I am controlling the charging of my EV using Node-Red and MQTT. I'm using ESS and regulating the EV's charging current based upon the available solar energy. However I want to override this mode when I need a more rapid charge but I don't want to drain my solar battery. I've tried using the ESS Control node and sending it the Disable Feed-in message but it is not sticky. It switches ESS off but then it immediately switches on again. I've also tried sending a high value to the AC Power L1 Setpoint but again it's not sticky – it momentarily draws a high current from the grid but then immediately switches back to the original setting.
1) Which is the recommended approach to switch off or reduce the inverter feed to the AC input?
2) Why are these nodes not working as expected?