Smart Meter Guide
How smart meters work and whether to get one.
Smart Meter Problems
Common smart meter faults and how to fix them.
SMETS1 vs SMETS2
The difference between smart meter generations.
Smart Meter Switching Advice
What happens to your smart meter when you switch supplier.
Usage Tracking Tools
Estimate savings from tracking your energy use.
What do you need help with?
Smart meters and billing problems: the essentials
Start by naming the problem
Billing problems fall into a few recognisable groups: the meter is not communicating so bills are estimated, the meter readings themselves look wrong, the tariff or rates applied are wrong, or the direct debit is out of step with actual consumption. The remedy differs in each case, so identifying which one applies saves a lot of time on the phone.
The in-home display is not the meter
The display unit shows data sent by the meter. If the display is blank or frozen, the meter is usually still recording correctly — that is a communication or display fault, not a metering error. A genuine metering fault shows up as readings that do not match manual meter readings taken at the meter itself.
Evidence to keep
Take a dated photograph of the meter reading, keep the bills either side of the disputed period, note the dates and names from any calls, and keep written responses. If a complaint has to be escalated, that record is what the case rests on.
Complaint route and escalation
Raise the issue with your supplier first and ask for it to be logged as a formal complaint. If it is not resolved, or eight weeks pass, the Energy Ombudsman can consider the case free of charge and its decision binds the supplier. Citizens Advice runs the consumer helpline for energy and can help before that point. PowerGuardian publishes guidance only — we are not a regulated legal or financial adviser and we cannot act on your behalf.
If you are struggling or at risk of disconnection
Contact your supplier immediately and ask about affordable payment plans and the Priority Services Register. Suppliers must not disconnect a household that is engaging about payment, and additional protections apply to vulnerable customers. Citizens Advice can advise independently and free of charge.
Guides in this topic
- Smart meter guide — How smart meters work and what they change.
- Smart meter problems — Diagnosing connection, display and reading faults.
- SMETS1 vs SMETS2 — Meter generations and what they mean for switching.
- Switching with a smart meter — What happens to the meter when you change supplier.
- Challenging an estimated bill — Evidence, back-billing and escalation.
- Support for vulnerable households — Priority Services Register and payment help.
Calculators for this topic
- Smart meter savings estimator — Indicative saving from accurate readings and tariffs.
- Energy debt repayment calculator — Model a realistic repayment arrangement.
Official sources
- Energy Ombudsman — Free, binding escalation once a complaint is deadlocked or eight weeks old.
- Citizens Advice consumer helpline — Independent help with supplier and billing disputes.
- Ofgem — complaints and disputes — The regulator's description of the complaints process.
Your next step
Compare twelve months of payments with your estimated annual cost before you complain.
Check whether your direct debit is reasonableCommon questions on this topic
Last reviewed 13 August 2026
Written and maintained by the PowerGuardian Consumer Desk. The consumer desk turns market data into practical decisions for UK bill payers — when to fix, when to switch, and how to spot tariffs that look cheap but aren't. Guidance is independent: we take no commission from energy suppliers for it.
PowerGuardian publishes independent guidance for UK households. We do not provide regulated legal or financial advice. Read our editorial policy.
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