Solar PV Monitoring/Automation Thread

graememk

Whats the options for a solis hybrid inverter with the latest dongle to get data into home assistant?

mjatkey

https://www.boards.ie/discussion/comment/123192373#Comment_123192373

Solis api/cloud integration or the Solis modbus which drops the cloud piece unless you do the local rs485 work around.

The cloud one now offers the inverter control which works well.

mjatkey

https://www.boards.ie/discussion/comment/123145119#Comment_123145119

Yeah, got an esp32 all set up and working well with the Seplos BMS, gives me a good enough view of what is going on with the Seplos and the WECO's now.

As for the Shelly, flashed it with Tamasto then tried flashing ESP32 ota but currently won't upload from HA to the device although it is pingable, tried flashing it through usb but ended up distroying the board so thats work in progress.

mjatkey

Guys, looking for help.

I got hold of a Huawei R4850G2, I have the power adaptor and CAN adaptor and have it set up and working..ish.

I can vary the voltage no problem but all I can get it to output amps wise is 5A.

Below are the "frames" I have been sending to it, voltage changes work fine.

I can0 108180FE [8] 01 00 00 00 00 00 E9 16 58.1V not fixed

can0 108180FE [8] 01 00 00 00 00 00 D5 2A 53.1V not fixed

can0 108180FE [8] 01 01 00 00 00 00 E9 16 58.1V fixed

can0 108180FE [8] 01 01 00 00 00 00 D5 2A 53.1V fixed

can0 108180FE [8] 01 01 00 00 00 00 E4 00 57.00V fixed

can0 108180FE [8] 01 00 00 00 00 00 E4 00 57.00V not fixed 1024

can0 108180FE [8] 01 00 00 00 00 00 E3 1C 57.00v not fixed 1020

can0 108180FE [8] 01 04 00 00 00 00 00 32 50 Amp fixed?

can0 108180FE [8] 01 04 00 00 00 00 C8 00 50 Amp fixed (1024)

can0 108180FE [8] 01 04 00 00 00 00 C7 38 50 Amp fixed (1020)

I have downloaded the USBCAN software, which seems to work fine. (not sure what everything means or does?)

Found a lot of info online about the Huawei rectifiers but what ever way I am doing it the output current stays fixed.

I know its only 5amp as I have it temporarily connected to just the Seplos battery and the BMS studio is showing the current going in.

I have a few bits ordered ESP32 and VP230 so am hoping to integrate it into HA which again hopefully will make it easier to view and make changes.

Any pointers as to what I am doing wrong currently would be appreciated.

Thanks

mjatkey

Guys, HA question, adding another Dell Wyse in another location, should I build a fresh HA install and add the integrations, addons etc or could I use a back up from an existing install and just remove the bits I don't need, change the static IP and ducknds? Also does anyone know if you can run integrations on both HA install at same time ie Solis (API) Tyua etc, or would it depend on the integration? Thanks

10-10-20

https://www.boards.ie/discussion/comment/123360864#Comment_123360864

Another location and new instance of HA to monitor the same devices, or is this an instance for another location and different sensors entirely?

mjatkey

https://www.boards.ie/discussion/comment/123361042#Comment_123361042

Bit of both, essentially I want to be able to monitor a Seplos battery hanging off a Solis in an apartment, I figured it was easier and probably no dearer to buy the Dell (£25) then use an ESP32 running the BLE battery management integration then trying to get remote access to the ESP32 (I know it can be done) but the video on YouTube was an hour and a half with god knows how many twists and turns the HA route seemed a lot simpler. (Apart from the last 5 days trying to get HA on the Wyse 3040) but thats another story.

10-10-20

https://www.boards.ie/discussion/comment/123361087#Comment_123361087

Ok… still not entirely sure what you're up to, but essentially if you restore the instance onto a new HA then it will start looking to connect to each of your devices to pull the status. In my case it would not work for my z-wave or zigbee devices as the second instance wouldn't have access to the USB dongles, but also Shelly devices as they need to be configured with a single endpoint server (no option for two).

So I'd say to just go with a new fresh instance from scratch.

mjatkey

https://www.boards.ie/discussion/comment/123361119#Comment_123361119

Yeah, I think you are right as I don't have any where near as much memory on this one so the less "stuff" is on it the better. Thanks

mjatkey

Guys,

Has anyone tried building a DC current/voltage monitor for integration into HA using the below items?

If so did it work?

Only I'm just looking at a cheaper/simpler alternative to the likes of a Victron shunt.

Currently I'm using a separate rectifier as well as the inverter to get the batteries to 100% soc during the 4 hour EV window. I was looking at using a shunt but as I have two separate charge sources I figured I'll need two devices to measure total energy going in to the batteries which gets expensive for very little extra info/control that I don't already have.

I also like the idea of not adding addition hardware, and just passing the DC cables through the ct.

ChatGPT can supply the yaml for HA, but was looking for a steer as to whether it works/worth it, I have a few ESP32's spare and the QNHCK's don't look expensive.

Thanks

graememk

https://www.boards.ie/discussion/comment/123758978#Comment_123758978

A traditional CT can't measure DC current.

Hall effect sensors that can read dc currents.

Edit it is a hall effect sensor. Not a CT

Edit 2: you'd need to use some sort of voltage divider to keep the input below 3.3v on the esp32

mjatkey

https://www.boards.ie/discussion/comment/123759016#Comment_123759016

Thanks graememk, yeah Chat has that covered, just wondered if anyone had tried one and did it work?

⚡ Option 2: Measured Voltage (dynamic)

If your DC bus varies (e.g., solar, batteries), you can also add a voltage divider into another ESP32 ADC pin. Example for 0–60 V bus → scaled to 0–3.3 V input:

10-10-20

https://www.boards.ie/discussion/comment/123759098#Comment_123759098

How are you planning on creating a voltage-drop on the battery cable without adding in a resistance, or are you going to use the cable as the resistance?

For the voltage I haven't done it but I don't like using voltage divider on such a high input voltage for a number of reasons. But it can be done.

https://forum.arduino.cc/t/measuring-up-to-50v-dc-using-arduino-and-a-voltage-sensor/1245052/10

https://ohmslawcalculator.com/voltage-divider-calculator

If you do it in ESPHOME then you can map the ADC input voltage to the measured voltage using a linear mapping (calibrate_linear).

https://esphome.io/components/sensor/#calibrate_linear

mjatkey

https://www.boards.ie/discussion/comment/123759248#Comment_123759248

Thanks 10-10-20, to be honest I've not really looked any further than what is a cheap, simple alternative to a Victron shunt.

Then threw it into ChatGPT to see what it could do in terms of configuration into HA, wiring etc.

Food for thought.

10-10-20

https://www.boards.ie/discussion/comment/123759561#Comment_123759561

It's technically challenging alright, but that's not to say that it can't be done at a DIY level.

graememk

https://www.boards.ie/discussion/comment/123759561#Comment_123759561

Ask it to do it with a shunt resistor

I'm using one like this with my zeva https://amzn.eu/d/6apteHO

Must check the code on the zeva but it's a proportional calculation on the voltage drop across the shunt

bullit_dodger

Hi guys - buddy of mine (also a software engineer) recently got a Solid Hybrid installed. What's the best route to getting this into HA. He was saying that the android phone app is 5 min update frequency. I've a GivEnergy solution myself and there's a REST Api for it - I'm hoping that there's a similar story for Solis?

Do you need any hardware, or is it just open a ticket with Solis to enable your account and get a API token?

Thanks folks.

10-10-20

https://www.boards.ie/discussion/comment/123795591#Comment_123795591

Modbus!

https://github.com/Pho3niX90/solis_modbus

championc

For anyone with an upcoming install, consider asking your installer specifically for the Solis S6 (which replaces the S5). It looks like a rebadged Deye, which therefore allows local access to data from the inverter

graememk

https://www.boards.ie/discussion/comment/123795883#Comment_123795883

It's similar, but very unlikely to be a rebadge

oaklands

https://www.boards.ie/discussion/comment/123795883#Comment_123795883

also check the battery Voltage range + charge/discharge amps or even better read the datasheet in detail.

(EDIT) Reason: They have a lot of different spec inverters. I think the one being referred to is S6-EH1P(3-8)K-L-PLUS. The specs look very similar to the Sunsynk/Deye equivalents.

graememk

https://www.boards.ie/discussion/comment/123795991#Comment_123795991

Looked at the manual it's very similar.

Totally different screen but internal hardware is very similar, (even the 500v max input voltage)