That's an interesting change in metering and billing. I'm not surprised, and I don't think anyone should be.
All of that makes a lot of sense, except for the 0-10V signal requirement. I understand that's what you can readily produce from an analog output port of the PLC, but it is a technically obsolete approach; industrial applications started replacing this sort of analog signal with digital communications (typically some sort of FieldBus) decades ago. Are you open to the possibility of CAN (Controller Area Network) or another form of digital communications?I want to build a power management system by means of a PLC, with following inputs:
• consumed power i3
• consumed power E-up
• consumed power rest of the house (appliances, heat-pump, lighting, etc.)
• produced PV-power
and an output (0-10V) to be used for
• controlling the charging power of the cars (only one car is (nowadays)/ will (in the future) being charged at the same time)
So for this I will need a charger from which the charging power can be controlled by means of a 0-10V input signal.
The chargers that we are using now have a maximum power of 2.3 kW (10 Amps at 230 V). Which is fine for us.
Does anyone know of a charger that I could build, using this 0-10V input signal for powercontrol?