Hi Cab123, great going, looks like you have created in NodeRed an equivalent to the Smart EVSE.
Responding to the post above from Glyn, attached is a photo of my final setup. I run two NodeRed programs, and decided to arrange a physical switch between the two so that I do not have to go into a computer to select which one to use. The two programs are connected to the EVSE via two emonPi UART boards, with a select switch to choose either output.
One program is designed to use the maximum possible charging rate available, which is limited to 49A (11kW) due to wiring limitations. I find that when I charge at the maximum rate overnight to utilise my off peak power rate, this maximum charge rate is nearly always available even if we are running an aircon unit. At other times it acts like your NodeRed solution, reducing and increasing the charge rate to provide a stable 55A draw from the grid. Like yourself I decided to create some headroom - in my case, 8A, or 2kW, under the 63A maximum possible. I can completely recharge the battery from a depleted state to the full 90kWh range charge overnight.
The second program utilises the same Smart EVSE algorithms to follow the solar output and maximise the charge rate to use all available solar energy. Below is the emonPi Solar graphic from 3 November showing a days charging (8:10am to 4:30pm) using only solar power. The ability of the Smart EVSE to respond to changes initiated by emonPi via NodeRed is clearly shown. The response to a few morning clouds, when the charge rate is kept at a minimum to prevent tripping, is clearly seen. Also visible at midday is the effect of turning on a twin boiler espresso coffee machine. The two thermostats cutting in and out are clearly visible between 12:30 and 1pm, as are other domestic machines being used during the day that create initial spikes that are quickly brought under control by the Smart EVSE and the emonPi serial feedback connection.
On this day, I achieved 33.06kWh charge to the EV, which equated to a gain of 157kms. Between 9am and 4pm, the energy to the car was 29.1kWh, and during this period I sold 547W to the grid. Smart EVSE was therefore able to ensure utilisation of 98% of the solar output.
Regards