cFos Charging Controller with S0 meter

Possible uses for the S0 meter

1. Logging of the charged kWh

Img cFos Charging Controller with S0 meter Img cFos Charging Controller with S0 meter

Ask your electrician to install the S0 meter in the electrical distribution in the supply lines for the cFos Power Brain Controller. You have to wire a twisted two-wire connection from the S0 meter to the "S0-1" connection of the cFos Power Brain Controller.

Activate the S0 meter in the cFos Power Brain configuration and, if necessary, set the number of pulses per kWh.

In the dialog "Configuration" you need the following settings:

Add a "cFos Power Brain " type counter as the meter.
Device Type: cFos Power Brain
Address: localhost: 4701
ID: 1
Enabled: on
Role: display

From now on, your cFos Charging Controller counts the energy charged to the car.

2. Dynamic Charge Current Control with Consideration of Home Consumption

Img cFos Charging Controller with S0 meter Img cFos Charging Controller with S0 meter

Unique selling point: we know of no other EVSE that can do this.

Ask your electrician to install the S0 meter behind the meter of your energy supplier in such a way that he only measures the electricity consumption in your house - without that of the cFos Power Brain Wallbox. You have to wire a twisted two-wire connection from the S0 meter to the "S0-1" connection of the cFos Power Brain Controller.

Activate "Load Balancing" in the configuration of the cFos Power Brain.

For the S0 inputs, you can also set how many pulses per kWh your S0 meter outputs in this dialog. 1000 pulses per kWh are typical.

In the dialogue "Configuration" you need the following settings:

Enter your house connection power under "Max. Total Power". As "Power Reserve" you should definitely enter 5000 (5 kW) as control reserve, because individual phases could be loaded differently.

Add the cFos Charging Controller as EVSE (wallbox).
Device Type: cFos Charging Controller
Address: localhost:4701
ID: 1
Enabled: an
Max Power: 11kW
Priority: 0
Phase Rotation: 0

Add a "cFos Power Brain " counter as the meter.
Device Type: cFos Power Brain
Address: localhost: 4701
ID: 1
Enabled: on
Role: Consumption

Save all settings. From now on, the charging manager integrated in the cFos Power Brain Controller will reduce the charging power of your car if the house consumption increases for a short time, e.g. by using a water heater. As soon as consumption has dropped again, the car has full charging power available again.

If you later add a second (supported) wallbox, the Charging Manager can distribute the available power to both wallboxes.

3. Charge only when the solar system supplies enough electricity

Img cFos Charging Controller with S0 meter Img cFos Charging Controller with S0 meter

If the Charging Manager cannot read the inverters of your solar system, ask your electrician to install the S0 meter behind the inverter of your solar system so that it measures how much power the solar system is currently generating. You have to wire a twisted two-wire connection from the S0 meter to the "S0-1" connection of the cFos Power Brain Controller.

Activate "Load Balancing" in the configuration of the cFos Power Brain.

You need the following settings in the "Configuration" dialog:

Enter your house connection power under "Max. Total Power". As "Power Reserve" you should definitely enter 5000 (5 kW) as control reserve, because individual phases could be loaded differently.

Add the cFos Charging Controller as EVSE (wallbox).
Device Type: cFos Charging Controller
Address: localhost:4701
ID: 1
Enabled: an
Max Power: 11kW
Priority: 0
Phase Rotation: 0

Click "Add Rule" to add a loading rule. Select "Solar" as the rule type and enter the desired output of the solar system as the "Starting Power Limit" from which the car should be charged. Enter the desired charging power for the car under "Power". You do not have to select the entire solar output if you want to operate other devices with the solar system. For example, select "Absolute" if the charging power should be set as an absolute wattage.

Save the cFos Charging Controller settings.

Add a "cFos Power Brain " type counter as the meter.
Device Type: cFos Power Brain
Address: localhost: 4702
ID: 2
Enabled: on
Role: Production

Save the settings of the meter and the house connection load. From now on, the Charging Manager will allocate the proportion of solar power you have selected to the car for charging.

Notes

Some S0 counters have a semiconductor pulse output. If you do not register pulses, you must swap the lines at the S0 input.

You can also combine both variants: Connect an S0 meter to measure house consumption to S0 meter input 1 and an S0 meter to measure solar power to S0 meter input 2.

In these examples, we operate the cFos Charging Controller as a Modbus TCP device. localhost:4701 is the EVSE, localhost:4702 the S0 counter input 1 and localhost:4703 the S0 counter input 2.
The EVSE has slave ID 1, the S0 counter input 1 has ID 2 and the S0 counter input 2 has ID 3.

Take care not to overload the S0 intermediate counters and make sure that the maximum capacity of the counter according to the data sheet is not exceeded.