question

Ah, that makes sense. I can work around that by recording the highest value periodically throughout the day and then using that. I can then reset that to 0 after I've used it at 11:45PM.

Thanks for the quick response.

John

This has also caught me out, I'm using the values in Home Assistant, just assumed they'd reset at midnight. I'll build something into the flow to change the value I send, but that's a job for tomorrow.

I guess I'd better store and use the highest value until midnight, then reset to 0 until a suitable time.

I wrote some Node Red to manage the value, keep the highest value (in case it reset before midnight), and then reset it to zero at midnight.

I was curious so also wrote a little Node Red to capture the time they actually reset.

One reset at 1:11am, and the other at 2:17am, these are two identical sized arrays, one east facing the other west facing, not sure what triggers them to shut down, the voltages both looked pretty similar so would have expected the same sort of reset time, but its irrelevant so doesn't matter.

I got a response from Victron about this. They don't have internal clocks so they just reset to zero a fixed time after solar production ends. I think the logic I used in NodeRed was to use a local KWh variable that takes the highest value reported by the system but ignores the hours between midnight and 4am. I also reset my variable at midnight.

@Semlohnhoj Thats basically what I've done, but also need to account for the possibility in winter when its dark by 5pm that it may reset before midnight.

This is what I used.

var Var1 = Number((msg.payload).toFixed(2));
var Yield = flow.get("MPPT-1-Yield");
var d=new Date();
var hours=d.getHours()

// mppt yield does not reset at midnight - the time varies - see comments

//if the hours are less than 3 then use 0
//If the hours are less than 16 then use current yield
//if the hours are greater than 16, but Yield = zero use previous yield value

msg.payload = (hours<3 ? 0:(hours < 16 ? Var1 : ((Var1 == 0 ? Yield : Var1))));

flow.set("MPPT-1-Yield",msg.payload);

return msg