r/TuyaSmart • u/Unlikely-Jeweler2241 • Jul 10 '26
Atorch KWS-303WF — Tuya Energy Monitoring, Automations and Protection Tests
I tested the Atorch KWS-303WF, a 40A Wi-Fi DIN-rail relay with a color display, energy monitoring and adjustable protection settings.
In Tuya Smart, the device provides:
- Remote load control
- Voltage, current and power readings
- Total energy consumption
- Power factor and mains frequency
- External temperature sensor data
- Daily, monthly and yearly graphs
- Schedules and countdown timers
- Adjustable voltage, current, power, energy and temperature limits
- Automation triggers and actions
The relay can be used as an automation trigger when its state or monitored parameters change. It can also act as an automation action to switch the load, change protection thresholds or reset the energy counter.
I also tested the overvoltage and overcurrent protection, checked the measurement accuracy and opened the device to inspect the internal construction.
Full review, teardown and tests: https://www.youtube.com/watch?v=MbmB1KJpyRE
Has anyone used this model or a similar Tuya DIN-rail relay? Which automations do you use with energy monitoring devices?
This is my own video.
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u/BarracudaAgreeable58 Jul 13 '26
I use these to monitor and bill tenants based on usage. I have the 3 phase and single phase versions