
MARSTEK CT003
Smart energy meter for P1 and IR connection





Vendor:MARSTEK
Please note: the Marstek CT003 does not come with a USB-C power adapter. Any standard 5V USB-C adapter is suitable for powering the meter.
The Marstek CT003 Smart Meter is the latest generation smart energy meter that reads your energy consumption and solar energy production in real time. Thanks to support for P1, infrared (IR), and TIC communication, the CT003 is compatible with a large number of smart meters. The measured data is wirelessly transmitted to your Marstek home battery, so that excess solar power is automatically stored instead of being fed back into the grid. Through the Marstek app, you also always have direct insight into your energy consumption and battery performance.
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Free and fast delivery in the Netherlands.
Expert support before and after purchase.

Marstek CT003 Smart Meter – P1 Meter

Smart energy meter for P1 and IR connection

The CT003 continuously reads your smart meter and provides your home battery with real-time measurement data. This allows the system to react more quickly to household consumption and utilize available energy more efficiently.

Based on actual consumption, the CT003 helps to align the charging and discharging behaviour of your Marstek battery. This way you use less unnecessary grid power and your energy management remains clearer.

When more solar energy is available than you are directly consuming, the CT003 can transfer this to the battery system. The battery stores the energy for later use, allowing you to get more out of your own installation.

Via the Marstek app, you can view current measurement data and graphs of your energy consumption. This makes it easier to recognise patterns and better align your battery usage with your household needs.

The CT003 supports WLAN and Bluetooth connectivity. Where additional range is desirable, the connection can be strengthened with an external antenna.
You can connect the CT003 via the P1 port or via infrared. Both connection methods are designed for easy installation, allowing the meter to quickly work with your Marstek system.




The CT003 comes with a 10-year Marstek warranty. Combined with technical support, this provides extra peace of mind in everyday use.
Yes. The CT003 is intended for use with compatible MARSTEK VENUS, JUPITER and SATURN systems. The meter provides real-time measurement data to the storage system, allowing charging and discharging to be better aligned with actual consumption.
First connect the CT003 to your smart meter via P1 or infrared. Then open the MARSTEK app, go to the settings of your energy storage system, and select the CT003 as the measuring device. After configuration, the measurement data will be sent to the battery system.
In most situations, installation is straightforward with the manual. Use the P1 port or infrared as per the instructions. If you are unsure about your meter cupboard or get stuck during configuration, please contact support.
The CT003 comes with a 10-year warranty. Please keep your proof of purchase safe. In the event of a potential quality issue, our after-sales service can assess whether repair or replacement is applicable.
Yes. Firmware updates may become available via the MARSTEK app. Follow the steps in the app when an update is offered. If you do not receive a notification but expect an update, please contact our after-sales service.
Before purchasing, check if your smart meter is on the compatibility list. You can consult the MARSTEK CT003 compatibility list for this.
The CT003 uses measurement data to enable product operation and power control. According to Marstek Energy's privacy policy, data is not used for unauthorized purposes. For privacy questions, please contact customer service.