Key takeaways, 2026
- SMETS2-only: SMETS1 stopped being installed in 2022 and the entire legacy fleet is now migrated to the DCC.
- Switching no longer breaks them: the single biggest historical complaint is finally resolved.
- Free to install: hour-long visit, 30-40 minute power interruption, no business charge.
- Five tariff features: wholesale-linked rates, plunge pricing, time-of-use, IFTTT integration and price caps, only with a smart meter.
70%+
UK SME uptake
By end of 2025.
~1 hr
Install time
30-40 min power off.
£0
Cost to business
Free under rollout.
5-8%
Typical bill drop
First-year behavioural change.
What changed between 2022 and 2026
Three things. First, SMETS1 was discontinued for new installations in 2022, and the legacy fleet (around 5.5 million units) was migrated to the DCC network in three phases between 2019 and 2022. By 2026 every smart meter on the UK grid is either an SMETS2 unit or a DCC-enrolled SMETS1. They behave identically from the user's perspective.
Second, the "dumb-after-switching" problem is gone. The historical complaint that switching supplier caused an SMETS1 meter to lose its smart functionality was the single biggest reason businesses refused them. Migration to the DCC fixed it, and SMETS2 was never affected to begin with. In 2026 you can switch supplier as often as you like without affecting the meter.
Third, the smart-meter rollout target was missed but the obligation continues. The original government goal of every UK home and small business having a smart meter by 2020 was extended through to 2025, then again to mid-2026. Suppliers must continue to "take all reasonable steps" to install smart meters until the rollout is declared complete, which is now expected in 2027.
Fourth, and most important for 2026 planning, the post-2025 policy framework introduces a contract trigger from 1 January 2027. From that date, taking out or renewing a fixed-term business energy contract requires you to have, or to agree to have, a smart or advanced meter fitted. There is no fine for refusing, but a non-smart meter will increasingly cut you off from the cheaper fixed and time-of-use tariffs. The practical takeaway is to book a free installation in 2026 so you are not negotiating a renewal and a meter swap at the same time.
Smart vs. AMR vs. half-hourly: which one fits
Three meter families send readings automatically. The right one depends on your peak load and whether you want an in-home display.
Smart (SMETS2)
Free, auto-reads, in-home display, supplier-portable. Default choice for shops, offices, restaurants and salons up to around 100 kW peak.
Cost: £0 · IHD: yes · Auto-read: yes
AMR
Auto-reads via SIM, no consumer display. Common in chains because data flows directly into central energy management systems.
Cost: £4-£10/mo · IHD: no · Auto-read: yes
Half-hourly (HH)
Legally required for high-load sites. Records every 30 min and reports directly to your supplier. No IHD by default.
Cost: included in HH tariff · Mandatory: yes
The five tariff features only a smart meter unlocks
The smart meter itself does not save anyone money: the meter is just hardware. What saves money is the tariff features that the half-hourly data unlocks. Five of them are worth knowing about in 2026.
Wholesale-linked / Agile-style tariffs
Your half-hourly unit rate moves with the wholesale market. When the grid is windy and demand is low, prices crash; when demand peaks, they rise. Businesses that can shift discretionary loads (dishwashers, ice machines, EV charging) save 15-30%. Octopus, Eon Next and several smaller suppliers offer this in 2026.
Plunge Pricing
When grid generation exceeds demand (typically windy weekends and bank holidays), wholesale prices go negative. Some agile tariffs pass that through: the supplier pays you to use electricity during the window. Useful for over-cooling walk-ins, heating hot water cylinders, charging batteries.
Time-of-Use (TOU)
Three or four fixed unit-rate bands (peak, shoulder, off-peak, night). Less volatile than full agile, easier for staff to understand and act on. Smart meters make TOU billing possible because non-smart meters cannot prove when electricity was consumed.
IFTTT and smart-home integration
SMETS2 meters expose a real-time data feed that can drive automation rules through IFTTT, Home Assistant, Alexa Routines and similar. Common patterns: "if wholesale below £45/MWh, switch on hot water"; "if peak hour starts, dim non-essential lights"; "if monthly use over X kWh, send alert".
Price Cap protection
On variable / agile tariffs, the supplier guarantees no unit rate above a stated ceiling (typically 35 p/kWh in 2026). Removes the disaster-scenario downside of a bad wholesale week. The cap only works because the smart meter proves when the spike happened.
How to read a SMETS2 smart meter
You almost never need to read a smart meter manually, because it sends readings to your supplier automatically. The only times you do need to read it: when you want to spot-check the supplier's reading against the meter, when you switch supplier and want to record an opening read, or when the in-home display is malfunctioning.
Press the central button on the meter face. The display will cycle through:
- The cumulative meter reading in kWh (this is the number to record);
- The current rate in pence per kWh;
- The current load in watts;
- The serial number of the meter;
- The date and time of the last data send.
Installation, leases and landlords
Booking an installation is straightforward: contact your existing supplier, who arranges the visit through their contracted Metering Equipment Provider (MEP). The visit takes about an hour with a 30 to 40 minute power interruption, scheduled in advance.
If you rent the premises, check the lease before booking. The default position is that the meter is fixed to the building and therefore part of the landlord's asset, but installation rarely affects the building structure. Most commercial leases allow tenants to swap meters with written notice, though a small minority require formal landlord consent. If your lease is silent, send a one-line notice to the landlord stating the date and the work.
When the lease ends, the smart meter stays with the premises. The incoming tenant inherits it and can either keep it or ask for it to be replaced.
When mobile signal is weak
SMETS2 meters communicate over a dedicated mobile network operated by the DCC, not your local mobile network. In 2026 the DCC network covers around 99.5% of UK premises, while the remaining 0.5% sit in rural or below-ground locations where signal is unreliable.
If a signal test during the installation visit fails, the engineer has three options: fit an external antenna mounted higher on the building, install a SMETS2v signal booster at additional cost, or revert to a manual-read meter for the time being. In a worst-case scenario, your premises may not be eligible for a smart meter at all until the DCC network is upgraded in your area.
Security and data privacy
Smart meter data is encrypted to ISO 27001 standard. The DCC carries the data but cannot read it: only the energy supplier you have a current contract with can decrypt it, and the supplier is subject to regular Ofgem security audits. The meter itself stores nothing about you as a person, only kWh readings and timestamps.
You can control how often readings are sent. The legal minimum is monthly, the maximum is half-hourly, and most businesses default to daily. Contact your supplier to change the frequency.
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Frequently asked questions
Not in 2026 itself, but the rules tighten in 2027. Suppliers must offer a smart meter to every microbusiness and SME, and the voluntary uptake rate passed 70% during 2025. The key change: under the government's post-2025 framework, from 1 January 2027 you will need to have, or agree to have, a smart or advanced meter installed to enter into or renew a fixed-term business energy contract. Declining one in 2026 is still penalty-free, but it will limit your tariff choice from 2027.
Yes. The "dumb-after-switch" problem that affected SMETS1 meters between 2018 and 2021 was resolved when all SMETS1 units were migrated to the DCC network by mid-2022. Every smart meter installed since then is SMETS2, which is supplier-agnostic by design. In 2026, switching supplier no longer affects smart functionality at any point.
£0. Installation is free under the government rollout, paid for by a small per-customer charge already built into every supplier's tariff. The engineer visit takes about an hour with a 30 to 40 minute power interruption. Any supplier trying to charge for a standard smart meter installation in 2026 is mis-billing: the only exception is multi-site commercial rollouts that require unusual cabling work.
Yes. Smart meters use a dedicated mobile network (4G or the long-range Long-Range Wide-Area variant) to communicate with the supplier, not your shop or office wifi. The network is operated by the Data Communications Company (DCC) and is independent of any commercial telecom provider. As long as there is mobile signal at your meter location, it works.
Both send readings to your supplier automatically via a SIM card, removing the need for manual reads. The differences: smart meters have an in-home display showing real-time pounds and pence, AMR meters do not. Smart meters are universally SMETS2 in 2026, AMR meters come in many variants. Smart meters are free to install, while AMR rental is typically £4-£10 per month per meter. For most SMEs, smart is the better choice; AMR remains common in multi-site retail chains and education.
Yes on both counts. Smart meters transmit at the same RF power level as a baby monitor and well within OFCOM safety limits. Data is encrypted to ISO 27001 standards and only your contracted energy supplier can access it. The DCC carries the data but cannot read it. You can also limit how often readings are sent (monthly is the legal minimum) if you have specific privacy concerns.