--- title: "Aclara smart meter: how to read and troubleshoot" description: "Aclara smart meter: learn how to read your Aclara SGC 1311 or SGM1312 meter, troubleshoot common issues, and understand its SMETS2 compliance." url: "https://www.fuseenergy.com/blog/aclara-smart-meter" updated: "2026-10-15" --- # Aclara smart meter: how to read and troubleshoot Aclara smart meters are a common sight in UK homes, playing a key role in the country's energy landscape. These advanced devices measure your home's electricity and gas consumption, sending data directly to your energy supplier. Understanding how your Aclara meter works, how to read it, and how to troubleshoot common issues can help you manage your home's energy effectively. Aclara smart meters provide clear insights into your energy usage. Fuse Energy offers clear pricing and a digital-first experience to help you make the most of your smart meter. Click [here](https://www.fuseenergy.com/app/boarding/premises) to switch to Fuse Energy today. ## What is an Aclara smart meter? Aclara is a significant manufacturer of smart meters in the UK, crucial to the nationwide rollout of modern energy metering technology. Aclara smart meters are advanced devices that measure your home's electricity and gas consumption and communicate this data directly to your energy supplier. This automated process means you receive more accurate bills and can monitor your energy usage in near real-time, often via an In-Home display (IHD) or your supplier's app. ### SMETS2 compliance and benefits Smart meters in the UK adhere to specific technical standards, primarily SMETS1 (first-generation) and SMETS2 (second-generation). SMETS2 meters are the current standard and offer enhanced functionality, particularly improved interoperability between different energy suppliers. This means that if you have an Aclara SMETS2 meter, it should maintain its smart functionality even if you change suppliers. SMETS2 meters connect to a secure national network run by the Data Communications Company (DCC), overseen by Ofgem, ensuring data privacy and security. This network allows for automated meter readings, reducing the need for manual submissions and leading to more accurate billing. ### Common Aclara models: SGC 1311 and SGM1312 Aclara produces various smart meter models, with the SGC 1311 and SGM1312 being common in UK homes. The Aclara SGM1300 Series meters, including the SGM1311, are often SMETS1 models and typically come with an Aclara communications hub. SMETS2 Aclara SGM1400 Series meters, such as the SGM1412-B, use a different communications hub, usually branded as Toshiba or WNC. Aclara has also introduced SMETS2 polyphase electricity meters, like the SGM1430-B, which are designed for properties with higher electricity demands, including some larger residential sites. ## How to read your Aclara smart meter Understanding how to read your Aclara smart meter's display is essential for tracking your energy consumption. ### Reading your electricity meter To get a reading from your Aclara electricity meter, usually found near your fuse box or consumer unit, you may need to wake up the display. * **Wake the display:** If the screen is blank, press one of the buttons (often labelled 'A', 'B', 'OK', or with an arrow) to activate it. * **Navigate to reading:** You may need to press the button multiple times to cycle through the information until you find the 'TOTAL' or 'READ' screen, which shows your cumulative electricity consumption in kilowatt-hours (kWh). For Aclara SMETS2 electricity meters, pressing 'A' to wake the screen, then continuing to press 'A' until you see 'TOTAL Active Import' will show your electricity reading. For two-rate tariffs (like Economy 7), you will typically find 'TOU Rate 1' for daytime and 'TOU Rate 2' for night-time readings. ### Reading your gas meter Aclara gas meters are typically located near your gas supply inlet, often outside or in a utility cupboard. * **Wake the display:** The display on a gas smart meter often goes blank to save battery power. Press a button (usually 'A' or 'OK') to activate the display. * **View reading:** The screen should then show your current gas reading, usually in cubic metres (m³) or cubic feet (ft³). Your energy supplier converts this volume into kilowatt-hours (kWh) for billing purposes. For a smart gas meter, pressing '9' on the keypad should display "VOLUME" and then your gas reading in cubic metres. ### Locating your meter Serial Number The Meter Serial Number (MSN) is a unique identifier for your meter. It is usually printed near the barcode on the front of the meter. For Aclara SMETS2 electricity meters, the MSN might start with '17M', '18M', '19M', '20M', '21M', or '22M' depending on the year of manufacture. For gas smart meters, the MSN can often be found below the display and may start with 'G4F'. You can also find your MSN on your energy bill or through your energy supplier's app. ## Understanding Aclara smart meter lights and display messages Your Aclara smart meter uses indicator lights and display messages to communicate its status. Understanding these can help you quickly diagnose potential issues. ### Interpreting flashing lights A common indicator is a flashing red light. On many Aclara smart meters, a flashing red light typically indicates that the meter is actively recording energy consumption. The speed of the flash can sometimes correspond to the rate of energy use - a faster flash might mean higher consumption. This is generally normal operation and not a cause for concern. However, if the light is solid red or behaving unusually, it could signify a fault, and you should consult your energy supplier. On a SMETS2 communications hub, indicator lights like SW (Software), WAN (Wide Area Network), HAN (Home Area Network), and GAS (Gas Meter) show the functional status of the metering system. * A slow flash rate (e.g., 1 flash per 5 seconds) typically means the process is in its normal state and communicating correctly. * A flash rate of 1 flash per second can indicate a transient state, such as making a communications connection. * A fast flash rate (e.g., 2 flashes per second) can signal an error; contact your supplier if this persists for over 48 hours. ### Common display symbols and alerts Aclara smart meters use various symbols and messages to provide information. These can include: * **Signal strength indicators:** Some Aclara smart meters display signal strengths for the Home Area Network (HAN) and Wide Area Network (WAN) using a five-bar scale, similar to a mobile phone. The WAN signal indicator is usually in the bottom right corner, and the HAN indicator in the bottom left. * **Credit/Debt balance:** For prepayment meters, the display will show your current balance, emergency credit status, and any accumulated debt. * **Error messages:** If there is a problem, the meter may display specific error codes or messages. These can indicate communication issues or internal faults. If you see an unfamiliar message, it is best to consult your energy supplier. ## Troubleshooting common Aclara smart meter issues While Aclara smart meters are generally reliable, you might encounter occasional issues. Here is how to approach common problems. ### Your Aclara smart meter is not connecting If your Aclara smart meter is not connecting or appears offline, it means it is not sending automatic readings to your supplier, which can lead to estimated bills. * **Check the In-Home display (IHD):** If your In-Home display is also not receiving data, it suggests a communication issue. * **Location:** Ensure nothing is obstructing the meter or its communication hub (often integrated into the electricity meter). Large appliances or thick walls can sometimes interfere with the signal. * **Contact supplier:** If your meter has gone offline, or the WAN light is flashing red, indicating a lost connection to the national smart meter network, contact your energy supplier. They can remotely check the meter's status and arrange for an engineer if necessary. ### What to do if your gas meter battery is low or dead Gas smart meters are battery-powered, and their batteries are sealed units that cannot be replaced by the user or an engineer. When the battery is depleted or failing, the entire gas meter needs to be exchanged. There is no "battery replacement" service for gas meters. A dead battery on an older SMETS1 gas meter can cause the internal safety valve to close, cutting off the gas supply until the meter is exchanged. ### Emergency credit and top-ups For prepayment Aclara smart meters, emergency credit is a lifeline when your balance runs low. * **Activating emergency credit:** You can typically activate emergency credit directly on your meter when your balance drops below a certain threshold. You will usually need to press specific buttons to navigate to the emergency credit option and activate it. * **Topping up:** If your payment has not reached your meter, you can manually enter a top-up code (UTRN) using the meter's buttons. You will use buttons to select digits and move between them to input the 20-digit code. * **Restoring supply:** If your supply has disconnected due to low credit, you will need to top up or activate emergency credit, then re-enable the supply. This usually involves pressing a combination of buttons when the display shows "RELAY ARMED" or a similar message. Always ensure all appliances are switched off before attempting to reconnect the supply. ## Getting the most from your Aclara smart meter Aclara smart meters offer a modern way to manage your home's energy, providing clear insights into your usage. ### Using your In-Home display Your In-Home Display (IHD) works with your Aclara smart meter to show your energy consumption in near real-time. This allows you to see how much electricity and gas you are using in pounds and pence, helping you understand your energy habits and identify areas where you can save. Keeping an eye on your IHD can be a powerful tool for managing your energy budget. For more ways to reduce your usage, explore our energy saving tips. ### Connecting with your energy supplier's app Many energy suppliers offer apps that integrate with your smart meter data, providing a more detailed view of your energy consumption. These apps can complement your Aclara smart meter's readings, offering insights into daily, weekly, or monthly usage patterns. Fuse's app, for example, provides clear energy usage data, complementing your Aclara smart meter's readings and helping you understand your consumption. This can also help you better understand your energy bill. If you have questions or need assistance with your Aclara smart meter, Fuse's 24/7 human customer support team is available to help, offering reliable assistance when you need it. Understanding your Aclara smart meter empowers you to manage energy consumption effectively, putting you in control and helping you benefit from abundant energy. Fuse provides accurate, clear information, such as clarifying that gas meters are replaced when their battery is depleted, to help you fully understand and utilise your Aclara meter. > **What is the average UK home energy consumption?** > > According to Ofgem, the average UK home uses around 2,500 kWh of electricity per year and 9,500 kWh of gas per year. These figures, known as Typical Domestic Consumption Values (TDCVs), are used for consistent energy price comparisons. Managing your energy bills should be clear and easy to understand. Fuse Energy focuses on straightforward pricing, so you can see exactly what you are paying without unnecessary complexity. If you have a smart meter, you can view detailed usage data through the app or website, helping you understand how you can lower your bills. Our 24/7 human support team is always on hand with fast response times whenever you need help. Click [here](https://www.fuseenergy.com/app/boarding/premises) to switch to Fuse Energy today. Find out about our mission by clicking [here](https://www.fuseenergy.com/mission). --- Rates, availability, and regional off-peak windows change. Check the source page for current terms. **Disclaimer** For the avoidance of doubt, this article is provided for informational purposes only and is not intended to constitute legal or financial advice. The author and/or Fuse Energy shall not be responsible for any losses arising out of any reliance on the information contained herein.