Pow-K

Technical specifications

See Wiki: https://wiki.amsleser.no/en/Pow-K#technical-specification

Features

• Embedded powerful ESP32 micro controller
• Integrates with smart home systems via MQTT
• Home Assistant auto-discovery
• No cloud server, you control of your data
• Optional user installable temperature sensor (DS18B20), see Pow-K User Manual.
• CE marked, the EU declaration of conformity can be downloaded from here.

Delivered with latest version amsreader-firmware.

Connects to your local wifi, where it displays a web user interface page that can be opened from a device (PC, tablet, phone, ...) connected your internal Wi-Fi network.

If you have a meter with a Kamstrup HAN-NVE module, you can open it and replace the card with a Pow-K+ card, see instructions here.
Or you can buy or 3D-print a holder; STL file is available for download.

Compatible meters

• Kamstrup Omnipower (all models)
• Kamstrup 382M

Other meters: see our Selection guide.

Technical specifications, installation and user guide: Pow-K on our wiki.

Frequently asked questions

Which power meters does Pow-K work with?
Kamstrup Omnipower (all models) and Kamstrup 382M. Pow-K is installed in the meter's expansion bay. For other meters, use Pow-U or Pow-P1 – see the Selection guide.

Does Pow-K need a separate power supply?
No. Pow-K is powered from the meter (operating power 0.3 W).

Does Pow-K need a cloud service or an app?
No. Pow-K connects to your local Wi-Fi and has its own web interface. Data is sent locally via MQTT, with Home Assistant auto-discovery.

Does Pow-K support encrypted HAN data?
Yes. In some countries, for example Denmark, the meter encrypts the HAN data. You then need the encryption keys (DLMS/COSEM format, often called GPK60 and GPK61) from your grid company. See our guide Denmark / encryption keys.