With DISCOs warning of a "grid defection" spiral as more households go solar, and with net-billing rates making grid export unattractive, keeping surplus energy *inside the neighbourhood* is one of the few models that helps homeowners, protects the grid, and cuts distribution losses at the same time.

For twin-cities homeowners staring at a low export rate, the takeaway is this: your rooftop's surplus is worth far more to the house next door than to the grid. The technology to share it exists. Now it's a policy question.

Frequently Asked Questions

**What is a swarm grid in simple terms?** A swarm grid is a small, self-managing neighbourhood network that links several solar homes so they can share power directly — consuming their own solar, storing it in batteries, and selling surplus to nearby homes — while using the national grid only as backup. There is no central controller; the "swarm" balances itself.

**Is peer-to-peer solar trading legal in Pakistan in 2026?** Not yet. Current regulations restrict selling electricity to third parties within a distribution company's territory. The September 2026 PRIED study specifically recommends new rules and CTBCM market reforms to make peer-to-peer trading and swarm grids possible.

**How is net billing different from net metering?** Under the old net metering, exported units were swapped one-for-one against imported units. Under net billing (effective February 2026 for new consumers), you are paid a low reference/buyback rate — roughly Rs 8–11 per unit — for exports, while still paying full retail (around Rs 45–50) for imports. Consumers connected before the change keep their older rate of about Rs 25.32.

**Would a swarm grid let me disconnect from the grid entirely?** No, and that isn't the goal. In the study's model the national grid stays connected as backup for cloudy days and demand spikes. Swarm grids reduce your reliance on grid imports and improve the value of your surplus, but full off-grid living still requires large, costly battery banks.

**How can Islamabad or Rawalpindi homeowners prepare now?** Right-size your system to your daytime load, add battery storage to self-consume evening power, shift heavy appliance use to midday, and keep your equipment standardised and documented so you qualify quickly if a local peer-to-peer pilot launches.

Sources: Business Recorder, ProPakistani, Profit by Pakistan Today.

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.