Hi Everyone,

From what I've gathered, the Sunsynk name is one of the better known brands of solar inverters, and there are many Sunsynk inverters installed in South Africa and the UK. I have a Sunsynk inverter that was installed some 20 months ago, and like anyone that owns a Sunsynk inverter will hopefully confirm, understanding their working can be a bit "challenging".

I would appreciate it if we could in this thread delve deep into the way that Sunsynk present their data, what things mean, and how to download and store the data associated with your daily use of your solar power system - so please feel free to ask questions, and even more so to respond to those questions if you have the answers...

To start with, not everyone knows about the "Operation Data" function in the Sunsynk Connect computer app. For some reason, I have not been able to find this function in my cellphone's "Sunsynk Connect" app.

So first question:

• Does anyone know where to find this function on the cellphone app...

Anyway, let me explain what this does, and where to find it on your computer app.

First, where to find this function: In the main "landing" screen after opening the app in your browser, click on the ""Operation Data" tab in the left sidebar, and this will open a second "Operation Date" tab...

Clicking on this tab will then open a new window titled "Operation Data", which will be mainly blank, except for this"

Now, proceed as follows:

• Type your inverter serial number (obtainable from the My Plants > Equipment screen) in the space that I marked with "Type number here",

• Then select the date of the data you want to download by clicking on the space that I marked with "Select date here", and a calendar will appear. Select your date by simply clicking on it, or change the "month" and then selecting the date. NOTE: You can only select data within the past three months of your current date - Sunsynk deletes your data after three months...

• Then click on the "Download" button that I marked "Click here to download".

• A new screen will appear with the file you have downloaded, and you can either save it with the ridiculous default name, or just type in a more sensible name and click "save" (obviously after selecting the folder that you want to save it in...

Simple, once you've done about 200 downloads...

Now, what do you get for all this trouble:

A spreadsheet that is roughly 4 times as wide as the screenshot above (it goes to column DJ, and row 291...), with a whole bunch of information, with data saved at approximately 5 minute intervals, one time-slot per row.

And here we come to my next question: The headers of the various columns are REALLY bad (presumably having originated in Chinese...), and there are A LOT of columns that appear to be duplicates, just do not make sense - see below:

Why repeat information that never changes, as highlighted in yellow? It would be logical, and make the file a lot smaller, if all "static" information was shown across the very top of the data set, in one or two rows,rather than have everything repeating 290+ times down many columns...

And here's a complete !@#$%"

Man, I would LOVE to generate 55 MILLION kWh of solar power per year...

But there ARE some useful data, if only one could understand the hieroglyphics:

And this finally brings me to my second question:

What do all these titles mean? And why is there such apparent duplication...

Edited May 21May 21 by HennieL
Typo corrected

To your first question - I don't believe it is available on the mobile app.

To your second question - which particular titles have peaked you interest? worst case scenario copy and paste into google and it should be able to explain. Its just super handy to have all this extra data in the case something goes wrong, helps to pinpoint the fault or time of irregularity.

38 minutes ago, Mattyboy said:

To your second question - which particular titles have peaked you interest? worst case scenario copy and paste into google and it should be able to explain. Its just super handy to have all this extra data in the case something goes wrong, helps to pinpoint the fault or time of irregularity.

Unfortunately. regardless of how clever they sound, AIs can only repeat that which have been published somewhere - and if Sunsynk themselves have not published a definitive explanation of their terms, then our AI's will also not have any definitive answer unless someone else published it - presumably you are aware of the term "GIGO" (Garbage In - Garbage Out...) that is still applicable to AIs. I would love to have some human verification of the terms.

And to respond to your second statement regarding "which particular titles have peaked you interest?" Here's 6 columns giving 3 slightly differing values of what I presume is the power output of the inverter at a particular time - what could be sufficient motivation for these 6 columns of data regarding the power produced...

On 2026/05/21 at 4:06 PM, HennieL said:

But there ARE some useful data, if only one could understand the hieroglyphics:

Let me elaborate on the useful data that can be extracted from the downloaded spreadsheets a bit, as my previous posts do come across a bit negatively...

Using these spreadsheets, one can obtain (amongst others) data (recorded at 5 minute intervals) of :

• Volts and Amps from each PV string connected to the inverter. This is very handy to evaluate effectiveness of the solar panels' vertical angle and/or azimuth, or even just to identify a drop in solar harvest caused by dirt on your panels...

• Grid Voltage and Frequency - the cause of inverter dropouts caused by over- or under voltages protection can be confirmed by this.

• Inverter Power supplied to Load, Aux Load, and Non-essentials (requires some calcs, though...).

• Inverter AC and DC temperatures.

• Battery temperature (reported by the Li-BMS, thus average battery temperature, not cell temperature of individual battery temperatures if using more than one battery...).

• Warning and Error codes. This is handy to identify fleeting errors, and to build up a record of error messages received (all previous messages are lost if an inverter is rebooted to "Factory default")

It is important to regularly download and save the spreadsheets if you want to use this info, as Sunsynk deletes all data after 3 months. Not knowing this initially, I lost months of records - so learn from my mistake...

On 2026/05/21 at 4:06 PM, HennieL said:

Simple, once you've done about 200 downloads...

Now, what do you get for all this trouble:

A spreadsheet that is roughly 4 times as wide as the screenshot above (it goes to column DJ, and row 291...), with a whole bunch of information, with data saved at approximately 5 minute intervals, one time-slot per row.

On 2026/05/23 at 11:09 AM, HennieL said:

Let me elaborate on the useful data that can be extracted from the downloaded spreadsheets a bit, as my previous posts do come across a bit negatively...

Using these spreadsheets, one can obtain (amongst others) data (recorded at 5 minute intervals) of :

• Volts and Amps from each PV string connected to the inverter. This is very handy to evaluate effectiveness of the solar panels' vertical angle and/or azimuth, or even just to identify a drop in solar harvest caused by dirt on your panels...

• Grid Voltage and Frequency - the cause of inverter dropouts caused by over- or under voltages protection can be confirmed by this.

• Inverter Power supplied to Load, Aux Load, and Non-essentials (requires some calcs, though...).

• Inverter AC and DC temperatures.

• Battery temperature (reported by the Li-BMS, thus average battery temperature, not cell temperature of individual battery temperatures if using more than one battery...).

• Warning and Error codes. This is handy to identify fleeting errors, and to build up a record of error messages received (all previous messages are lost if an inverter is rebooted to "Factory default")

It is important to regularly download and save the spreadsheets if you want to use this info, as Sunsynk deletes all data after 3 months. Not knowing this initially, I lost months of records - so learn from my mistake...

I was asked how I go about extracting data from all the daily spreadsheets in order to obtain useful trends, and draw nice graphs. Well, there are probably many ways, but I only use two

• Manual entry: Simply open the daily file, lock the first column and the header rows, then simply scroll to the column of interest, and either copy and paste that row into a new spreadsheet (if you want to use all the data recorded every 5 minutes), or then scroll down to the times that you want data for (like say every hour on the hour...), and then copy those individual cells and paste then into a new spreadsheet, next to the times that you selected. This is slow and rather tedious, but if you really want the data and you don't have any code to automate this, then it's still a lot better than nothing.

• Using a script to automate the process. Now this was quite a challenge for me, as I last "coded" seriously some 45 years ago, using a Dos program... Fortunately, modern programming languages are a lot easier to master, and Python scripts are probably the easiest of the lot. Anyway, I asked one of my young colleagues to assist me with this, and then ran it through an AI to check - and it now works automatically by just clicking on the script. Oh, I must add, I use Linux Mint OS, and it might not be so easy in Windows... If anyone would like a copy, just send me a PM and I will forward it to use - just keep in mind that it does not come with any guarantee 🫠

sorry to dig this up but any idea which columns show the following

Volts and Amps from each PV string connected to the inverter. This is very handy to evaluate effectiveness of the solar panels' vertical angle and/or azimuth, or even just to identify a drop in solar harvest caused by dirt on your panels...

4 hours ago, airtite said:

sorry to dig this up but any idea which columns show the following

Volts and Amps from each PV string connected to the inverter. This is very handy to evaluate effectiveness of the solar panels' vertical angle and/or azimuth, or even just to identify a drop in solar harvest caused by dirt on your panels...

The info is spread around a bit... "vpv1, ipv1, vpv2, ipv2, vpv3, ipv3, vpv4 and ipv4" are in columns AU - BC, and "ppv1 to ppv3" (why no ppv4...) are in columns CL - CN in the 2026 version of their downloadable daily spreadsheets. Sometime in 2025 they added an additional column or two, and thus the earlier versions' pv data might be in different columns.

Hope this helps...

Edited 18 minutes ago18 min by HennieL