I have 3 x 130W panels
on my boat
and want to add another panel. The new panel wil be about the same size and nominally 12 V same as existing panels
but will be a different brand.
I've got a pulse width modulated regulator
on the existing panels and it has enough capacity for the extra panel.
Is it ok to just connect the new panel in parallel with the existing panels and run the lot through my existing regulator
or, because this is a different panel, do I need to regulate it separately?