

Marstek CT002 three-phase smart meter 100A DIN rail with WiFi and Bluetooth
The Marstek CT002 is the smart meter that lets Marstek storage systems read household consumption in real time and adjust battery charging and discharging accordingly. It installs on a DIN rail inside the distribution board and samples power across three phases, but it can also be used on single-phase installations to monitor up to three separate measuring points.
It is the component that enables zero grid feed-in: measuring voltage and current to within 1%, it talks over Wi-Fi or Bluetooth to the Marstek app and to the Venus, Jupiter and Saturn series. The current transformers handle up to 100A per phase. The compact plastic body takes little space in the panel; installation requires a qualified electrician. 10-year warranty.
Key features
Technical specifications
| Feature | Value |
|---|---|
| Product code | CT002 |
| Product type | Three-phase smart meter for Marstek storage systems |
| Voltage measurement (RMS) | 100 to 260V per phase |
| Measurement frequency | 50Hz / 60Hz |
| Voltage measurement accuracy | ±1 % |
| Maximum measurable current (single-phase) | 100A |
| Current measurement accuracy | ±1 % (5 to 100A) |
| Number of phases | Three-phase, also usable on single-phase |
| Measuring points | up to 3 on a single-phase installation |
| WLAN protocol | 802.11 b/g/n (20) |
| Radio band | 2.4 GHz |
| Bluetooth | 5.2 |
| Operating temperature | -20 °C to +40 °C |
| Dimensions | 65.4 × 26.5 × 83 mm |
| Weight | 0.2 kg |
| Enclosure material and colour | Plastic, black |
| Mounting | DIN rail inside the distribution board |
| Compatibility | Marstek Venus, Jupiter and Saturn series |
| Warranty | 10 years |
Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.
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