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What to gather before comparing tariffs
Use a recent bill or your supplier account to find your current tariff, annual consumption, meter type and payment method. Ofgem says a comparison may ask for your postcode, current supplier and tariff, unit costs and annual energy use. Enter gas and electricity consumption separately where possible; a monthly Direct Debit is a payment amount, not a reliable measure of your annual use.
- Annual gas and electricity use in kWh.
- Your postcode, because rates can vary by region.
- Unit rate and daily standing charge for each fuel.
- Payment method and meter setup, including prepayment, smart-meter or multi-rate arrangements.
- Whether you want a fixed or variable tariff, and the current contract end date and exit fee.
Ofgem’s advice is to compare tariffs first: “You should compare energy tariffs to find the one that’s right for you. The best option may be with your current supplier.” See Ofgem’s switching guidance.
How to compare the full annual cost
Compare the unit rate and standing charge for each fuel using your own expected consumption. A lower unit rate can be offset by a higher daily charge, particularly in a low-use home. Compare dual-fuel tariffs with separate gas and electricity suppliers too: bundling can simplify administration, but it is not necessarily cheaper.
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- SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
- INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
- 24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
- LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
- REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
A basic estimate for each fuel is:
Annual cost = (annual kWh × unit rate) + (365 × daily standing charge)
Add the gas and electricity estimates, then account for tariff-specific terms or discounts. This is a comparison estimate, not a guaranteed bill; actual costs depend on how much energy you use and the tariff conditions. For a multi-rate tariff, apply each rate to the kWh you expect to use in that period rather than treating it as one price.
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- ⚡ EASY INSTALLATION: Installs in circuit panel of most homes with clamp-on sensors. Supports single-phase up to 240VAC line-neutral; single, split-phase 120/240VAC; and three-phase up to 415Y/240VAC (no Delta). The branch lines can automatically match different phases and have no restrictions in terms of quantity and voltage.Panels with access only to busbars will need flexible sensors available from SEM-Meter.
- ⚡ ENERGY MONITORING ANYTIME, ANYWHERE: Monitor your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. Light commercial 3 phase option available as a separate bundle. Protected by a 1-year warranty.
- ⚡ VARIOUS ELECTRICAL APPLIANCE MONITORING: Comes with 16 50A sensors to accurately monitor your air conditioner, furnace, water heater, washer, dryer, range, etc.
- ⚡ LOWER YOUR ELECTRIC BILL: SEM-Meter measures real-time spending and gets actionable notifications to understand where savings can be made, both to lower your electric bill and to conserve energy and protect the planet’s resources. Be an environmentalist.
- ⚡ REAL-TIME ENERGY DATA: Connect SEM-Meter device via 2.4GHz WiFi to monitor energy usage, with an accuracy range of 1%. View usage in real time through Android/Apple software. Statistics of power usage in now/day/week/month/year format: the validity period of hourly exported data is 90 days, and the exported data of day/month/year data is permanent, available at any time Export from application.
When comparing options, check whether the tariff works with your household’s practical needs:
- Meter and payment eligibility: Check requirements for Direct Debit, standard credit or prepayment, and whether the tariff accepts your meter setup. Ask whether a smart meter will remain in smart mode after a supplier change.
- Time-of-use rates: Check the exact peak and off-peak windows. An overnight rate may suit an electric vehicle or storage heating only if the rates and your actual usage schedule make sense.
- Specialist needs: Check eligibility and terms for electric-vehicle, heat-pump or renewable-energy tariffs. If you generate electricity, compare export arrangements separately.
- Customer service: If service is a reason for leaving, compare complaints and contact performance alongside price. Ofgem points consumers to Citizens Advice’s supplier comparisons.
- Comparison coverage: Different comparison sites may show different suppliers and tariffs. Check more than one site or the supplier’s own offer, and distinguish paid placements from the full set of options.
For a snapshot of the Great Britain price cap, Ofgem’s figures for 1 October to 31 December 2026 set the typical annual benchmark at £1,723 for a Direct Debit, dual-fuel household with average use in England, Scotland and Wales. It is not a cap on an individual household’s total bill: the cap regulates unit rates and standing charges for default standard variable tariffs. Ofgem lists typical rates for that period as electricity 26.32p/kWh and 54.83p/day standing charge, and gas 7.97p/kWh and 29.68p/day. Rates vary by region and payment method; the displayed prices include 5% VAT on gas and no VAT on electricity from 1 October 2026 to 31 March 2027, so they are not directly comparable with earlier periods. Check Ofgem’s price-cap rates and standing charges for the applicable period. Northern Ireland is outside this Great Britain cap.
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- MAXIMIZE SOLAR & ZERO FEED-IN AUTOMATION: Designed for solar homes, the power monitor works with the Refoss app and Home Assistant to automatically use surplus solar power. Appliances like EV chargers, washing machines, and water heaters are powered during midday peaks, maximizing solar self-consumption and reducing low-value electricity feed-in to the grid. Optimizes usage and reduces bills.
- REAL-TIME MONITORING & ±1% ACCURACY: Monitor voltage, current, active power, and power factor of major appliances. Provides ±1% accuracy (200A: 2–200A; 60A: 1–60A) and ±2% at low current. Daily data stored up to 5 years and exportable. With no subscriptions or hidden fees, you get deep historical insights to help you identify every energy-saving opportunity and save 10–20% on monthly bills.
- SMART ALERTS & CIRCUIT-LEVEL CONTROL: Set usage targets for each individual circuit and receive instant alerts when appliances exceed normal consumption. Refoss app supports automation and peak management to optimize schedules, reduce peaks, and improve efficiency. Real-time electricity usage monitor for circuit-level insights.
Should you choose a fixed or variable tariff?
A fixed tariff holds the agreed unit rates and standing charges for the contract term; it does not fix the total bill, which still changes with usage. A variable tariff’s rates can change. Fixing may make budgeting more predictable, but if market rates fall, a fixed deal can leave you paying more than a later variable tariff. Compare the fixed offer with the variable option available to you, and weigh the value of rate certainty against the contract term and any exit fee. Citizens Advice explains the tariff trade-offs in its guide to choosing an energy tariff.
Check exit fees and contract timing
In Great Britain, Citizens Advice says you can switch from a fixed tariff without an exit fee when 49 days or less remain on the contract. If 50 days or more remain, an exit fee may apply. Check the contract or confirm the fee with your supplier before applying; terms can vary. Compare any fee with the estimated savings over the time you expect to stay on the new tariff, and check whether a fee applies separately to gas and electricity.
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- SAFE & RELIABLE: Meross smart energy consumption monitor is ETL‑certified and compliant with the UL 61010 testing standard, ensuring safe and reliable home energy monitoring. Works with most US homes: single-phase 2-wire systems, single-split phase 3-wire systems, and 3-phase 4-wire Wye systems with earthed (TN or TT) neutral (no Delta). Easy clamp‑on design installs in minutes. Invert CT readings in the app—no physical flipping. PROTECTED BY 2-YEAR WARRANTY for worry-free use.
- TRACK ENERGY & CUT BILLS: Track power, voltage, current, and power factor within ±1% accuracy. Clear power usage and cost charts by minute/hour/day/month/year help you easily understand your energy use. Store up to 5 years of data and export hourly reports for deep analysis. Most users save 10–20% on energy costs by spotting energy hogs and getting accurate insights to cut their bills.
- 24/7 ENERGY MONITORING + SMART ALERTS: Real-time home energy monitoring from anywhere. Set custom alerts for unusual usage spikes and threshold breaches for total peace of mind. Catch issues early with no subscriptions, no cloud lock‑in, and no hidden fees — all built-in. Supports 2 main circuits (200A) + 16 branch circuits (60A), making it perfect for precise, circuit-level energy monitoring.
- MAXIMIZE YOUR SOLAR SAVINGS (HOME ASSISTANT): This solar energy monitor integrates with Home Assistant to detect solar surplus and automatically power EV chargers, water heaters, and other high‑use appliances. Stop wasting solar energy—use it yourself and cut your electricity bill faster. The perfect home energy monitor for solar homes.
- LOCAL DATA, FULL PRIVACY, NO SUBSCRIPTIONS: Connect seamlessly with Home Assistant for advanced energy automation. All energy data stays local—no cloud, no delays, no privacy concerns. Take full control of your home energy, reduce waste, and protect your privacy. Supports Open API and Web Control.
Ofgem’s 2025 report on 2024 tariff-choice research found that, in a stated-choice exercise involving 3,235 respondents, the probability of choosing a deal with £300 annual savings and a five-star supplier was 90% without an exit fee and 61% with a £300 exit fee, with other features held at an optimum level. This is an experimental response, not a forecast of real-world switching. The result illustrates why an exit fee can change how attractive a deal appears; it does not tell you whether a particular tariff is worthwhile. Read the Ofgem tariff-choice report.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to switch in Great Britain
- Check your current deal. Find your tariff name, contract end date, unit rates, standing charges, annual use and any exit fee on your bill or online account.
- Compare your current supplier’s options too. You may find a better-fitting tariff without changing supplier.
- Confirm compatibility. Check the new tariff’s meter and payment conditions, including prepayment eligibility, smart-meter operation and any multi-rate meter requirements.
- Check the terms and timing. Calculate the expected saving after any exit fee. If you are near the end of a fixed contract, confirm the contract-specific fee and how to align the start date.
- Apply to the new supplier or through a comparison service. In Great Britain, the new supplier normally contacts your old supplier to arrange the move; you do not need to initiate the switch with the old supplier.
- Use the cooling-off period if needed. A 14-day cooling-off period applies after you agree to the new contract. Citizens Advice says a switch requested as soon as possible should complete within five working days, subject to its start-time rule. If you want the change to coincide with your fixed tariff’s end date, ask the new supplier about a specific date.
- Record a meter reading on switch day. Keep it for your records and provide it as requested. Pay the old supplier’s final bill and check that any account credit is returned. Citizens Advice says the final bill should arrive within six weeks and account credit should be refunded within ten working days after that bill is sent.
See Citizens Advice’s switching guidance for further details on eligibility, timing and final bills. The Energy Saving Trust guide to switching was last updated on 26 June 2026.
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- SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
- INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
- 24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
- LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
- REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
Northern Ireland has a separate comparison and switching route
Do not apply Great Britain’s Ofgem price cap or switching timeline to Northern Ireland. Use the Utility Regulator’s comparison guidance and the Consumer Council comparison tool and price comparison tables. Electricity customers can compare available suppliers; gas supplier choice depends on where they live, with the Utility Regulator identifying the Greater Belfast area for gas supplier choice.
The Utility Regulator says Northern Ireland customers have up to 10 working days to cancel after signing, and a switch should complete within 15 working days after the cooling-off period. Contract terms may specify cancellation charges. Check the regulator’s Northern Ireland switching guidance and local supplier terms before applying.
Quick Recap
A final check before you apply
- Have I compared estimated annual cost using my own annual use, not just the unit rate or monthly payment?
- Have I checked unit rates and standing charges for both fuels, on the correct regional, meter and payment basis?
- Do the contract term, exit fee and tariff type suit how long I expect to stay and how much rate certainty I want?
- Will the tariff work with my meter, payment method and any time-of-use or export needs?
- Have I checked whether my current supplier already offers a suitable deal, and whether other comparison services show additional options?
- Am I following the correct switching route for Great Britain or Northern Ireland?
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
