{"product_id":"meterlink-c3","title":"MeterLink C3","description":"\u003ch3\u003eBring your Kamstrup OMNIPOWER meter into Home Assistant—locally\u003c\/h3\u003e\n\u003cp\u003eMeterLink C3 is a compact Wi‑Fi communications module that connects a compatible Kamstrup OMNIPOWER electricity meter to your local Home Assistant installation.\u003c\/p\u003e\n\u003cp\u003eIt reads encrypted DLMS\/COSEM data directly from the meter’s HAN interface, decrypts it locally and publishes the measurements through MQTT. No cloud service, subscription or external data provider is required.\u003c\/p\u003e\n\u003ch2\u003eAvailable measurements\u003c\/h2\u003e\n\u003cp\u003eDepending on the meter configuration, MeterLink C3 exposes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImported and exported energy\u003c\/li\u003e\n\u003cli\u003eCurrent import and export power\u003c\/li\u003e\n\u003cli\u003eVoltage on all three phases\u003c\/li\u003e\n\u003cli\u003eCurrent on all three phases\u003c\/li\u003e\n\u003cli\u003eImport and export power per phase\u003c\/li\u003e\n\u003cli\u003eWi‑Fi signal strength\u003c\/li\u003e\n\u003cli\u003eHAN and communication health\u003c\/li\u003e\n\u003cli\u003eFirmware and diagnostic information\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHome Assistant MQTT Discovery creates the supported entities automatically.\u003c\/p\u003e\n\u003ch2\u003eDesigned for local operation\u003c\/h2\u003e\n\u003cp\u003eAll meter data remains on your local network. MeterLink C3 communicates directly with your MQTT broker and does not depend on an external cloud platform.\u003c\/p\u003e\n\u003cp\u003eA built-in web interface provides:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLive meter readings\u003c\/li\u003e\n\u003cli\u003eWi‑Fi, MQTT and HAN connection status\u003c\/li\u003e\n\u003cli\u003eStored-energy and power-source information\u003c\/li\u003e\n\u003cli\u003eConfiguration backup and import\u003c\/li\u003e\n\u003cli\u003eSecure, signed firmware updates\u003c\/li\u003e\n\u003cli\u003eTroubleshooting diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIntelligent power management\u003c\/h2\u003e\n\u003cp\u003eMeterLink C3 is designed around the limited power available from the meter’s HAN interface.\u003c\/p\u003e\n\u003cp\u003eAn internal supercapacitor stores energy for short Wi‑Fi current peaks. The module automatically adjusts its operating profile according to its power source:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOn HAN power, Wi‑Fi remains connected while power-saving features reduce average consumption.\u003c\/li\u003e\n\u003cli\u003eWhen USB is connected, MeterLink C3 switches to full-performance operation.\u003c\/li\u003e\n\u003cli\u003eFirmware updates temporarily enable the required radio performance and are permitted only when sufficient stored energy is available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUSB and HAN power are isolated through an automatic power-selection circuit to prevent one source from feeding into the other.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eDesigned for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible Kamstrup OMNIPOWER electricity meters\u003c\/li\u003e\n\u003cli\u003eThe six-pin, 2×3, 2.54 mm HAN connector\u003c\/li\u003e\n\u003cli\u003eEncrypted DLMS\/COSEM Push1 telegrams\u003c\/li\u003e\n\u003cli\u003e2.4 GHz Wi‑Fi networks\u003c\/li\u003e\n\u003cli\u003eMQTT brokers, including the Home Assistant Mosquitto add-on\u003c\/li\u003e\n\u003cli\u003eHome Assistant installations with MQTT Discovery enabled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYour electricity network operator must activate the HAN interface and provide the meter-specific encryption and authentication keys.\u003c\/p\u003e\n\u003cp\u003eCompatibility depends on the meter model, firmware, connector and HAN configuration. Check these details before ordering.\u003c\/p\u003e\n\u003ch2\u003eInstallation overview\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003eObtain the two HAN encryption keys from your network operator.\u003c\/li\u003e\n\u003cli\u003eConfigure Wi‑Fi, MQTT and meter keys through the setup interface.\u003c\/li\u003e\n\u003cli\u003eDisconnect USB and insert MeterLink C3 into the meter’s HAN socket.\u003c\/li\u003e\n\u003cli\u003eAllow the internal energy reservoir to charge.\u003c\/li\u003e\n\u003cli\u003eFind MeterLink C3 under Home Assistant’s MQTT devices.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe product should only be installed in an accessible, authorized HAN socket. Do not open the sealed or mains-voltage section of the electricity meter.\u003c\/p\u003e\n\u003ch2\u003ePrivacy and security\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLocal-only meter-data processing\u003c\/li\u003e\n\u003cli\u003eNo mandatory cloud account\u003c\/li\u003e\n\u003cli\u003eNo subscription\u003c\/li\u003e\n\u003cli\u003ePer-device administration password\u003c\/li\u003e\n\u003cli\u003eAuthenticated configuration interface\u003c\/li\u003e\n\u003cli\u003eCryptographically signed firmware updates\u003c\/li\u003e\n\u003cli\u003eMeter keys stored on the device\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlain MQTT should only be used on a trusted local network. MQTT TLS can be configured when supported by your broker.\u003c\/p\u003e\n\u003ch2\u003ePackage contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMeterLink C3 communications module\u003c\/li\u003e\n\u003cli\u003eIntegrated HAN connector\u003c\/li\u003e\n\u003cli\u003eInternal supercapacitor energy reservoir\u003c\/li\u003e\n\u003cli\u003eQuick-start and safety guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eElectricity meter, USB cable, MQTT broker and Home Assistant hardware are not included.\u003c\/p\u003e\n\u003ch2\u003eImportant notice\u003c\/h2\u003e\n\u003cp\u003eMeterLink C3 is an independent product and is not manufactured, endorsed or supported by Kamstrup A\/S or the Home Assistant project. Kamstrup and OMNIPOWER are trademarks of their respective owner. Home Assistant is a trademark of the Open Home Foundation.\u003c\/p\u003e\n\u003ch3\u003eMeterLink C3\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYour electricity meter. Your local data. Your Home Assistant.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Zeeq Solutions","offers":[{"title":"Default Title","offer_id":54846458921297,"sku":null,"price":479.0,"currency_code":"DKK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1072\/8203\/9121\/files\/Screenshot2026-09-10190414.png?v=1789059881","url":"https:\/\/zeeq.store\/products\/meterlink-c3","provider":"Zeeq Solutions","version":"1.0","type":"link"}