







⚡ Empower your energy. Automate your future.
The Shelly Pro 3EM Switch Add-On is a compact, DIN rail-mounted device that extends the capabilities of the Shelly Pro 3EM by providing dry contact relay control. It enables real-time 3-phase energy monitoring and smart load management for solar panels, wind turbines, and other electrical systems. With seamless WiFi and Ethernet connectivity, plus no hub required, it offers professional-grade automation via a polished iOS/Android app. Ideal for energy-conscious professionals seeking efficient, scalable home or business energy control with a 5-year warranty and robust customer support.










| ASIN | B0C718B37C |
| Best Sellers Rank | #28,648 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Industrial Power Meters |
| Date First Available | June 27, 2023 |
| Item Weight | 0.705 ounces |
| Item model number | Shelly_Pro_Add |
| Language | English |
| Manufacturer | Shelly |
| Product Dimensions | 4.72 x 2.36 x 7.48 inches |
T**M
Works perfectly and easy to install / setup
Excellent product and easy installation. Allows me to monitor a remote condo and keep tabs on the HVAC and power consumption. The app is well polished and provides all the information and control you would expect with this device
D**A
Cool power monitor/relay great interfaces
Outstanding piece of kit. WiFi and wired Ethernet, web, JSON, Matter, Modbus and more all built in. Mine worked right out of the box. Got ic controlled via the web and MODBUS TCP. Handy device priced right.
C**E
Pro level current meter at a bargain price!
Fantastic current meter! The bonus is built in Ethernet! Small size will fit in tight spaces and easy install. Great function, except for some reason data download is not working right. There is also connection point for 1 more CT, but last I checked it is not sold separately. AND I wish there was short piece of DIN rail in box.
D**E
Works great when integrated with HomeAssistant
Great product generally, although there are a couple issues with the REST API if you're trying to write your own code to control it. Bad SSL certificate for https, and it rejects https requests anyway with a 443 error, yet it also does a strange redirect to https when you call http on port 80. I tried updating the firmware but issue remains. Integrated with HomeAssistant and called that API instead, which works great. Would be 5 stars if not for the odd issues with restful calls.
B**N
Excellent tool to keep historical power usage.
Monitoring various branches of my inverted AC outputs to various appliances. Works great and is very accurate. These measurements are logged on charts for historical monitoring. Easy install and no programming needed.
G**.
WOW
I love it. Definitely is the amazing device and so easy to install. Perfect size. The connectivity is so great.
M**N
Great product
Worth the value, high quality and reliable
G**I
👍
Easy to install and does what it claims to do..
B**.
Monitor e registo de consumo, voltagem e corrente, permitindo IoT, exporta CSV, para mono, bi e trifásico, incluindo crédito de sistema solar (registra produção). Muito versatile e compacto. Qualidade e precisão TOP
A**E
Ottimo prodotto, richiede un minimo di impegno per l'installazione. Peccato solo non ci sia né nell'interfaccia nè nell'app cliud un indicatore della massima potenza consumata. Sarebbe molto utile. Usato per monitorare sia il consumo totale che quello della linea cucina di casa.
G**T
Fácil instalación en el cuadro eléctrico, viene con 2 pinzas amperimétricas. Yo no tengo mas productos de Shelly, así que no puedo opinar sobre la integración domótica. Lo uso para el monitoreo de las placas solares. La app te permite monitorizar en tiempo real el consumo de energía de la vivienda, la producción de las placas solares y el volcado/consumo de red o baterías. Gráficas diarias, por mes, año, etc. Funciona con la wifi de casa y te da información suficiente y bastante exacta sobre tu consumo energético en cualquier momento y lugar. Solo encuentro a faltar en la app, disponible en apps de otos medidores (y otros precios), el diferenciar el consumo por electrodoméstico. De momento sin problemas de funcionamiento y satisfecho con la comprs.
D**Z
Funciona perfecto y es super útil para el monitoreo de todo el cuadro eléctrico mas 2 cargas. Tambien lo he usado para monitorear motores trifasicos, es genial!
B**T
il faudrait un paramètre pour définir TETRAPOLAIRE avec Neutre et TRIPHASE avec neutre à la terre tension entre phase et tension entre phase et neutre...
Trustpilot
5 days ago
2 months ago