Pylontech stack - additional charger?

[nowty]

Nowty. Am not understanding the 'operating mode4' comment, cant seem to find any ref in my manual to that currently, nor on any inverter settings, i'll have to dig a little digger. Lots of folk in South Africa with Ecco Sunsynks so time for a Google on that.

I'm looking at your manual, pages 69 to 71, although I can't work out from the manual how you change the mode.
https://www.sunsynk.org/_files/ugd/52fa ... b67305.pdf

There is a note on the website about upgrading the firmware if your model number is a SUNSYNK-3.6k-SG01LP1.
https://www.sunsynk.org/3-6kw-hybrid-inverter

One of the specs of the ECCO model is, "AC couple – For additional PV input". This is why I speculated in an earlier message that it might be currently set up as DC coupled. I.e, only charges from the PV connected to the Sunsynk inverter.

NOTE - I'm not familiar with your brand of inverter.

[pudding]

Pudding. Screen shots attached. seems our screens are different looking but have the same options.
Looking on my AUX LOAD (micro inverter input) settings, do these agree with yours?
Id have thought the 'AC couple ON batt' setting should be 0, rather than 95%?
From what i understand of the wording,id have thought my settings are instructing the Sunsynk to only use this power once the batteries are at 95% - which is pretty useless it seems.

Also, do you use the 'Aux Load Output' settings feature? This allows you to keep using the PV/invertors power creation ability, once it has filled the batteries and ramped down to zero export. Effectively it sends any power it can still create to a 'smart' load (in my case a double socket wired into the GEN connection) to power somethinglike an immersion, in my case my A2A hearpump. Very usefull feature and worth a look if your not using it. Its the one thing on this invertor that i have managed to get set up well.

Robi. How did you get on with capturing your FIT power and sending to your Pylontechs, after changing your settings to match Puddings?

Hi,

My screenshots are just from the web portal rather than the actual inverter screen, saves me traipsing to my garage and back to look at things, but all the setting should be there, albeit in different forms/places perhaps? Have you not got that set up yet, makes things a lot easier.

With your settings there on sys mode2, you don't have solar export ticked? You also mention about when the batteries are fully charged using the aux load via the gen connection, in order to send power to your A2A HP. Are you saying that when solar power is generated the Sunsynk is not actually powering anything in your house, apart from the aux load when the batts are full?

If so, I think you need to check the solar export box, so that the solar will go to your house via the grid connection (in essence being 'exported' from the inverter), and then any excess solar goes to charge the batteries. So to answer your question, no I don't use the aux load feature, as when my batts are full, my house will be powered from any solar generated already via its grid connection anyway.

Also, as you can only actually connect 1 thing to the gen connection, I think you can only choose to select on active option under the auxiliary load, either gen/aux load /micro-inverter, and i think by choosing micro-inverter its effectively telling the Sunsynk there is another inverter (aimed at wind-turbines i think) in the house/system, and to divert any excess power exported back to the batteries.

[resybaby]

Right guys i think i have cracked this now, its kind of a settings issue rather than CT.

I have actually seen my Sunsynk inverter putting a full charge (it was showing 4.1kw, rather than 3.6) going into my Pylontechs when its connected pv panels were only producing around 2.5kw - i didnt get a photo showing this unfortunately. The difference was being made up by the FIT connected system, they are closeby so could add the two readings easily. I also turned off the FIT system momentarily to double check and the power going into the battery dropped correspondingly.

The Ecco Sunsynk has a screen call AUX LOAD in there are three options
GEN Input, AUX Load Output and For Micro-Invertor Input.
Its all down to how you operate/choose these functions as to whether you can charge from the separate FiT system.

I have been using AUX load output to power an 'excess solar' double socket that supplies my A2A heatpump.
When this setting is selected, and your batteries hit 100% the Sunsynk continues producing power via PV, rather than ramp down due to no demand, and it diverts that power to this 'excess solar' socket to use, until the "off batt" figure is reached as your batteries depleat (in my case 95%). The main screen on the invertor shows a "SMART" option when running in this mode.





Running with these AUX LOAD settings selected as shown above means my FiT power, from my other system, is NOT SENT TO MY BATTERY - hence my initial questions.

As i dont have "micro invertors" for the additional option i have never touched that beforehand.

However after reading/seeing Puddings setttings and posts, i decided to have a play with it.

It turns out that when this "FOR MICRO INVERTORS INPUT" option is selected the power generated from my Fit system DOES GO TO THE BATTERY under normal operating.

The 'excess solar' socket also continues to get power, just like the AUX LOAD example above, so the benifits of the invertor continuing to produce power from the pv when the battery is at 100% remains - i can still operate my A2A heatpump and use that additional power whilst my batteries remain at 100%. The only difference seems so far is that i capture the FIT pv power.

There is also a subtle difference on the main screen, when compared to the AUX LOAD setting, where "SMART" is displayed when using this mode.

When running with "FOR MICRO INVERTORS INPUT" selected, instead of displaying "smart", it displays a number in almost unreadable green writing almost in the same location. This is a reading in Watts, quite where it comes from i have no idea, itmwould appear to be the current load? but it does clearly indicate your in a different setting on the mains screen.





So in short, to capture the FIT power operate in "FOR MICRO INVERTORS INPUT" mode, not "AUX LOAD OUTPUT" mode.

Would be lots easier if the manual was better than scrap paper though.

[resybaby]

Also added an extra US5000 battery this morning.

Blimey it took some lifting.

[resybaby]

"With your settings there on sys mode2, you don't have solar export ticked? You also mention about when the batteries are fully charged using the aux load via the gen connection, in order to send power to your A2A HP. Are you saying that when solar power is generated the Sunsynk is not actually powering anything in your house, apart from the aux load when the batts are full?"

I have a zero export restriction on my additional system, so cant tick export. The last point, no, the sunsynk powers the whole house, as well as the AUX LOAD.

"If so, I think you need to check the solar export box, so that the solar will go to your house via the grid connection (in essence being 'exported' from the inverter), and then any excess solar goes to charge the batteries. So to answer your question, no I don't use the aux load feature, as when my batts are full, my house will be powered from any solar generated already via its grid connection anyway."

See mymother post for what uve discovered about the AUX LOAD setting, i doubt i'll be using it in the future either - from m6 tinkering, and your helpful posts, i think the FOR MICR INVERTORS INPUT" setting is the way to go - all the benifits of the AUX LOAD and the FIT power is captured for the batterys.

"Also, as you can only actually connect 1 thing to the gen connection, I think you can only choose to select on active option under the auxiliary load, either gen/aux load /micro-inverter, and i think by choosing micro-inverter its effectively telling the Sunsynk there is another inverter (aimed at wind-turbines i think) in the house/system, and to divert any excess power exported back to the batteries."

Yes, agreed, this paragraph is what tempted me to tick the box and have a play with it. It works exactly how you say in capturing the FiT power as id wanted. Many thanks for your input on this, this invertors quite a hard one to 7nderstand and set up - my installer hadnt a clue and abandoned it to me, and the manual . . . . . well. . . . . theres another story.

[richbee]

Right guys i think i have cracked this now, its kind of a settings issue rather than CT.

I have actually seen my Sunsynk inverter putting a full charge (it was showing 4.1kw, rather than 3.6) going into my Pylontechs when its connected pv panels were only producing around 2.5kw - i didnt get a photo showing this unfortunately. The difference was being made up by the FIT connected system, they are closeby so could add the two readings easily. I also turned off the FIT system momentarily to double check and the power going into the battery dropped correspondingly.

The Ecco Sunsynk has a screen call AUX LOAD in there are three options
GEN Input, AUX Load Output and For Micro-Invertor Input.
Its all down to how you operate/choose these functions as to whether you can charge from the separate FiT system.

I have been using AUX load output to power an 'excess solar' double socket that supplies my A2A heatpump.
When this setting is selected, and your batteries hit 100% the Sunsynk continues producing power via PV, rather than ramp down due to no demand, and it diverts that power to this 'excess solar' socket to use, until the "off batt" figure is reached as your batteries depleat (in my case 95%). The main screen on the invertor shows a "SMART" option when running in this mode.





Running with these AUX LOAD settings selected as shown above means my FiT power, from my other system, is NOT SENT TO MY BATTERY - hence my initial questions.

As i dont have "micro invertors" for the additional option i have never touched that beforehand.

However after reading/seeing Puddings setttings and posts, i decided to have a play with it.

It turns out that when this "FOR MICRO INVERTORS INPUT" option is selected the power generated from my Fit system DOES GO TO THE BATTERY under normal operating.

The 'excess solar' socket also continues to get power, just like the AUX LOAD example above, so the benifits of the invertor continuing to produce power from the pv when the battery is at 100% remains - i can still operate my A2A heatpump and use that additional power whilst my batteries remain at 100%. The only difference seems so far is that i capture the FIT pv power.

There is also a subtle difference on the main screen, when compared to the AUX LOAD setting, where "SMART" is displayed when using this mode.

When running with "FOR MICRO INVERTORS INPUT" selected, instead of displaying "smart", it displays a number in almost unreadable green writing almost in the same location. This is a reading in Watts, quite where it comes from i have no idea, itmwould appear to be the current load? but it does clearly indicate your in a different setting on the mains screen.





So in short, to capture the FIT power operate in "FOR MICRO INVERTORS INPUT" mode, not "AUX LOAD OUTPUT" mode.

Would be lots easier if the manual was better than scrap paper though.

Sounds very good indeed - well done for playing and testing it out.
Hopefully will work on mine too when I get extra solar panels with micro-inverters