Forum Discussion
2oldman
May 04, 2018Explorer II
JimK-NY wrote:Some corrections:
In parallel, the currents are additive and the voltage will be fixed to about 12 volts. ... Shading is the enemy of parallel wiring. If one unit is slightly shaded by something on the roof or by something such as a tree branch, the output of the affected unit drops to essentially zero and the output of the system is greatly decreased. When using series wiring, a shaded panel allows the other panel to charge with system at full output.
Because of the shading issue, I picked series wiring.
The voltage will be higher than 12. It has to be to be able to charge the batteries.
Shading is the enemy of any solar panel, but much more so in series, unless the panels have bypass diodes that actually work.
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