I’ve got 6 250 watt solar panels and just want to make sure I’m going to wire them correctly. I want to do two strings of three panels. Can I just use the 3-1 mc4 connectors to make the two strings and then use the 2-1 mc4 connectors so that there’s just two wires going into the charge controller. The panels are a touch over 8 amps each and the charge controller is a Victron 100v 50a Any input would be very helpful.
How to wire 6 panels
- Thread starter Ghfalls
- Start date
sunshine_eggo
Happy Breffast!
3S2P
If the Voc of the 3 panels in series is < 120V, 3S is fine. If these are 72 cell panels with a Voc around 45-50V, 3S is too high, and you should go 2S in most climates. 250W panels rated for about 8 amps sound like 60 cell panels, so 3S is probably fine.
For the 3S, you simply use the panel wires to "chain" them in a string and then connect the two strings with parallel connectors like this:
If the Voc of the 3 panels in series is < 120V, 3S is fine. If these are 72 cell panels with a Voc around 45-50V, 3S is too high, and you should go 2S in most climates. 250W panels rated for about 8 amps sound like 60 cell panels, so 3S is probably fine.
For the 3S, you simply use the panel wires to "chain" them in a string and then connect the two strings with parallel connectors like this:
sunshine_eggo
Happy Breffast!
I'm sorry. I made a mistake.
3S may be too much for the controller. I read 150, not 100.
What is the Voc of your panels?
littleharbor2
Solar Addict
Sounds like the Vmp, not the Voc. Still with a 100 Voc limit a 3s configuratuion wont work. If you haven't bought the controller yet look into a 150 Voc version.
Last edited:
rodrick
Free energy enthusiast
Those panels will have a 37 to 38 voc so 2s would work 2x38=76x1.25=95 volt’s adjusted for temperature
littleharbor2
Solar Addict
Oops! the 2s was a typo on my part. Changed it to save confusion, and yes a 2s configuration will work
This image is pretty helpful, thank you for posting it!
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