Sc00bs

I haven't had any issues with my cheap one, I have a spare waveshare RS485-Ethernet converter if you would like to try that. https://www.banggood.com/Waveshare-Two-way-Transparent-Transmission-Serial-Server-RS485-to-Ethernet-Module-RJ45-Network-Port-p-1697682.html

I don't get errors from the Modbus connection in my debug. I get an error from one of the headers, not sure which one it is and haven't spent the time to work which one is causing the issue as yet What platform are you running on? I run mine on a Intel Nuc i5, so have plenty of processor cycles available. I set my sample rate lower so as to keep the size of the Db a bit more manageable.

Here it is, my Grafana skills are still a work in progress 😉 Solar Dashboard-1621372657287.json

Nope, sorry, have you seen the other thread

My serial type is set at "Serial Expert"

Firstly, make sure that you disable the Flows that Bloubul did to write setting back to your inverter otherwise you may end up with your inverter settings being changed. You only want to have the ModbusRead & Inverter monitoring flows enabled. Then I would disable all of the queries being sent except perhaps the SOC query and see if you are getting the data back using the debug option on the SOC. If you are getting the data there then I would check in the InfluxDB to see if the data is being sent there. I created another flow with all of the downloadable variables that I could find, it includes some that were not in Bloubuls flow and have attached it. flows (2).json

100% correct, I wired wires 2&7 to A and both 1&8 into B and it works. Not sure if it is necessary to have both wires connected but I did and it works so not inclined to try the other way 🙂 Good luck, let us know if you get stuck

You can buy the ewelink DIN breakers on Banggood as at half the price (R379 & 2p @ R531 + shipping), they have a 2p version as well, delivery take 1-2weeks on the delivery option and includes taxes etc so no duties to pay. They delivery to your physical address with the courier. https://www.banggood.com/1P-63A-eWelink-Single-Phase-Din-Rail-WIFI-Smart-Switch-Energy-Meter-Leakage-Protection-Remote-Read-KWh-Meter-Wattmeter-Works-with-Alexa-Google-p-1840500.html https://www.banggood.com/2P-63A-eWelink-Single-Phase-Din-Rail-WIFI-Smart-Switch-Energy-Meter-Leakage-Protection-Remote-Read-KWh-Meter-Wattmeter-Works-with-Alexa-Google-p-1840501.html Haven't been able to reflash them as yet with Tasmota, tried with OTA but no success. You can also set the trip amperage at whatever you want and can set it to cut off with low voltage as well.

Thanks guys, that answer my question 🙂

Hi Guys I have a friend with a Sunsynk 8kw Inverter & 5 x US3000 Pylontech batteries that he has linked up using the Canbus connection. He has 3x US2000's that he would like to add to his current stack of batteries Are there any issues with adding them that he should be aware off? I believe that the maximum number of Pylontech batteries in a string you can add is 8, is that a battery communications limit or a power bus bar limit? Specifically concerned with the mixing of battery capacities and the communications but if there is anything else would appreciate advice/comments.

Hi Achmat, Thank you for your comments, I do have batteries and will pull that graph and see what it looks like as well.

So, was looking at my inverters historical data on Solarman and noticed something. I thought that Production + Energy Purchased would = Consumption in the historical data on Solarman. But it doesn't, in this case consumption - 55.1kw/hr, production - 43.9kw/hr and 14.1kw/hr - purchased from the grid. Anyone have any idea what happened to the missing 2.9kw/hr, battery efficiency loss perhaps?

Am using mine with the Tuya plugin for Node Red, they seem to work fine but would have prefered to use Tasmota as well. Too much PT to change everything.

Unfortunately they are not reflashable with Tasmota but have got them working using the Tuya plugin for NodeRed.

Thanks for the great explanation of your solution @EdDee your project answers one of my many solar questions and is something I am going to have to build 🙂

I bought Qualitel plugs yesterday from Builders, seems like they are getting stock in again at the branches, best ius to check on their website. FYI they are exactly the same at the BNETA plugs and even use the same software

BNETA plugs are available @ Builders at the moment @ R350 each, there is however another 15A smart plug also running on the TUYA cloud for R220 each, includes power usage as well and even runs on the BNETA software. https://www.builders.co.za/Electrical/Plugs%2C-Sockets-%26-Switches/Smart-Electrical/SOCKET-SMART-WIFI-3-PIN-103X66X80MM-WHT/

Builders have some Tuya smart switches on Promo at the moment @ R220 each, not a bad price and includes power measurement. https://www.builders.co.za/Electrical/Plugs%2C-Sockets-%26-Switches/Smart-Electrical/SOCKET-SMART-WIFI-3-PIN-103X66X80MM-WHT/

Battery usually uses the Modbus port, RPI/Nuc uses the RS485 port, there is one of each on the inverter. You can also use a RS485 - Ethernet converter and access the Inverter over the network if you don't want to have the RPI next to the inverter or want to run off something else perhaps. Not saying that it is impossible bit nobody has worked out a way of polling the data from the wifi adapter that I have seen. Using the RS485 interface also has the advantage of being able to write data to the inverter to change the mode it is working in etc. Worth having a look at Bloubul7's post and the original poost that started the whole connection to the inverter thing off.

You will need a USB-RS485 adapter and a suitable Raspberry Pi/Intel Nuc or similar to run things on. Node Red, Influx DB & Grafana works very nicely You connect directly from the RPI to the inverter using the RS485 port. Would use the Flows posted by Bloubul7 if you want to be able to change the settings on the inverter or if you just want to monitor, then you can use the flows on my system post that are modified Bloubul7 ones with all the extra stuff removed Is a bit daunting at first but once you have the hang of it is relatively easy to customise to however you want it to look

#Greenman I was looking at the flows from Bloubul7 again yesterday and just need to figure out how it works and you will be able to do exactly what you want. Push a button and your inverter settings change from "Solar mode" to "Loadshedding mode". His flows actually do it automatically when they pick up a loadshedding notification on the Eskom website.

Woohooo, Bloubul7, I have finally worked out how to access your Dashboards in Node Red, they look frikkin awesome!! Everything at the moment in my Dashboards is set to 0. Can I read in the current settings from my Inverter and then save them in one of the Dashboards to be written again at a later stage? I am assuming that that is what the Read button is for, am just a bit nervous of overwriting my Inverter settings as I have no idea what I am doing 🙂

Speaking of water as an energy storage medium, I was thinking of using a 1000ltr water tank to store heat energy in during the day to heat my house up at night. My PV Panels are capable of generating a lot more power as my batteries are fully charged by 12:00, was thinking of what I could use the extra power for. 1000ltr Flow bin can hold water up to 60c safely, can then circulate that through a water radiator in my house to heat it up (wishing now I have put in underfloor water pipes when I renovated) Alternatively was looking at a Thintank for water storage as a big heatsink in my house, the aren't too confident on it's ability to store water over 50c though. Just heating the water up using a submersible element during the day. http://thintanks.co.za/

Maybe we could convince Bloubul7 to share how his Flows work for reading/saving the settings, looks like the hard work has already been done if I look at his Node Red flows.

What readings would be different between the two inverters? I would think that it would only really be the readings from the MPPT controllers, otherwise everything else would be controlled by the master and I would guess would bbe the same, just thinking out loud? 🙂