3 identical panels + 1 similar panel

DIY
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1

Hi,

I have 3 identical panels and another panel from a different manufacturer. Can I use them together on the same MPPT?

Panels x3
Power: 130 W
Vpmax 17,5 V Voc 22 V
Ipmax 6,9 A Isc 7,6 A
Panel 1
Potencia: 130 W
Vpmax 17,41 V Voc 21,75 V
Ipmax 7,47 A Isc 8,1 A

At first, I’m considering setting up a parallel connection of two series. Can I use this configuration? (Pros and Cons)

Thank you for your help.

2

Try Solar Panel Series & Parallel Calculator - Footprint Hero to estimate potential loss’s

3

Hello, thank you for your response.

All panels wired in SERIES:

  • Max power output: 482.38W

  • Max power voltage (Vmp): 69.91V

  • Max power current (Imp): 6.9A

  • Loss: 2.02%

All panels wired in PARALLEL:

  • Max power output: 490.44W

  • Max power voltage (Vmp): 17.41V

  • Max power current (Imp): 28.17A

  • Loss: 0.38%

All identical panels wired in SERIES, then all series strings wired in PARALLEL:

  • Max power output: 250.18W

  • Max power voltage (Vmp): 17.41V

  • Max power current (Imp): 14.370000000000001A

  • Loss: 49.18%

All identical panels wired in PARALLEL, then all parallel strings wired in SERIES:

  • Max power output: 260.78W

  • Max power voltage (Vmp): 34.91V

  • Max power current (Imp): 7.47A

  • Loss: 47.03%

4

Interesting calculations. That makes sense. I would have expected the series connection to be more efficient. What is the installation? If they are not all pointing the same direction you may gain some efficiency using two separate MPPTs.

5

Due to having 3 of one type and one of another.
I would suggest calculating one of each type first, then putting result for the pair in series back in as a single panel + other pair to get 2s2p results.
As results as posted give strange config for paralel / series configs.