question

Hi @avukat38

Not sure how to write this in the supported DESS/ie integrating next day forecast/pricing however to achieve the more simple version of what you're looking for in node red would be something like this:

If using old venus os you need to pass data into this function (but first set topics of msg based on which data node is used). If not you can probably read vars from global context

This function will calculate grid setpoint to be the total of solar - loads. And then export the excess above 0. You might want to add more safety mechanisms for event where data nodes go offline before issuing 0W.

//if you're using old venus os you need the below. if not you can just read these varibales from the global context
var acLoad = global.get('acLoad');
var acSolar = global.get('acSolar');
var dcSolar = global.get('dcSolar');
var gridSetpoint = global.get('gridSetpoint');
var exported= global.get('exported');
 
//setting soc variable depending on inputs from flows
if (msg.topic === "acLoad") {
  soc = msg.payload; // Extract payload from input 1
  global.set('acLoad', acLoad);
}
 
//setting soc variable depending on inputs from flows
if (msg.topic === "exported") {
  exported = msg.payload; // Extract payload from input 1
  global.set('exported', exported);
}
if (msg.topic === "acSolar") {
  acSolar = msg.payload; // Extract payload from input 2
  global.set('acSolar', acSolar);
}
 
if (msg.topic === "dcSolar") {
  dcSolar = msg.payload; // Extract payload from input 3
  global.set('dcSolar', dcSolar);
}
 
//this is used to check if gridsetpoint is already 0, if it is then we won't bother updating it.
if (msg.topic === "gridSetpoint") {
  gridSetpoint = msg.payload;
  global.set('gridSetpoint', gridSetpoint);
}
 
if (msg.topic === "acLoad") {
 
  acLoad = msg.payload; // Extract payload from input 2
 
  global.set('acLoad ', acLoad);
 
}



 
//The main logic. 
if (export < 10000) { 

    gridSetpoint = acLoads - acSolar + dcSolar;

} else {
  gridSetpoint = 0;
}
 
if (gridSetpoint !== global.get('gridSetpoint')) { // Check if gridSetpoint is going to change
  global.set('gridSetpoint', Math.min(gridSetpoint, 0));
  msg.payload = Math.min(gridSetpoint, 0);
  return msg;
}

First of all, thank you, I am using Venus 3.30, my buying and selling price is fixed. Does not change according to time and date

Unfortunately, I have no knowledge of what you are talking about. You need to explain how to do it and how to add it to the system as if you were explaining it to an idiot.

I would be very grateful if you write. I think I explained exactly what I wanted

Im not yet familiar with DESS but you can use ESS with scheduled charging

If DESS has scheduled charging then maybe you can combine them