3-Phase WiFi Tuya Relay KOWSI KWS-306WF — Worth Buying?

Опубликовано 24 апреля 2026, 14:47

A review of the KOWSI KWS-306WF with tests, settings, teardown, and all the main capabilities of this 3-phase WiFi Tuya relay.
👉 Product link: s.click.aliexpress.com/e/_EHxM... or alli.pub/7byytc, or enter the search code [AYH1KW] on the AliExpress homepage.
In this video, I will show in detail what the KOWSI KWS-306WF can really do in practice: we will check how it works in the Tuya smart home ecosystem, look at the local settings using the buttons, test how it responds to different limits, evaluate automations, check integration with Home Assistant, and of course take the device apart to understand how seriously it is built inside.
This is not just a 3-phase WiFi relay for a DIN rail, but a device with monitoring of voltage, current, power, mains frequency, and temperature through an external sensor. The manufacturer claims protection against overheating, overvoltage and undervoltage, overcurrent, overpower, as well as protection against voltage imbalance and current imbalance between phases. But in this review, it is important not only to look at the list of functions, but also to understand how all of this works in real life, how convenient the app is, how quickly the relay reacts to limits, and what exactly we get in practice.
In the review, I will show the appearance of the KOWSI KWS-306WF, the three-phase connection, the operation of the display, statistics for each phase, the capabilities of the Tuya / Smart Life app, timers, automation scenarios, operation through Tuya and Local Tuya in Home Assistant, as well as the internal design with an inspection of the electronics and the power section. We will also separately look at how suitable this relay really is as a device for monitoring and limiting load, and whether it can be considered a full protective solution.
Among the strong points here are an interesting internal layout, a separate power section, detailed statistics in the Tuya app, and a large number of settings. At the same time, Home Assistant still receives very little data, so there is unfortunately no full deep integration here. So this video will not be just an unboxing and a superficial overview, but a real practical check, tests, and conclusions about the actual capabilities of the device.

This video will be useful for those who are looking for:
✔ 3-phase WiFi Tuya relay
✔ KOWSI KWS-306WF review
✔smart DIN rail relay
✔ 3 phase relay Tuya
✔ voltage and current control relay
✔ relay for electrical panel
✔ WiFi electricity meter
✔ Tuya Smart Life automation
✔ Home Assistant Tuya
✔ three-phase relay with monitoring

👉 Link to the test screwdriver: s.click.aliexpress.com/e/_EwQs... or alli.pub/7byysy
👉 Other useful smart home products: s.click.aliexpress.com/e/_Ew38...

Don't forget about discount coupons - it's always cheaper!
$3 off on orders over $29:IFPCUSDP
$6 off on orders over $59:IFPRLYYP
$9 off on orders over $89:IFPJJPCT
$16 off on orders over $149:IFPY5QBF
$23 off on orders over $199:IFPZL0N1
$30 off on orders over $269:IFP5MQDG
$40 off on orders over $369:IFPFHJDN
$50 off on orders over $469:IFPMLVDD
$60 off on orders over $599:IFPILFVB
$70 off on orders over $699:IFPSCSOE

📌 Telegram channel, coupons, new products, promotions @Lubops – t.me/Lubops
💬 Topics for communication on smart home – t.me/china_smart_home
🌐 China in smart home Facebook – facebook.com/EvgenLubops
🎁 Support the channel: github.com/EvgenLubops/Donate – all capabilities + crypto wallets
DONATELLO: donatello.to/Lubops
PayPal: paypal.com/donate/?hosted_butt...
Buy Me A Coffee: buymeacoffee.com/EvgenLubops

00:00 Introduction
00:51 KOWSI KWS-306WF Specifications
02:09 Packaging and Contents
00:51 Appearance and Connection
03:22 Screen and Displayed Parameters
04:35 Comparing the Readings with a Multimeter
05:39 Relay Settings and Features
09:41 Protection Test
10:47 Connecting to Tuya
11:24 Tuya App and Main Features
15:42 Automations in Tuya
17:57 Home Assistant Integration
19:12 Device Teardown
21:30 Conclusions

Write in the comments what you think about the KOWSI KWS-306WF and whether you would use such a 3-phase WiFi relay at home, in a workshop, in a server room, or in an electrical panel. And it will be especially interesting to read whether you see such devices primarily as protective relays or rather as smart devices for monitoring, limiting, and controlling load.

#KOWSI #KWS306WF #Tuya #HomeAssistant #WiFiRelay #PowerMeter #ElectricityMeter #ThreePhase #aliexpress #aliexpresshaul #aliexpresfinds