So my installation is for a sail boat. There's a lot things like rigging sails etc, that can create shadows on part of the array and this is constantly moving around. Some panels in the array will always be in either total or partial shade.
I've seen a lot of debate online regarding mitigating the effect of shadows on the array. It seems pretty clear that wiring in parallel is key, but a lot of people also seem to be adamant that using more MPPT controllers also improves overall average output significantly. Some will even go as far as to use a controller for every single panel.
However some professionals that I have asked about it think this doesn't make sense.
I'd like to dissolve the mystery and looking for a clear guide on the principles and why, in numbers, do people promote the use of multiple MPPT controllers?
From the comments:
- There are two 120 W panels on the back, where shadows are less of a problem, all on one controller, and I'm adding 8 130 W 110x57 cm flexible panels, where there is always some part in shadow.
- Panels are re-badged Sunpower semi flexible panels, like this.