Sc00bs

@chunks , so the exporting of power has stopped. I am assuming that the installer changed the CT's as they were onsite and the feed back into the grid stopped. The inverters is however pulling power from the grid when it is not necessary. Yesterday for example, the batteries were @100% by 13:00 and PV production is throttled bac, there is still however a 500W load on the grid and that increases to 3.6kw @13:25 pretty much in time with the load increasing. Installer has said he thinks that there is some lightning damage and that the inverters need to be sent back to Sunsynk for repair. Just to confirm, there are 2 x 12kw Sunsynk inverters, wondering if this could could still be the Ct clamp issue.

Hi @SunsynkDongler When I am trying to work out complicated automations I have taken to Chatgpt for alternate ways to do things, I am no code junkie and getting Chatgpt to write the code for me is way easier than trying to work it out myself. Main thing I have found is that working on the Chatgpt prompt to give it as much information about what it is you want to do as possible and the outcome you want at the end of the whole thing. Then double check that it works properly as it sometime assumes things. Really is a life saver with automations though.

Looks like they have a shop which is a good sign

I have a 16kw Deye @Deondti , absolutely love it, the thing is a beast. Agree 100% with Sidewinder, the dongle from smarthomeintegrations is the way to go. You can either use the one without his firmware and load firmware on using Slipx06's ESPhome code. Or you can use his one with his firmware on it which is a bit easier to setup, I made video's on both options some time ago. Either way much easier than trying to go down the RS485 board method which is notoriously more difficult to get working.

Thanks for that @Chunks appreciate it 🙂 I will speak to their installer and suggest that they check that they have the phases setup correctly.

Sunsynk updated the firmware but still feeding back into the grid. Is now coming up with a F41 and W31 Parallel comms issues, they have spoken to the installer and they are going to come and sort it out. Looks like it has been an issue since the site was installed as they have been feeding back into the grid for the last 18 months. The comms between the inverters was not working properly before the update but it wasn't reporting any errors as you could change work mode settings on one inverter and it did not update the settings on the slave.

The RSD usually (11,12) depending on the model inverter, provides 12Vdc output when the inverter is on Just make sure you get the polarity correct otherwise you will blow your shield up as they do not have polarity protection.

Strange power flows

Have been speaking to Sunsynk and getting the firmware upgraded, apparently that may be the problem.

Hi Guys I am trying to help one of my neighbors with their inverter settings and I have noticed that they appear to be exporting power to the grid Sunsynk 12kw 3-phase inverters x 2 If I go onto the Sunsynk Website to Grid I see the following That looks like they are exporting 4kwh of power on that day. It looks like it is probably happening when their battery is full I have checked their system mode settings and they appear to be set correctly So, my questions are: 1. Am I reading correctly that their inverters are feeding back into the grid for some reason. 2. If so, how do we stop it from doing that as it looks like the settings are set correctly for 0 feedback into the grid. Any ideas?

Nice Dashboard, well done 🙂

If you are getting close to the limits on the 8Kw Inverter. My suggestion would be have a look at adding a Grid-Tie inverter on the Aux Port. My understanding is that you can add up to a 4kw Grid Tie, so you can add another 2 x mppt controllers relatively cheaply and it also increases the max load on the inverter without going to the grid. One of my friends has this setup and he said that he regularly goes up to 9kw load when his grid tie is producing power without pulling any power from the grid. Seems like a good option if you are borderline on your 8kw as you can pick up a grid tie pretty cheap second hand off FB Marketplace

Interesting @TaliaB I looked through some of my old data and found more more the 9kw on my Sunsynk 8kw (12,7kw of panels) a number of times, the highest production readings were during spikes.

I would strongly recommend getting one of the ESP32 & RS485 Shields from smarthomeintegrations, no soldering involved and is way easier to set up. You can get it to work using one of the boards but there are so many things that can cause issues it is just no worth all the stress it is not expensive. I did a video on my channel on how to set it up.

You can split the port on the inverter. Check out this thread

The big thing is that they can write of 125% of the cost of the system to tax. Is a no brainer for companies to get off the grid as it doesn't cost them anything, only till 28 Feb 2025. "Business incentive For businesses, a 125% tax incentive applies in terms of section 12B of the Income Tax Act – for new and unused energy assets such as wind, solar PV, concentrated solar, hydropower and biomass. Businesses get an upfront, higher-than-cost deduction of 125% as opposed to the current incentive, which is claimed over three years – 50% of the cost in the first year, 30% in the second and 20% in the last."

Easiest is to split the RS485/Modbus port using a double ethernet wall mount box with a cable from the inverter to the box splitting out the cables as shown below to each of the plugs and you can then plug your battery into one plug and the ESp32 into the other.

I have found the website at https://pvwatts.nrel.gov/ to be very useful in the past for getting an indication of monthly solar production from your panels. You need to capture your address, inverters max solar array production, solar array size, the heading/direction it is facing in degrees and the angle it is at from horizontal. The site will give you an estimation for the monthly production for your panels. It is very interesting to see the difference the inclination angle makes to the monthly production numbers. 5Kw 0° Facing Panels @ 5° inclination 5Kw 0° Facing Panels @ 30° inclination

Easiest is to buy a mesh system, makes life much easier.

Glad you worked it out 🙂

Hi @shaun99 Just needs to be able to connect to the wifi and be on the same network as your HAOS server.

Hi @aderrington Happy to help if I can. Where are you located? You have the correct pins in the config selected so it isn't that. Maybe post your YAML file so we can check that. You are using Orange/White & Orange on pins 1 & 2 I assume, a photo of the connector please. Also photo of your inverter internals where you have the cables plugged in. Would try connecting directly to the RS485 port without the splitter cable and see if you have better luck. Why do you have two battery connected to your inverter? Batteries are usually daisy chained together with only one, the master, connected to the inverter?

Yes it will, as long as your battery is above your set minimum soc level it will take power from the battery if the load is higher than you max gen load setting. .

Hi @RobO What does it say on your inverter screen?

The data is available in the Sunsynk/DEYE Modbus queries so don't see any reason why they wouldn't be able to. Otherwise I think that @slipx 's YAML code for ESPHome will probably query your inverter and pull that data as default: