I was out in the garage and noticed that the green led in the centre of the inverter is flashing. Say once a second or so. Looks like the blue led arrow is pointing towards, rather than away from the battery (or maybe alternating). I think I noticed it previously, and just tested to see if it would charge slowly, and it seemed perfectly happy to.
Battery is empty, and there's obviously no solar, so it might just be telling me it has nothing useful to do ? No notifications or anything. I'm going to assume it's nothing to worry about unless someone tells me otherwise.

