SELEC EM2M-1P-C-100A Multifunction energy meter 1 phase (SPECTRUM TECHNOLOGY)

I purchased the SELEC EM2M-1P-C-100A multifunction energy meter for my home energy monitoring project, and it has been a great addition to my smart home setup. The meter has a clear display that makes it easy to check power readings directly on the device. What I particularly like is how easily it can be integrated into DIY home automation projects. I connected it to an ESP8266 NodeMCU using an RS485 interface and integrated the readings into Home Assistant through ESPHome. One of the biggest advantages is that ESPHome already has a dedicated SELEC meter component with the required register handling and support for various measurement values. You mainly need to configure the component in your ESPHome setup and connect the hardware correctly, rather than manually implementing the register communication from scratch. This makes integration much easier for DIY enthusiasts. I can now monitor parameters such as voltage, current, active power, power factor, frequency, and import/export energy directly on my custom Home Assistant dashboard. It is very useful for understanding household electricity usage and building personalized energy monitoring automations. What I liked: 1. Clear and easy-to-read display. 2. Multiple useful electrical measurements in one device. 3. Dedicated ESPHome component with register handling and support for various sensor values. 4. Convenient integration with ESP8266/ESP32-based projects using a compatible RS485 interface. 5. Works well for creating a customized Home Assistant energy dashboard. 6. Great potential for DIY IoT, smart-home automation, and real-time energy monitoring. Overall, this is a useful choice for anyone interested in home energy monitoring, IoT projects, or smart-home automation. If you enjoy building your own monitoring system instead of depending entirely on a proprietary app, this meter is worth considering. Make sure to follow the electrical safety requirements and verify the wiring, RS485 communication settings, and ESPHome configuration before connecting it to your system.

Good product but costly

Pros: - 1. Perfect meter for household (single phase) metering application. 2. MODBUS protocol allows interfaces over IoT to other boards for remote monitoring of power consumption. 3. MODBUS communication is isolated from mains high voltage (safe to use). 4. Monitor all parameters -- V, I, PF, Freq, KVAR, KW, KVA.. 5. User manual explains all address and means to interface with MODBUS master. 6. Form factor is same as MCB. Hence fits perfectly inside switch box. 7. Made in India. Cons: - 1. Slightly expensive. 2. Manufacturer (Selec) never responded to any of my query. I had received replies from China and Taiwan for similar meter, but never from Selec (Mumbai).

Working very well. Recommend to all.

I wanted to use it as zero export device on my growatt inverter. Unfortunately this device was not compatible with that. I had to return it otherwise it is an India made product with decent quality and functionality . One of the best energy meter out there. You can easily monitor imorted and exported energy.

Cheap quality inside circuit is poor

Good product good brand, good price fast delivery . This is a best product available in market. Best buy from amazon

Very good product working perfectly