That's because it was wired with a single inverter for the whole string. So it can only generate power based on the weakest panel. Instead you can use micro-in

That's because it was wired with a single inverter for the whole string. So it can only generate power based on the weakest panel. Instead you can use micro-inverters by each panel. Or optimizer's which are dc-dc converters and basically do the same thing. This is very common when you have a chimney, and the shadow from it moves around. I think installations where it's all on a single inverter are not very common - a cloud moving in the sky will mess with the entire array, it's just not a very good way to design it.