Background:
I have three 605w panels in series that produces roughly 120V peak at 18A (3s1p). They are running on a 150/45 mppt.
The problem:
Early morning, I have a chimney shadow that sweeps over the panels. It covers roughly 1/2 to 3/4 of a single panel during sun rise. This shadow is present for 2 to 3 hours as it runs from panel 1 to 3.
My Question:
Due to limited space, I cannot run 3S2P (total 6).
So can I add one more panel and parrelel it with one panel i.e. 2 panels will work in parallel but still produce the ave voltage of 120V (40v per panel connection) as if I still have three panels.
Effectively, I am trying to mitigate the shadow effect on a single panel by "picking up the slack" with the 4th panel in parallel.
Will the Mppt be ok with it (Two panels produce 18A and the other 2 36A ?
I can add a picture if my explanation is not clear.
I know the internal diode of the panel switches "on" to bypass the shadow PV cells so effectively, their is also a "weak" amp reading from one panel (as the shadow sweeps from one to the next panel).
Happy to hear your thoughts
