The best way would be to connect both batteries with the paralleling cables and connect the Master battery to the inverter as shown in the image below...

@david-luke Do you have a 6000XP with the same warning 25 and 27?

@rcg123 Do you have the inverter online?What batteries are you using for your system?

@george-redingerHave you always had Power Backup disabled?

Yes, that’s correct. You need to press the “Read” button at the top of the page to view the configured settings.

Just to confirm, when you flip the switch located under the inverter to turn it on, the screen doesn’t power on. Is that correct?

@joffreyfontaine I responded to your DM and I have submitted a parts request to get a replacement dongle sent to you.

I don't believe that option is on the screen. You would need to use the EG4 Monitor website to see that setting.

@drewc Yes, that’s correct! You need to connect the cables to the Grid port in order for the inverter to start reporting data. I’m glad you were able ...

We apologize that we were unable to make changes to the firmware at this time. Updating the firmware involves a formal process, which requires careful...

Ensure that the cables are properly connected between the inverter and Gridboss, and verify that the DIP switches are set to the 'up' position on both...

You should be fine regarding the amperage. You’re correct, as long as you don’t exceed 31A on MPPT 1 and 2, it will not cause issues. The amperage can...

Can you specify what do you mean by fails?

You will need a 240V generator to connect it to the GridBoss.

@solartom Have you enabled AC Charge? You can enable it and set it to 20% and let me know if the battery starts charging.