36 minutes ago, wolfandy said:

If @Rclegg has enabled the 'Use SOC for Control' on the Settings/Battery tab, then these voltages should be at 46V or 47V for 'Back to Grid' and 58V for 'Back to Discharge' - to ensure that the Axpert's own settings do not interfere with ICC switching the inverter 

Your 'Charger Source Priority' is set to 'No AC Charge. Solar Charge Battery first then power Loads'. You can see that your PV (green line) was slightly higher than your Battery (purple), which means you were producing slightly more than your set battery charging current. The surplus was used to power the loads, supplemented by AC (your blue Loads line is slightly higher than your red AC line). I do not know what other settings you have available for 'Charger Source Priority', but there should be something like 'No AC Charge. Solar power Loads first, then charge Battery' (I do not know your model that well)

Then just make sure that you have the settings above in place and the 'Use SOC for Control' enabled with SOC settings of your choice

Okay, that sounds reasonable. 

This model of inverter does not blend AC and PV - I know it blends PV and Battery for loads. 

I do not have SOC for Control in the settings tab enabled. I will give that a go and see what happens. I will set it to time based or SOC based? Did see a screenshot where one was "To grid: 24" and to to Solar SBU" 26" However I was not sure what that actually meant. Is that 24 volts or ?? 

 

As for the charger source priority I have the following available. 

 

Let me try what you recommend and I will report back during the day tomorrow when there is some PV power available. 

 

Appreciate the feedback and help. 

52 minutes ago, Rclegg said:

This model of inverter does not blend AC and PV - I know it blends PV and Battery for loads. 

Ok - then this is weird. Then I do not understand why your load is higher than your AC consumption (even though it might then just be an ICC reporting problem where the excess PV gets added to the load. I remember having a similar problem at one point - maybe drop Manie an email and ask him to look into it?)

52 minutes ago, Rclegg said:

I will set it to time based or SOC based? Did see a screenshot where one was "To grid: 24" and to to Solar SBU" 26" However I was not sure what that actually meant. Is that 24 volts or ?? 

If you enable  'Use SOC for Control' it will change based on the actual SOC reported by your Pylon's BMS. The values you can set are based on %SOC. The values in my earlier screenshot mean that ICC switches the inverter to Grid when the battery has been drained to 24% SOC and will switch back to SBU once the battery has been recharged to 26%. You will need to play around and see what values work best for you.

Keep in mind that even while running on Grid, your inverter will draw somewhere around 40W from the battery for self-consumption - which means that during the night your battery SOC will drop a bit even while running on Grid

In the morning, even though I am starting to produce the first bit of PV, my system will still run on Grid and the PV will be used to start charging the battery. Once the SOC has increased to my 26%, ICC will then switch the inverter back SBU (that is around the value at which my PV production equals my load)

 

Edited August 18, 20205 yr by wolfandy
Pressed the wrong button...

57 minutes ago, Rclegg said:

As for the charger source priority I have the following available. 

I would recommend the last one 'No AC charge. Solar power load first then charge battery'. This means that PV will be used to power the loads and any excess energy will be used to charge your batteries

27 minutes ago, wolfandy said:

Ok - then this is weird. Then I do not understand why your load is higher than your AC consumption (even though it might then just be an ICC reporting problem where the excess PV gets added to the load. I remember having a similar problem at one point - maybe drop Manie an email and ask him to look into it?)

Yeah, I am not sure of that. I will keep logging and checking throughout the week and test some more - my understanding is that load cannot be higher AC consumption in this use case. If I don't come right, I will message him and check. 

29 minutes ago, wolfandy said:

If you enable  'Use SOC for Control' it will change based on the actual SOC reported by your Pylon's BMS. The values you can set are based on %SOC. The values in my earlier screenshot mean that ICC switches the inverter to Grid when the battery has been drained to 24% SOC and will switch back to SBU once the battery has been recharged to 26%. You will need to play around and see what values work best for you.

Okay, yeah that makes a lot more sense now. So it will stay in SBU mode as long as the battery is above 26% of SOC? - but if PV is available, it should be using that, correct? 

30 minutes ago, wolfandy said:

Keep in mind that even while running on Grid, your inverter will draw somewhere around 40W from the battery for self-consumption - which means that during the night your battery SOC will drop a bit even while running on Grid

This was going to be my next question; I noticed that too. So that's completely normal? 

31 minutes ago, wolfandy said:

In the morning, even though I am starting to produce the first bit of PV, my system will still run on Grid and the PV will be used to start charging the battery. Once the SOC has increased to my 26%, ICC will then switch the inverter back SBU (that is around the value at which my PV production equals my load)

For your SOC to be lower than 26% in the morning, I assume you are using the batteries in the night and then charge them up using the PV in the morning - and once they get to 26% SOC - the inverter goes to SBU mode (Due to ICC setting) and continues to charge them + give you PV for the house? 

27 minutes ago, wolfandy said:

I would recommend the last one 'No AC charge. Solar power load first then charge battery'. This means that PV will be used to power the loads and any excess energy will be used to charge your batteries

Thanks, I have made this change too. 

Appreciate the help @wolfandy - will report back tomorrow and see what the system does. 

46 minutes ago, Rclegg said:

So it will stay in SBU mode as long as the battery is above 26% of SOC? - but if PV is available, it should be using that, correct? 

Correct. SBU means Solar -> Battery -> Utility. It will use PV (if necessary supplemented by battery) while available, then battery until the SOC drops down to the level you have set, at which point it will switch back to Utility

50 minutes ago, Rclegg said:

This was going to be my next question; I noticed that too. So that's completely normal? 

Yes. For some reason the Axpert is built that even if it is running on Utility, it will power it's own consumption from the batteries

51 minutes ago, Rclegg said:

For your SOC to be lower than 26% in the morning, I assume you are using the batteries in the night and then charge them up using the PV in the morning - and once they get to 26% SOC - the inverter goes to SBU mode (Due to ICC setting) and continues to charge them + give you PV for the house?

Correct. (Unless we are in heavy loadshedding) I drain my Pylons every night. If the SOC drops to 24% during the night, ICC will switch over to Utility - but the Axpert's self-consumption will drop the SOC a bit further (you have to play around a bit to figure out what value the best for you is so that your SOC never drops below 20%). Once PV production starts, it will start charging the batteries (while the loads might still be powered by Utility). Once the battery gets up to 26%, ICC will switch the Axpert back to SBU mode and the loads will be powered by Solar (if you set this point too low than your Solar might not yet be sufficient to power your loads, which means the inverter will start drawing on the batteries again to supply the difference and your SOC will drop again)

8 hours ago, wolfandy said:

Correct. SBU means Solar -> Battery -> Utility. It will use PV (if necessary supplemented by battery) while available, then battery until the SOC drops down to the level you have set, at which point it will switch back to Utility

Yes. For some reason the Axpert is built that even if it is running on Utility, it will power it's own consumption from the batteries

Correct. (Unless we are in heavy loadshedding) I drain my Pylons every night. If the SOC drops to 24% during the night, ICC will switch over to Utility - but the Axpert's self-consumption will drop the SOC a bit further (you have to play around a bit to figure out what value the best for you is so that your SOC never drops below 20%). Once PV production starts, it will start charging the batteries (while the loads might still be powered by Utility). Once the battery gets up to 26%, ICC will switch the Axpert back to SBU mode and the loads will be powered by Solar (if you set this point too low than your Solar might not yet be sufficient to power your loads, which means the inverter will start drawing on the batteries again to supply the difference and your SOC will drop again)

 

Thanks @wolfandy - really appreciate the info. Makes a lot of sense. 

 

So this morning, the SOC was at 21% and then battery started charging. Got to 26% and inverter went to SBU mode as ICC sets. However, then battery started draining and I figured it was due to not enough PV available. 

However, when it went back to grid at 24% - this happened: - There is enough PV for the house + battery? 

Starting to suspect the inverter is at fault. 

If I change it to SBU mode it just starts draining the battery. Going to leave it in utility mode, so I have battery back up for later.  

1 minute ago, Rclegg said:

Starting to suspect the inverter is at fault. 

If I change it to SBU mode it just starts draining the battery. Going to leave it in utility mode, so I have battery back up for later.  

Yeah I am starting to think it might be faulty too... 

2 hours ago, Rclegg said:

However, when it went back to grid at 24% - this happened: - There is enough PV for the house + battery? 

Hmm. Something weird happened. Can you please post screenshots both of your current Battery and Inverter Settings tabs?

Looking at your chart above, it seems that just before 07h30 ICC switched you back to SBU (at which point your PV also seemed to be higher than your load). However, then you switched on a significant load, which put a lot of strain on your Pylon (a single Pylon does not like to drive more than 1800W of load, which you exceeded by quite a bit at that point) and your system switched back to Utility (I cannot tell if this was due to the SOC reaching your set point or if the Pylon BMS kicked in to protect itself). At around 07h40 it switched back to SBU - however for some reason then did not use PV to power the loads but instead only the batteries

1 minute ago, wolfandy said:

Hmm. Something weird happened. Can you please post screenshots both of your current Battery and Inverter Settings tabs?

Looking at your chart above, it seems that just before 07h30 ICC switched you back to SBU (at which point your PV also seemed to be higher than your load). However, then you switched on a significant load, which put a lot of strain on your Pylon (a single Pylon does not like to drive more than 1800W of load, which you exceeded by quite a bit at that point) and your system switched back to Utility (I cannot tell if this was due to the SOC reaching your set point or if the Pylon BMS kicked in to protect itself). At around 07h40 it switched back to SBU - however for some reason then did not use PV to power the loads but instead only the batteries

 

So right now, my load is 800w - battery is fully charged, I switch to SBU and it just starts draining the battery. Wont use PV for the load. 

7 minutes ago, Rclegg said:

Starting to suspect the inverter is at fault. 

Let us first confirm that all your settings are correct. Your PV does work when used to charge batteries and the inverter is in Utility mode - but drops when it goes into SBU. I would still guess it is a settings problem (maybe even conflicting settings between ICC and the inverter)

Just now, wolfandy said:

Let us first confirm that all your settings are correct. Your PV does work when used to charge batteries and the inverter is in Utility mode - but drops when it goes into SBU. I would still guess it is a settings problem (maybe even conflicting settings between ICC and the inverter)

 

I really hope its a config. 

Here are current settings as of 5 mins ago. 

I did try set the PV charge current to 10AMP to see if that would make a difference. It did not. 

6 minutes ago, wolfandy said:

Let us first confirm that all your settings are correct. Your PV does work when used to charge batteries and the inverter is in Utility mode - but drops when it goes into SBU. I would still guess it is a settings problem (maybe even conflicting settings between ICC and the inverter)

If I read this graph correctly, it looks like PV tries to pick up the load, but won't. 

2 minutes ago, Rclegg said:

Here are current settings as of 5 mins ago. 

Thanks. A few questions/comments:

1. For 'Charger Source Priority', did you press the 'Set' button after you've changed it to the current selection? And did ICC respond with 'OK' in the white box next to it (as it does for 'Output Source Priority')?
2. You should set 'Max PV Charging Current' to 30A (submit any changes on this tab always with the 'Set' button next to the relevant field)
3. You should set 'Max AC Charging Current' to 30A 
4. I would set 'Back to Grid Voltage' to 47V (so that the Axpert's own settings do not interfere with ICC)
5. I would set 'Back to Discharge Voltage' to 54V or higher (so that the Axpert's own settings do not interfere with ICC)
6. On the Battery tab, did you press the 'Save' Button at the bottom right after you have made changes? ICC does not act on any changes unless they have been saved

Hi there.

 

Take your ac input range back to Appliance and Not UPS. Mine also uses the battery when in UPS mode

11 minutes ago, wolfandy said:

Thanks. A few questions/comments:

1. For 'Charger Source Priority', did you press the 'Set' button after you've changed it to the current selection? And did ICC respond with 'OK' in the white box next to it (as it does for 'Output Source Priority')?
2. You should set 'Max PV Charging Current' to 30A (submit any changes on this tab always with the 'Set' button next to the relevant field)
3. You should set 'Max AC Charging Current' to 30A 
4. I would set 'Back to Grid Voltage' to 47V (so that the Axpert's own settings do not interfere with ICC)
5. I would set 'Back to Discharge Voltage' to 54V or higher (so that the Axpert's own settings do not interfere with ICC)
6. On the Battery tab, did you press the 'Save' Button at the bottom right after you have made changes? ICC does not act on any changes unless they have been saved

1. Yep
2. Done
3. Done
4. Done
5. Done
6. Yeah I did now 

 

Now its working, But lets see how long it stays in this mode. Holding thumbs! 

 

Edited August 19, 20205 yr by Rclegg

9 minutes ago, Krokkedil said:

Hi there.

 

Take your ac input range back to Appliance and Not UPS. Mine also uses the battery when in UPS mode

Will make the change. Thank you. 

Awesome! Glad it's working.

18 minutes ago, Rclegg said:

Now its working, But lets see how long it stays in this mode. Holding thumbs! 

😬 Keep us posted here

15 minutes ago, francois said:

Awesome! Glad it's working.

It was.  

It switched to battery now 

Any ideas @wolfandy ?

2 minutes ago, Rclegg said:

It was.  

It switched to battery now 

Can you please post a screenshot of your Graphs/Battery Trends tab (see mine below as example)?

And maybe also of Graphs/PV Trends?

2 minutes ago, wolfandy said:

Can you please post a screenshot of your Graphs/Battery Trends tab (see mine below as example)?

 

Sure  (Note I switched it back to Utility as I need to keep battery topped up for load shedding later ) 

 

I have a 3kva Mecer/Voltronic with 9*330 w pannels and 4 * 200Ah Narada AGM batteries.

I have tried all the combinations of settings. The system always draw some power from the batteries. 

I moved to cape town a month ago and the system never produces more than 1,5kw from the solar panels. it should give me close to 3kw but the mmpt is only 2,4kw. and limit it but since reconnecting it in cape town i only get 1,5 kw 

Good luck it will drive you crazy