The cFos Power Brain Controller is a controller for installation in a wall box for charging electric cars according to IEC 62196 (Type 2). For this purpose, the cFos Power Brain Controller monitors the "Charge Pilot" (CP) and "Proximity Pilot" (PP) signals of the connection cable to the wallbox. A resistance in the cable signals via PP the maximum charging current for which the cable is designed. CP is used to detect the car, monitor short circuits and signal the maximum charging current using PWM.
The cFos Power Brain Controller has the following components:
The heart of the cFos Power Brain Controller is an ESP32 from Espressif Systems. With the help of this powerful microcontroller, the cFos Power Brain Controller can speak the following communication protocols:
You can therefore use cFos Power Brain Controller to build a EVSE that speaks OCPP and Modbus at the same time and can also be controlled via an HTTP API. Such EVSEs can then be easily networked via WiFi
The cFos Power Brain Controller can read meters via Modbus, eg the ABB B23 112-100 (but also others according to your wishes) or up to two S0 meters via the S0 inputs. This means that the Wallbox can be inexpensively equipped with an intermediate meter for billing purposes and at the same time optionally read other meters from consumers or producers (solar system).
Of course our own EVSE uses the cFos Power Brain Controller.
(1) Only for devices supported by the cFos Power Brain Controller, ie only for controllers installed in large numbers in EVSEs from OEM partners. Only the scope of equipment described there applies tothe cFos Power Brain Wallbox.
(2) The inputs can be controlled potential-free. Voltage from approx. 3.3V to 24V. The cFos Power Brain Controller can optionally supply 12V voltage.
Parking garage for apartment buildings and condominiums
Apartment building with 13 parties and underground car park
cFos Charging Manager at the Smart Meter Gateway
Billing and use of calibrated meters
Operate Raspberry Pi with Huawei LTE stick/router
Set up a charging park and solar excess with the help of a Raspberry Pi
Instructions for Modbus cabling (PDF)
cFos Charging Manager App - Download and functions
Instructions for installing the cFos Charging Manager on a Raspberry Pi
What's new in the current version of the cFos Charging Manager?
Check yourself if the cFos Charging Manager is compatible with your inverter.
RFID and PIN functions
Clever charging functions
Formulas for counters and charging rules
OCPP configuration for cFos Charging Manager, cFos Power Brain Controller and the cFos Power Brain Wallbox
Operate cFos Charging Manager with Volkszähler/vzlogger
cFos Power Brain Controller with Modbus counter or S0 counter