Solar Assistant setting Grid Sell Back Power(kW) on the FlexBoss21 inverter

[Richw68]

I am setting the Grid Sell Back Power(kW) with solar assistant on the FlexBoss21 inverter.



The problem is Solar Assistant is setting this value as a percentage and not a value as the FlexBoss wants. Interestingly enough if I use 100% in Solar asst it sets the value to 10. In fact with the FlexBoss 21 the max is 12 from what I have researched. Has anyone ran into this? I have also sent an email to Solar asst as well and I am waiting on a response.

Below is the corresponding setting in the eg4 monitor.


The end goal. I am in self consumption mode and using PV to power loads, charge batteries and then sell back. I don't want to sell back any power until my batteries have been charged. The problem is in self consumption mode and sell back enabled the inverter power loads, charges batteries. In the addition though it seems to split the power between charging the batteries and selling back. Spoke with eg4 support and this is the designed behavior. Given that I setup a Solar Asst automation to set the value once the SOC has reached 95%. The issue is I cannot set it to 12. Only 10 since it is using a percentage.

Thanks,
Rich

 

[SunDave]

I don't want to sell back any power until my batteries have been charged.

Hi Rich. That's not default behavior? Usually on hybrid inverters they do exactly that. Charge batteries then sell, if sell is enabled.

I'm sure you thought of this as well, but have you considered changing the setting directly on the unit?

I have a hybrid inverter, but not EG4. Maybe this will help bump you back to the top and you will get a better answer. Good luck.

 

[skimandan]

I recommend you chase EG4 on the behavior of the inverter while in self consumption mode. That’s not right. Could be a configuration error or a firmware issue.

Make sure you’re on version2525 of the firmware. Very few complaints.

Provide pictures using EG4 tools and tag the usual eg4 folks in here and leave SA out.

Good luck!

 

[Richw68]

The crazy thing is I had a single inverter and 3 indoor wallmount batteries. Had the same config and I could have sworn I did not start selling back until my batteries were at 100% SOC (system has only been running for about 2 months). I added a second inverter and an additional wallmount battery and cannot seem to get things to operate as before which is why I contacted support. Along the way I also updated the firmware to 2525.

Can anyone here confirm or deny the way self consumption mode works when grid sell back is enabled? @EG4TechSolutionsTeam would you like to comment?

 

[EG4TechSolutionsTeam]

The crazy thing is I had a single inverter and 3 indoor wallmount batteries. Had the same config and I could have sworn I did not start selling back until my batteries were at 100% SOC (system has only been running for about 2 months). I added a second inverter and an additional wallmount battery and cannot seem to get things to operate as before which is why I contacted support. Along the way I also updated the firmware to 2525.

Can anyone here confirm or deny the way self consumption mode works when grid sell back is enabled? @EG4TechSolutionsTeam would you like to comment?

Are you using a GridBoss with your system?

 

[Richw68]

Yes, I have the GB and 2 FB21 with 4 Indoor wall-mount batteries. Currently PV on one FB and batteries are shared between both FB.

 

[alvitdk]

When does your system start selling back? Remember when the batteries get to around 90%, the charing amperage goes down and terefore it starts selling back if there is more PV power coming in than you have load connected.

 

[Richw68]

When does your system start selling back? Remember when the batteries get to around 90%, the charing amperage goes down and terefore it starts selling back if there is more PV power coming in than you have load connected.

They start selling back even at 25%. You can see it splitting the PV between sell back and battery after it satisfies the load demand.

 

[alvitdk]

That's indeed odd. I have two FB21 and 3 batteries...and as expected it only sends power back if the load requirement is fulfilled...if it helps, here are my settings:

 

[Richw68]

Mine is the same exact config. Just changed my Grid sell back to 12 from 0 and waiting 20-30 seconds and this is what I get.

 

[alvitdk]

That's odd....sorry, I guess that's a EG4 question

 

[Richw68]

That's odd....sorry, I guess that's a EG4 question

lol no worries! Thanks for the config. Confirms I'm not smoking something funny

 

[EG4TechSolutionsTeam]

lol no worries! Thanks for the config. Confirms I'm not smoking something funny

Are you seeing the same thing on the EG4 app or monitor system?

The reason is because third-party apps don't always provide the most accurate data.

 

[Richw68]

Are you seeing the same thing on the EG4 app or monitor system?

The reason is because third-party apps don't always provide the most accurate data.

Yes I am.

 

[EG4TechSolutionsTeam]

Yes I am.

View attachment 345065

We are getting with our R&D team about this, and we’ll let you know as soon as we have an update.