Open box Shelly EM Single-phase energy meter with 2 channels + clamp (1x 50A transformer)

What does "open box" mean?

Open-box products are returned products with opened or damaged packaging, but fully checked from a technical point of view and completely functional. They come with the same warranty as new products.

The Shelly EM + 50A is the complete version of the Shelly EM energy meter, supplied with a 50A current clamp (CT clamp), ready to install with no need for a separate purchase. With two independent measuring channels, the device allows real-time monitoring of power, voltage, current and energy consumed on circuits with loads of up to 50A, suitable for monitoring a main electrical panel or a large load, such as a heat pump or an electric car charger.

Installation is done without interrupting the existing circuit, as the clamp is simply fitted around the live cable. The built-in relay can be used to control a contactor, automatically switching off a load when a power threshold set by the user is exceeded, a useful function for protecting the installation and avoiding overloading the electrical panel.

It is the right choice for anyone who wants to start energy monitoring without having to look for the right clamp separately: the complete Shelly EM + 50A package provides everything needed to get accurate consumption data on an important circuit in the home or business, directly in the Shelly app, with history and charts, and API access for custom integrations.

Practical use cases

• Mounted on the main electrical panel, it gives a real-time picture of the total consumption of the home, helping to identify the appliances that use the most energy.
• Used to monitor a dedicated circuit (air conditioning, heat pump, electric car charger), it lets you track the monthly costs of each individual load.
• Useful in systems with their own energy production (photovoltaic panels), to compare the energy produced with the energy consumed and optimise the use of large appliances during peak production hours.
• Sends alerts in the app in case of abnormal consumption, helping to quickly detect faulty equipment.

Technical specifications

The Shelly EM + 50A is the complete package for quickly monitoring an important circuit, with no additional accessories to look for or buy separately.