Ep04 DC solar monitor - Upgrade to closed loop!
Ғылым және технология
If you have a hybrid inverter you will be familiar with the problem of not being able to see the kW readings for the DC battery and the DC panels on the Myenergi app.
Well, not anymore! In this video series I'll take you on the long journey I went through to solve the problem, or at least have a pretty good indication of what is going on behind the inverter. Be warned this has taken several months so the video is split into many parts as I went down lots of blind alleys!
In this video we will go into more detail about how it works and talk about the improvements!
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Some notes:
If you have an AC coupled battery (Libbi) this can be read directly with an AC CT into the Harvi. Job done.
Back to a hybrid inverter - with a DC batt + DC panels you could also hook up the RS485 into Home Assistant software on a Raspberry Pi and get the readings that way.
But I wanted them on my Myenergi App on my phone . . . so here we are!
Пікірлер: 5
Hi, nice one getting this all to work. I'm quite interested in the Harvi interaction part. I'm just about able follow what you're doing at 14:00 Would you be open to sharing the PCB schematic at all / at least for that side?
@peterthefoxx
18 күн бұрын
Ah nvm, I think I get it now. If you had a 9V ac/ac adaptor it would essentially be an LDR in series from the adaptor going to the Harvi I think. Suppose it’s possible the resistor divider is also helping in some other way - sounded like it was very sensitive to alterations here.
@routercnc9517
17 күн бұрын
Essentially yes. The resistor divider was needed to drop the AC voltage to a level the Harvi needed. They were 1 Watt because they needed to allow enough current to flow as that is what the Harvi needs to sense. They get warm but not hot.
@routercnc9517
17 күн бұрын
I couldn’t find an AC /AC adapter which output a low enough voltage. Otherwise they would not be required.
@peterthefoxx
17 күн бұрын
@@routercnc9517 Thank you for the elaboration, I’ll do some experimentation!