Hello everyone. I’m new to the forum and solar in general, but this seemed like a great place to get some help. I have a 600 watt solar system. Running 6-6volt gel batteries. I recently ran into an issue when I upgraded my controller. My first battery in is undercharging at 5v while the other one is trying to overcompensate it in that 12v bank. I have my trailer positive and controller positive running into that battery. I just replaced that battery as I thought it was bad only to find out that isn’t the issue. I have an inverter wired on the opposite bank terminals. Would that possibly be affecting it. Should I run them on consistent terminals? Any help would be greatly appreciated. I’ve searched all over the internet with no luck.