cFos Charging Controller with S0 meter

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 for measuring the household consumption to S0 meter input 1 and an S0 meter for measuring the solar output 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.

1. Logging of the charged kWh

Img cFos Charging Controller with S0 meter

Please ask your electrician to install the S0 meter in the electrical distribution into the supply lines for the cFos Charging Controller. You must have a twisted two-wire connection wired from the S0 meter to connector S0-1 of the cFos Charging Controller.

Activate the S0 meter in the cFos Charging Controller configuration and set the number of pulses per kWh if necessary.

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

Add a cFos Charging Controller meter as a meter.
Device Type: cFos Charging Controller
Address: localhost:4701
ID: 1
Enabled: an
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

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

Please ask your electrician to install the S0 meter behind your energy supplier's meter in such a way that it only measures the electricity consumption in your house - without that of the cFos Charging Controller. You must have a twisted two-wire connection wired from the S0 meter to the S0-1 connector of the cFos Charging Controller.

Activate "Load Balancing" in the cFos Charging Controller configuration.

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

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

Enter your house connection capacity under "Max. Total Power". As "Power Reserve" you should definitely enter 5000 (5kW) 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 Charging Controller meter as meter.
Device Type: cFos Charging Controller
Address: localhost:4701
ID: 1
Enabled: an
Role: Consumption

Save all settings. From now on, the Charging Manager integrated into the cFos Charging Controller will reduce your car's charging capacity if your household consumption increases for a short time, e.g. when using a flow heater. As soon as consumption has dropped again, the car will have full charging power available again.

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

3. Charging only if the solar system supplies sufficient power

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 producing. You must have a twisted two-wire connection wired from the S0 meter to the S0-1 connector of the cFos Charging Controller.

Activate "Load Balancing" in the cFos Charging Controller configuration.

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 (5kW) 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, enter the desired output of the solar system from which the car is to be charged as the Starting Power Limit. Under "Power" enter the desired charging power for the car. You do not have to select the total solar power if you want to operate other devices with the solar system. For example, select "Absolute" if you want to set the charge power as an absolute wattage.

Save the cFos Charging Controller settings.

Add a cFos Charging Controller counter as meter (counter).
Device Type: cFos Charging Controller
Address: localhost:4702
ID: 2
Enabled: an
Role: Production

Save the settings of the meter and the house service connection. From now on the Charging Manager allocates the portion of solar power you have selected to the car for charging.