Ivan_E

A massive thanks once again to @slipx who delivered the goods. Now working like a treat. 👍

@p_i Hi Can I confirm you formula is correct please? second = register24%256 minute = (register24-second)/256 I seem to be calculating the minutes using this register24%256 for example Int(5165/256) = 20 However I don't seem to be able to calculate the seocnds correctly.

@p_i Gotcha thanks 😀

@p_i I get the year but I am struggling with the 6147 % 256 = 3 sorry 😳

@p_i So I am trying to get my head around working out the numbers into a readable form, So for example how does 6147 work out to be March 2024? I can see your notes but how does this break down as I am learning as I go? month = register22%256; year = (register22-month)/256+2000;

Hi Shaun, that is the idea to use HA with the help of ESP Home but unfortunately the registers I am looking at are a bit more complex and haven't been covered before as far as I know. I need to work out how to interupt the numbers I get from the register before I can write them back. This is all new to me so it's not exactly second nature.

I too am using Node-Red as HA automatiion is too limited. Let me know how you get on please as this will been good to implement.

In the UK but this forum as been a great help. Currently running a SunSynk 5.5kW inverter and with the outage of SunSynk in the UK over the weekend it messed up the Time Sync on the inverter. So I looked into it and believe there is a way to sync the time with an external source via an ESP32 / RS485 to TTL board. I have found out ModBus registers 022 - 024 see to be labelled as System Time. (ModBus.jpg) I exposed these via the ESP32 board but (HA Entities.jpg) But looking at the numbers in eahch screenshot they make no sense, (Day Hour.jpg \ minute second.jpg and year month.jpg) Anyone know how to convert them to a human readable format and also I assume as they are R/W these can be adjusted on the fly? Maybe someone has some experience with these? Thanks ModBus.jpg HA Entities.jpg Day Hour.jpg minute second.jpg year month.jpg

Thanks Buyeye, I did indeed kick off a 100% charge last night so let's see if the drain is fairly linear. Thanks

Hi All, UK based person here. I have noticed today the SOC on my 3*SunSynk 5.32kWh batteries have jumped from 79% to 99% in the space of 25 minutes. I have no charge timer on and solar is only delivering 1.5kWh of power (Winter in the UK, actually winter pretty much all year round compared to SA 😆). Now I highly suspect they are out of balance as the charge indicator one of the batteries at 30% is 4 indicators and the other 2 are are 3 indicators. So whats the optimum way to balance all the batteries? Force charge to 100% then dicharge to 20% then force charge to 100% again? First picture is the SunSynk app and the 2nd is Home Assistant with direct comms to the inverter.. Regards Ivan

Hi All, Well I have found the issue with my inverter and finally have it working with Home Assistant. If turns out there are 2 * 5.5kW Ecco inverters in the UK. One has the conbined BMS \ CAN port and my 5.5kW inverter has the CAN and RS485 port which are seperate (Ports.jpg) Now on the RS485 port you can not use pins 1 + 2 for RX / TX, you have to use ping 1 and 7. You can see why on this photo when I got a flashlight behind the connection board. (Track.jpg) Once I wired up Orange\White to B- and Brown\White to A+ (rj45.png) and altered the ModBus SN from 0 to 1 (Inverter will require a reboot to get rid of the error) I was able to pull data from it.

Caswell, what is your inverter?, mine is the 5.5kW Ecco and I am based in the UK but I am sure that this inverter doesn't have pin 1 and 2 going anywhere on the CAN \ BMS port only the CAN pins are connected.

Yes region 2. Thanks for the update Gary. SunSynk servers are not stable at the moment from posts on other forums. Appreciate all the hard work you are doing with this product. 👍

Hi all, been using the integration and it's been rock solid, however and this maybe what you were referring to @Gary Waterworth the integration seems to be behind, I am using this in the UK and the clocks have just gone back so not sure if this has any effect? For example here is the website And here is the integration Notice the battery SOC? Regards

Has anyone had this working on a new SunSynk 5.5 Ecco inverter in the UK? Here are the ports on the UK 5.5 Ecco. I've tried the BMS \ CAN connector and RS485 connectors, I am begining to think that the UK versions do not have the correct pin outs on the BMS \ CAN bus and the RS485 port on the inverter may have a different pin out compared to the BMS \ CAN.