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davestreck
Member
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# Posted: 6 Jun 2016 18:49 - Edited by: davestreck
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How close do the specs have to be on two different manufacturers' solar panels to allow you to wire them in parallel to the same charge controller?
I have 2 100w mono panels (1 Renogy, 1 WindyNation) that I'd like to connect to a Morningstar (non-MPPT) cc. The specs are:
Panel 1:
Voc 22.1
Isc 5.91
Vmp 18.0
Imp 5.56
Panel 2:
Voc 22.5
Isc 5.75
Vmp 18.9
Imp 5.29
Is this close enough to not matter?
[Needless to say, this is part of a 12v system]
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MtnDon
Member
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# Posted: 6 Jun 2016 19:45
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Rule of thumb =
Connecting in series, the Imp should be within 10%, within 5% is better
Connecting in parallel, the Vmp should be within 10%, within 5% is better
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davestreck
Member
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# Posted: 6 Jun 2016 20:31
Reply
18.0/18.9=0.952
Sounds like I'm good to go.
Thanks much!
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