Lux ac battery controller

QrizB

If your current panels are two rows of eight, in portrait orientation, each row is 7216mm long.

If you were to replace them with 440s in the same orientation, you'd fit six into the same space (6.3 but you can't get 0?3 of a panel).

12 x 440 is 5280, which is only a 10% increase on your current 4800.

(I don't know your roof layout and you might be correct that you could fit 15 up there.)

chainreaction

I was just after the max spot power for each string eg 2150w say. This would then give a rough idea of how much clipping you'd get increasing panel size. If it was 2150, that's 89.6% of installed capacity so max with 8 440w (exc bi facial production) would be 3150, so little or no clipping as long as you can manage your battery capacity to take the solar + 3400w AC export, then you can export batteries later in day.....