But you just stated you have 240 going to the inverter and you are only using one leg of the outbound.
Let me clarify, bringing in a 10 gage 3 wire from AC power to the inverter, earth ground, line 1 and , would show that AC was connected to the inverter, yet, the inverter would not charge the bat stack at all, yet the bat pack would send power to the grid. I ran a 4 wire to the panel to run incoming 240, and BAMM, it started charging the bat stack. Outgoing is only done with earth ground, line 1 and neutral creating a 120 output, not a 240. So, with everything I have dealt with, you need 240 coming into the inverter for it to kick in and charge the bat pack, yet by just using one pole (line 1 or 2 on the outgoing feed to grid) it will run your 120 outlets ect, but will not power 240 equip.
Maybe this will help you understand what i am doing with the system. It is installed on a 103 foot commercial fishing vessel. The system is going to be running all the 110/120 power while we travel in Alaska, and we have no need of any 240/480 power usage. Next year, if the system works good, I am going to do a 12kw set up for the boat. So, at this point, I just need 120 output from the system. After days of trying to get answers on if it would work with a 120 input from AC to charge the bank, the only thing that has worked is running 240 to the inverter for it to charge the bat bank. I do have a scheduled call for Monday morning at 7 am my time to speak with an Engineer regarding the setup, and how to get deeper into the settings, but we leave for Alaska Sunday evening, so, I had to go with 240 in to charge until I get into deeper settings than what the basic tech support can do. So, I did what needed to be done, and also installed Star Link Maritime so as to have the ability to deal with this on the 7 day trip up to the fishing grounds. We do have gen sets to keep everything going, yet, when you can bypass using fuel, its a good thing.
First time installing one of these systems, so I am as cherry as can be with it.
Oh, and when I purchased the kit, I was told I only needed 120 incoming to do a 120 output to grid. They failed to mention that to charge the bat rack that i needed 240 incoming. That has been my whole issue.