Looks like this is great price. I didn’t track lower than that in CouponsFromChina database ever.
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Product (link)
Price
KWS-306 Voltage Current Power Meter Tuya WIFI Three Phase Four Wire Meter APP Remote Control AC 85-290V 80A Power Protection $4.19
Tuya Wifi Smart Socket EU Plug 16/20A Power Monitor $5.50
Tuya Wifi Smart Socket EU Plug 16/20A Power Monitor $5.52
Tuya Smart WiFi Plug Socket EU Outlet 16A/20A with Power Monitoring $5.62
Tuya Smart Plug WiFi EU 20A Smart Socket With Power Monitor $5.85
Tuya Wifi Smart Plug EU 16A with Power Monitor $7.32
TNCE Tuya Wifi/Zigbee Smart Socket EU Plug 16/20A Power Monitor $7.67
KWS-303 Tuya WiFi Power Meter 0.96-inch TFT 8-in-1 Two-Phase AC Voltage Current Power 85-290V/40A Remote Control Smart Life APP $9.35
Tuya WiFi Smart Plug 16A/20A With Power Monitoring $10.02
Tuya WiFi Digital Smart Energy Meter 100-240V 80A Current Transformer Clamp Solar PV System Power Production Consumption Monitor $12.08
100A Tuya WiFi Din Rail Power Energy Meter AC50-320V Smart Electricity Meter Digital Display Monitor Voltage Curve Ammeter GR2PW $12.63
Tuya WiFi 8 in1 Smart Circuit Breaker Power Meter AC 85-290V Smart Switch Energy Meter APP Control with LCD Voltage Protection $13.22
WiFi Tuya DIN Rail AC Voltmeter Smart Energy Meter Voltage/Current/Power/kWh/PF/Hz/Multi-Function 0.96 Inch 8 In 1 Power Meter $14.03
Tuya WIFI Smart Energy Meter AC100-240V 1CT Clamp App Control 80A Power Monitor Electricity Statistics 50/60Hz Intelligent Life $14.19
8 in 1 Power Meter WiFi Tuya DIN Rail AC Voltmeter Smart Energy Meter Voltage Current Power kWh/PF/Hz Multi-Function 0.96 Inch $14.32
Tuya WiFi Power Meter 2P AC Energy Meter APP Control 85-290V/40A Voltage Current Meter Electricity Consumption Meter Smart Life $14.61
Tuya WiFi Digital Energy Smart Meter Dual Channel 80A Current Transformer Solar PV System Power Production Consumption Monitor $14.65
TOMZN WIFI Smart 6IN1 Meter Din Rail AC Monitor 110V 220V 100A Voltmeter Current Power Factor Active kWh Energy Frequency TUYA $14.88
Tuya WiFi 8in1 Power Meter 2P Multi-function AC Energy Meter APP Control Rail Mounting 170-270V/63A Voltage and Current Meter $14.88
Tuya WiFi 8in1 Power Meter 2P Multi-function AC Energy Meter APP Control Rail Mounting 170-270V/63A Voltage and Current Meter $14.92
8 in1 Din Rail AC Power Meter 85-290V/40A Energy Meter Electricity Usage Monitor for Power Factor Voltage Current KWh Frequency $15.10
Tuya WIFI Smart Energy Meter Bidirection 1, 2 Channel with Current Transformer Clamp App Monitor Power 80A 100V/240V 50/60Hz $15.38
Tuya WiFi Power Meter 2P AC Energy Meter APP Control 85-290V/40A Voltage Current Meter Electricity Consumption Meter Smart Life $15.92
KWS-303 40A Smart Electricity Meter Power Energy Meter Tuya WiFi Din Rail Digital Monitor Kwh Voltage Curve Ammeter AC85-290V $16.09
Tuya Smart Life WiFi Energy Monitor Bidirection 1/2 Channel with Clamp App Monitor Solar Produced and Consumed Power AC110V 240V $16.09
Tuya WiFi 8in1 Power Meter AC Energy Meter Digital Color Screen 2P 170-270V/63A Voltage Current Meter APP Relay Circuit Breaker $16.29
16A Tuya WIFI Smart Socket AC220V 110V Digital Wattmeter EU Plug Electricity consumption Power KWH US AU FR Power Energy Meter $16.42
WIFI Tuya Din Rail AC Monitor Multifunction Energy Power Voltage Current Power Factor KWH Electric Frequency Meter AC85-290V/40A $16.59
Tuya Wifi Smart Energy Meter 80A Current Sensor Solar PV System Power Production Consumption Bidirectional Monitor APP Control $16.61
Tuya WiFi Smart Energy Meter Voltage Current Monitor Power Factor Frequency Metering Digital Display DIN-Rail Electricity Meter $16.73
WIFI Tuya Din Rail AC Monitor Multifunction Energy Power Voltage Current Power Factor KWH Electric Frequency Meter AC85-290V/40A $16.76
WIFI Tuya Din Rail AC Monitor Multifunction Energy Power Voltage Current Power Factor KWH Electric Frequency Meter AC85-290V/40A $16.76
WIFI Bidirectional Energy Meter, 2 Channels, Clamp Current Sensor, Tuya Smart App Monitor, Power 80A, 110V, 240V, 50Hz, 60Hz $17.16
Tuya WiFi Smart Energy Meter DIN-Rail Voltage Current Monitor Power Factor Frequency Metering Digital Display Electricity Meter $17.36
TNCE Tuya WiFi Smart Energy Meter 80A 1/2 Channel with CT Clamp Sensor App Control Power Monitor Electricity Statistics $18.23
80A Current Tuya WiFi Smart Energy Meter Single/Dual Channel Transformer Solar PV System Power Production Consumption Monitor $18.25
Tuya Smart Life WiFi Digital Energy Meter 80A with Current Transformer Sensor Clamp App Monitor Power DIY 110V 240V 50/60Hz $18.66
Tuya Smart WiFi Energy Meter Bidirectional 1/2 Channel with Current Sensor App Monitor Export and Import Power 80A AC110V/240V $19.22
Tuya Smart Life WiFi Digital Energy Meter 80A App Monitor Power DIY 110-240V 1CT/2CT Solar Energy Bidirectional Monitoring Meter $19.65
AC85-265V 16A Tuya WiFi Smart Socket Voltmeter Ammeter Power Meter Curve Electricity Bill Energy Consumption Analyzer Monitor $20.40
AT2P AC110V 220V 100A Tuya Smart Life WiFi Din Rail Remote Control Monitor Kwh Electricity Power Energy Meter 50/60Hz With RS485 $20.42
Tuya WiFi 8in1 Power Meter Electricy consumption Energy Meter 170-270V/63A Voltage and Current Meter AC Digital Energy Tester $21.11
New Tuya WiFi 8in1 Power Meter AC Digital Energy Tester 170-270V/63A Voltage and Current Meter APP Control Relay Circuit Breaker $21.11
AC85-265V 16A Tuya WiFi Smart EU Socket Voltmeter Ammeter Power Meter Curve Electricity Bill Energy Consumption Analyzer Monitor $21.28
6 In 1 Tuya Single Phase Energy Meter AC Electric Din Rail WiFi Smart Kwh Power Consumption Meters Wattmeter Voltmeter Ammeter $22.54
Tuya Smart New WiFi Energy Clamp Bidirectional Meter with Buzzer Alarm for Threshold App Monitor Export Import Power AC110V/240V $23.10
Tuya Smart Life WiFi Digital Energy Meter 63A Din Rail with Current Sensor App Monitor Power Consumption AC 100-230V 50/60Hz $23.23
Mumubiz 80A WiFi Clamp Meter – Tuya Smart Din Rail Energy Monitor, Single Phase Current Statistics Real-Time Power Consumption $23.35
X12A-Tuya Wifi Power Meter Color Screen 2P Multifunction AC Energy Meter Mobilephone Remotely APP Control 170-300V/63A Durable A $24.39
AC 40-300V TUYA Remote Control Wifi Power Energy Meter 100A Din Rail Power Meter Built-in CT Smart WiFi Energy Meter KWH Monitor $25.78
Tuya WiFi Bidirectional Energy Meter Single Phase 80A kWh Power Monitor Wattmeter Voltmeter Ampermeter 110 240VAC Remote Control $28.67
Tuya WiFi Smart Power Socket Wattmeter APP Remote Control 0-100A 85-265V AC Power Meter Electricity Meter Multi-energy Monitor $28.98
80A Tuya WiFi Zigbee Smart Energy Meter 2CH Current Sensor Clamp Remote Control KWH Electric Statistics Power Monitor AC100-240V $29.98
Tuya WiFi Power Meter Socket AC 220V LCD Electric Energy Meter Smart Timer Switch EU Plug Undervoltage Overcurrent Protector $30.32
WIFI Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire Rail Over Under Voltage Protector Electricity Meter $33.18
80A Tuya WIFI Smart Life Voltage Meter AC 85-290V Electric Meter 3-phase 4-wire DIN-Rail Energy Monitor KWS Current Power Meter $33.21
TUYA Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity Meter $33.26
AC 85-290V/80A Energy Power Meter Color Screen 3-phase 4-wire Rail Meter Voltmeter 6 Power-off Protection Meter Remote Control $33.50
KWS-306 AC 85-290V 80A Voltage Current Power Meter Works with Tuya WIFI Intelligent Rail Meter Energy Meter Remote Control $34.16
KWS-306 Power Meter 3 Phase 4 Wire Multi-function Energy Meter AC 85-290V Voltage Current Meter Electricity Meter with/no WIFI $34.44
TUYA Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity Meter $34.51
KWS-306 Tuya WIFI Power Meter 3-phase 4-wire railed Energy Voltage Current Meter APP Remote control AC 85-290V 80A Volt-ammeter $34.58
Tuya Wifi Power Energy Meter Color Screen 3 Phase 4wire Rail Meter AC Monitor KWh Tester Voltage Current Protection Relay Switch $34.61
KWS-306 Tuya Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity $34.98
TUYA Wifi/NO Wifi Power Energy Meter DIN Rail 3 Phase Electric Wattmeter AC 85-290V Electricity Monitor Switch Voltage Protector $35.20
APPLIA-2X TUYA WIFI Energy Meter Din Rail Mount Digital Voltmeter Ammeter Wattmeter AC 100-290V Kwh Power Meter Remote Control $35.48
TUYA Wifi/NO Wifi Power Energy Meter DIN Rail 3 Phase Electric Wattmeter AC 85-290V Electricity Monitor Switch Voltage Protector $35.89
KWS-306 Tuya WIFI Power Meter 3-phase 4-wire railed Energy Voltage Current Meter APP Remote control AC 85-290V 80A Volt-ammeter $36.05
80A Tuya WIFI Smart Life Voltage Meter AC 85-290V Electric Meter 3-phase 4-wire DIN-Rail Energy Monitor KWS Current Power Meter $36.16
AS95-Zigbee Wifi Energy Meter Bidirectional With Clamp Current Sensor Tuya Smart App Monitor Power 80A 240V, 2 Channels 2CT Dura $36.62
KWS-306 Tuya WIFI Power Meter Volt-ammeter 3-phase 4-wire railed Energy Voltage Current Meter APP Remote control AC 85-290V 80A $37.11
KWS-306 Tuya WIFI Power Meter Voltage Current Energy Meter Three Phase Four Wire Rail Phone APP Remote Control AC 85-290V 80A $37.20
TUYA Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity Meter $37.86
KWS-306WF Tuya Wifi Din Rail Power Energy Meter 3 Phase 4-wire AC 85-290V Smart Electricity Meter Over Under Voltage Protector $38.25
Tuya WiFi Smart Power Socket 230V APP Remote Control WIFI Wattmeter AC Power Meter Electricity Consumption EU Plug Energy Meter $41.31
KWS-306L WIFI Energy Meter Power Meter DIN Rail 3 Phase 4 Wire Voltage AC 85-290V Voltmeter Amps Watt Kwh Meter Color Screen $42.03
Tuya WiFi ZigBee Smart Energy Meter AC 110V 220V 80A Bidirectional measurement Single Phase Power Consumption Monitor kWh Meter $43.66
Wifi Zigbee 110V 220V 80A Tuya Smart Single Phase Two-way Bidirectional Energy Meter Timer Power Consumption Monitor KWh Meter $43.85
80A Tuya WIFI Smart Life Voltage Meter AC 85-290V Electric Meter 3-phase 4-wire DIN-Rail Energy Monitor KWS Current Power Meter $44.93
Tuya Smart 3 Phase WiFi Energy Meter 80A CT Bidirectional with Dry Contact Switch 16A App Monitor Export Import Power AC90-250V $66.51
Three Phase AC380V Tuya WiFi Smart Bi-Directional Energy Power kWh Meter Over Under Voltage Protector Relay Switch Current Limit $66.53
TOMZN 2 Phase 110V+110V 60Hz 80A Din Rail Tuya WIFI Smart Energy Meter Power Consumption Monitor kWh Meter Wattmeter $71.24
Tuya WiFi 3 Phase Electric Power Meter 80A/120A/200A/300A/500A Bidirectional Energy KWH Instrument Monitor With 3CTs Relay $71.43
TUYA WiFi Smart Three Phase AC90-480V Bi-Directional Measurement Power Energy kWh Meter Monitor with 3PCS CT Clamps Switch Relay $76.54
Tuya ZigBee WiFi Smart 3 Phase Energy Meter KWh Power Monitor Single Phase 500A 300A 200A 120A 80A CT Clamp Current Transformer $78.10
3 phase 80A TOMZN Tuya WIFI Smart Bidirectional Energy Meter timer Power Consumption Monitor kWh Meter Wattmeter SMARTLIFE $80.20
Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity Meter $97.40
Here is price history (for all/most countries) for Tuya Wifi Power Energy Meter AC Monitor AC 85-290V 80A. The lowest price was: $33.99.Banggood Price Alert
Tuya Wifi Power Energy Meter AC Monitor AC 85-290V 80A 3 Phase 4-wire DIN Rail Over Under Voltage Protector Electricity Meter – KWS-306WF with wifi 
