Open box Energy meter Sonoff POWCT, with 50A transformer included, Wi-Fi
Description
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.
Sonoff POWCT smart energy meter, WiFi, 50A CT transformer included, consumption monitoring, contactor control
Sonoff POWCT is a WiFi energy meter with a Split CT (clamp-on) sensor, designed for precise monitoring of electricity consumption in homes, solar panel installations or technical rooms. It allows installation without direct contact with live wires, offering extra safety and ease of installation. It includes a 50A CT current transformer, with support for models of up to 100A.
Complete energy monitoring
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Measures voltage, current and power in real time
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Ideal for monitoring appliances, circuits or entire rooms
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Perfect for solar panels – you can track the energy generated in real time
Split CT sensor – no direct contact with the wires
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Easy to install, by opening and closing the side clamp
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No disconnection from the mains, no risk of electric shock
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Supports currents of up to 100A ( 50A transformer included)
Consumption history and analysis
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Saves data automatically, even in the event of a power cut
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Storage of up to 6 months in the eWeLink app
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Quick export in .CSV format for analysis and reporting
Protection through notifications and automatic shut-off
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You can set voltage, current or power thresholds
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The device automatically switches off the load if the set values are exceeded
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Receive real-time notifications when consumption goes over the desired limits
Load control via an external contactor
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Includes a relay with a 2A output (dry contact)
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Can drive an external contactor to switch high-power loads on/off
Tested for industrial safety
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Certified resistance to:
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Lightning and surges
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Short circuit
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Drops and vibration
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Corrosion (salt spray)
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Extreme temperatures
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Flame-retardant housing, robust construction – designed for intensive, safe use
Practical use cases
- Installed on the circuit of an air conditioner or a water heater, it monitors energy consumption in real time and sends alerts on abnormal values.
- Used to identify the appliances that use the most electricity in the home and reduce the energy bill.
- Integrated into an automation that automatically switches off an appliance if it exceeds a consumption threshold, preventing faults.
Technical specifications:
| Model | Sonoff POWCT |
| Power supply | 100–240V AC, 50/60Hz, 2W |
| Measurements | Voltage, current, active power |
| Sensor included | CT Split Core 50A (supports up to 100A), current measurement range 0-100A |
| Maximum cable diameter | 15 mm |
| Load control | Internal 2A relay (dry contact) for an external contactor |
| Data storage | 6 months, .CSV export |
| Connectivity | WiFi 2.4 GHz, IEEE 802.11 b/g/n |
| Compatibility | eWeLink App (Android/iOS), Amazon Alexa, Google Home; Matter (e.g. Apple Home, Home Assistant) only via the software Matter bridge in eWeLink CUBE |
| Operating temperature | -40C ~ 50C, 5-95% RH non-condensing |
| Housing material | Flame-retardant PC V0 |
| Safety | Shock, surge, drop and harsh environment tests |
| Mounting | In an electrical panel |
Monitor, protect and control electricity consumption with Sonoff POWCT – the professional energy management solution: safe, precise and fully automatable!
POWCT is the right choice for anyone who wants to monitor and control the electricity consumption of equipment at home or in a business.