GridBOSS / FlexBOSS21 2 x EG4 WallMount Indoor Battery and Weather Optimize

[Mike1999]

Thanks for the detailed post Tommytwotone, I'll keep that info handy.

Great news however, Phil from SS called me late yesterday and after about 10 minutes of reviewing settings and making a couple of quick changes life is much better! He also explained some of the details around a few settings that I wasn't sure of etc. Including setting it correctly so that my AC coupled SolarEdge system continues to work when the grid goes down. Tested that just a bit ago and everything kept chugging along, including charging the batteries, when I shut the grid connection off. Fabulous! I had hoped it worked this way but reading around here and other forums it didn't sound like that would even be possible.

My system does also continue to push power to the grid when in backup mode and full batteries rather than shutting down solar production to keep from sending back to the grid.

Hopefully all is well now but I'll keep an eye on the battery levels after sundown...

He told me that if they battery levels get out of whack with each other I may need to do the process Tommytwotone described above by temporarily changing the battery type to lead acid and setting the bottom voltage to 47 volts etc. I'll cross that bridge if it happens.

Also received an email from the tech that was going to call but didn't apologizing for not getting back to me. I appreciate that and understand sometimes things don't go as planned.

Fingers crossed for smooth sailing in the future.

I'll post back how things go after a few days.

Thank again for your help!

 

[CaySol]

Thanks for the detailed post Tommytwotone, I'll keep that info handy.

Great news however, Phil from SS called me late yesterday and after about 10 minutes of reviewing settings and making a couple of quick changes life is much better! He also explained some of the details around a few settings that I wasn't sure of etc. Including setting it correctly so that my AC coupled SolarEdge system continues to work when the grid goes down. Tested that just a bit ago and everything kept chugging along, including charging the batteries, when I shut the grid connection off. Fabulous! I had hoped it worked this way but reading around here and other forums it didn't sound like that would even be possible.

My system does also continue to push power to the grid when in backup mode and full batteries rather than shutting down solar production to keep from sending back to the grid.

Hopefully all is well now but I'll keep an eye on the battery levels after sundown...

He told me that if they battery levels get out of whack with each other I may need to do the process Tommytwotone described above by temporarily changing the battery type to lead acid and setting the bottom voltage to 47 volts etc. I'll cross that bridge if it happens.

Also received an email from the tech that was going to call but didn't apologizing for not getting back to me. I appreciate that and understand sometimes things don't go as planned.

Fingers crossed for smooth sailing in the future.

I'll post back how things go after a few days.

Thank again for your help!

What settings keep your ac coupled system online?

 

[Quattrohead]

Yes please post all of your settings that are working successfully now so that we can all learn from them.

 

[Mike1999]

What settings keep your ac coupled system online?

If, and that's a big if, I understand it correctly to get your AC coupled solar to keep producing when the grid goes down you:

-Set the Smart Port you are using to 'AC Couple'.
-Set the AC Couple 1 Start and End SOC to something appropriate. Mine is setup to 21 and 99 meaning that the AC Couple will be 'up' if SOC is below 99% and above 21%. The 99% makes sense to me - the output needs somewhere to go so it can't more than 99%. I'm unsure why the 21% - seems like that should be zero but maybe there is a reason.
-Set the Start and End times - Mine is set to start at 00:00 and end at 23:59.

Testing this by shutting the grid off on main panel with the SOC less than 100% worked. In the past I had only tested it when my SOC was 100% so when I shut the grid off it also shut off my AC Coupled SolarEdge connected to the Smart Port.

This is all just how it works in my mind - I could be wrong but it worked so I'm happy with that!

 

[Mike1999]

Yes please post all of your settings that are working successfully now so that we can all learn from them.

The settings in pictures earlier in the thread with the changes below are my current settings.

If I understand it correctly, having the limit to 100% can cause trouble because it will stop charging the batteries before they are actually completely charged. If you set it 101%, the BMS on the battery will stop the charge when it is actually at 100%. I suspect in my case the batteries were not being fully charged so as they were discharging the reported charge level would drop quickly and then the battery goes into 'protections' where it stops the discharge completely and the battery disappears as far as the FLEXBoss is concerned and causing the errors. Then I would cycle the batteries and they would charge but wouldn't fully charge - especially with the bad weather where they would charge off and on depending on what little sun was producing power. I think that if you set the SOC limit to 101% it essentially leaves the charging max up to the BMS in the battery.

That's my theory anyway - if I understood what Phil from SS was describing anyway.

If anyone has any other ideas, please let me know.

-In ‘old settings’ page, AC Charge – remove AC Charge Start and End time. Was 00:00 to 23:59.

-In ‘old settings’ page, Battery Backup Mode – remove Battery Priority Start and End time. Was 00:00 to 23:59.

-In Battery Setting, changed System Charge SOC Limit to 101% - was 100%

 

[coolcat]

Thanks for sharing your experiences! I am currently exploring adding a similar system to my Enphase solar system with my existing solar connected with AC coupling to the GridBOSS on the smart port. I’m looking to start out with 5 of the Indoor Wallmount batteries. I’m going to save this thread to refer back to as everything gets set up.

 

[Tommytwotone]

The settings in pictures earlier in the thread with the changes below are my current settings.

If I understand it correctly, having the limit to 100% can cause trouble because it will stop charging the batteries before they are actually completely charged. If you set it 101%, the BMS on the battery will stop the charge when it is actually at 100%. I suspect in my case the batteries were not being fully charged so as they were discharging the reported charge level would drop quickly and then the battery goes into 'protections' where it stops the discharge completely and the battery disappears as far as the FLEXBoss is concerned and causing the errors. Then I would cycle the batteries and they would charge but wouldn't fully charge - especially with the bad weather where they would charge off and on depending on what little sun was producing power. I think that if you set the SOC limit to 101% it essentially leaves the charging max up to the BMS in the battery.

That's my theory anyway - if I understood what Phil from SS was describing anyway.

If anyone has any other ideas, please let me know.

-In ‘old settings’ page, AC Charge – remove AC Charge Start and End time. Was 00:00 to 23:59.

-In ‘old settings’ page, Battery Backup Mode – remove Battery Priority Start and End time. Was 00:00 to 23:59.

-In Battery Setting, changed System Charge SOC Limit to 101% - was 100%

Just in time for a new firmware update. Are you going to do it right away or give it awhile first? What are your thoughts?

 

[CaySol]

Just in time for a new firmware update. Are you going to do it right away or give it awhile first? What are your thoughts?

It seems like it was tested for a while before the release yesterday. I updated with no issues.

 

[Mike1999]

I installed the new firmware yesterday. So far so good.

The weather optimize setup still eludes me - maybe EG4TechSolutionsTeam could explain how weather optimize is supposed to work and how to configure it?

Thanks!