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For a small project I would like some advise on how to wire cells on a custom built panel.
The installation has 6 panels, custom made (BIPV in roofwindows), 3 panels on each side of the deck. each panel has room for 32 cells. The panels are not in optimal direction towards the sun, and because they are on a boat there will be various shading going on.
Because of this I am thinking of using solaredge Optimizers, their loadsharing solution seems elegant for different panel orientations.
for panel layout I seem to have the choice of either:
option 1: parallel 4x8 cells, Vmpp = 16.8 V
option 2: series 2x18 cells, Vmpp = 33.6 V
Let's say in a given situation the 3 panels on Port side are half shaded by sail / mast. This leads to (assuming that the inverter requires a string voltage of 350V):
option 1 output 518 W, Optimizer output starboard 72 V, port 45 V
option 2 output 398 W, Optimizer output starboard 72 V, port 18 V
From this it seems that wiring the panels parallel gives the best result. the only issue I see is that the transforming ratio for the parallel unshaded panels is twice as high as for the series ones (about 4 vs 2)
Am I overlooking something?
It seems to me that the series panels are a much more common panel layout.
Thanks for your advices!
The installation has 6 panels, custom made (BIPV in roofwindows), 3 panels on each side of the deck. each panel has room for 32 cells. The panels are not in optimal direction towards the sun, and because they are on a boat there will be various shading going on.
Because of this I am thinking of using solaredge Optimizers, their loadsharing solution seems elegant for different panel orientations.
for panel layout I seem to have the choice of either:
option 1: parallel 4x8 cells, Vmpp = 16.8 V
option 2: series 2x18 cells, Vmpp = 33.6 V
Let's say in a given situation the 3 panels on Port side are half shaded by sail / mast. This leads to (assuming that the inverter requires a string voltage of 350V):
option 1 output 518 W, Optimizer output starboard 72 V, port 45 V
option 2 output 398 W, Optimizer output starboard 72 V, port 18 V
From this it seems that wiring the panels parallel gives the best result. the only issue I see is that the transforming ratio for the parallel unshaded panels is twice as high as for the series ones (about 4 vs 2)
Am I overlooking something?
It seems to me that the series panels are a much more common panel layout.
Thanks for your advices!
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