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Smart EVSE Sensorbox plus


Sensorbox plus will measure the current (and direction of current flow) on three phases, and will send this data to the SmartEVSE controller.

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The SmartESVE Sensorbox plus has three inputs for CT's (current transformers), a voltage input to determine the direction of current flow. The connection to the SmartEVSE is via a 4-pin plug.

The difference with the Sensorbox v1 is that it is now possible to determine the direction of the current, and thus to charge the car on pure solar power. The Sensorbox plus is compatible with software version 2.10 or higher of the SmartEVSE v2,
and ofcourse the SmartEVSE v3.

Current transformers must be purchased separately, and are of the type SCT-013-000 or SCT-010TL.

The Sensorbox plus has a status LED, which blinks orange when power is taken from the grid, or green when it feeds back to the grid.

Placement of the sensor box
To be able to measure the total current of all devices, the sensor box must be placed near the mains distribution panel.

Clip the CT's around the loose phase wires, try to find out which wire is L1, and connect it to connection 1 of the sensor box.
From the same phase a voltage connection must be made to the MAINS input of the sensorbox.
Then connect the CT's of phase L2, and L3 (if available).

Make a 4 wire connection with the SmartEVSE, using the 4 pin green plug.
Cat5 cable can also be used for this wire. The length of the cable can be up to 100m.

The delivery consists of:

  • Sensorbox plus
  • Power supply cable IEC-320-C7, length 2M


This evaluation kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by Stegen Electronics to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

Sensorbox plus

Specific References


Sensorbox plus manual

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