AC 200 Max with two B320 not charging via solar.

has the max for 2 years, have solar on my truck and it worked great. I added two expansion batteries and now it still shows power coming in via solar but now none of them charge. BMS will charge for a minute on the expansions then switch to standby. if I unplug expansion the main unit charges fine. is there a setting I’m missing?

@skylark332 Please May I know did your solars are connected with B230 or AC200MAX? If you connect them with B230, you can’t see the input from the screen and APP.