Almot
8a off of a 230w 24 panel with a MPPT charger in bulk early on when the batteries voltage is low, I see that between 5:30 and 6:00 AM before the sun fully breaks the horizon. By six I'm seeing 10a and climbing.
The concept is that when the 12v panel is in low enough light, its voltage can be too low to charge the battery. Low voltage for a 24v panel is still above 12v and the buck converter can use that excess voltage to create amps.
I do the check the batteries voltage at rest thing every morning. Well as long as I get up before first light that is. If I can see well enough to take the dogs out at 5:30, it's probably too late. The system will be awake and reporting less than a amp but still a reading would be off.
What are the panels? The answer can be there too.