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Old 09-20-2020, 02:39 PM   #1
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3 Panel Connections ?? !!

This is being asked ONLY for discussion, not for any project in my mind!!

Can 3 identical panels be wired in any other way than the usual parallel or series?? Can 2 be done parallel and the 3rd wired in as a series to the output of the others?? OR, can 2 be done series, and the 3rd wired in as a parallel to the output of the of the others??

Controller is open in this question, but obviously would need (recommended!!) to be a MPPT due to voltages possible or expected. Thinking that panels would be usual RV 100w - 200w units. Say 22v/18v typical specs. Again identical.

I'm sure that many will wonder if any bennys from either of these connection methods. Thoughts?????
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Old 09-20-2020, 07:46 PM   #2
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The panels can be wired however you want. If not all in series or all parallel , then the output will be the same as 2 panels.
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Old 09-23-2020, 03:31 PM   #3
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If the panels are identical - then 3 in series or parallel. However, if panels are not identical...

Say a 200watt panel and two 100 watt panels and the volts are the same (say 20 volts, but the amps are half - 9 amps and 4.5 amps, then wire the two 100 watt in parallel together- then connect the bigger panel in series or parallel.

Next example, if the voltages on the big panel is twice the voltage of the smaller ones, then put the smaller ones in series so the voltage matches the big one, then parallel or series connect the big one to the smaller ones.

Any mismatch is basically lost.
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