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Old 11-08-2019, 08:09 AM   #15
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This is what it'll look like..............unless someone throws another great idea at me to protect my system and trailer. Appreciate all the knowledge and advise!Click image for larger version

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Old 11-08-2019, 09:50 AM   #16
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With using a PWM controller, there is no reason to have 2 gauge wire on the controller to battery output If using 4 gauge from the panels.

A PWM controller is just a fast switch that keeps the voltage from going high. There is no increase in output thru it.

With a MPPT controller and series wired panels, the controller convertes the higher voltage to 12 volts and multiplies the amp output.
In a setup like that, the panel wiring can be light gauge ( 10 ), and from the controller to the battery needs to be heavier ( 2 ), to handle the multiplied amps.
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Old 11-08-2019, 11:42 PM   #17
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Quote:
Originally Posted by twinboat View Post
With using a PWM controller, there is no reason to have 2 gauge wire on the controller to battery output If using 4 gauge from the panels.

A PWM controller is just a fast switch that keeps the voltage from going high. There is no increase in output thru it.

With a MPPT controller and series wired panels, the controller convertes the higher voltage to 12 volts and multiplies the amp output.
In a setup like that, the panel wiring can be light gauge ( 10 ), and from the controller to the battery needs to be heavier ( 2 ), to handle the multiplied amps.
Thanks,
I'm wiring for the future. Planning to go with an MPPT in the future. Just too many other projects that need my $$$$. I do believe it makes difference what gauge conductor is run. I'm losing a half volt currently from the controller to the batteries with 8ga wire. Ultimately it will be hooked up with 4 ga. wire to the current PWM controller when I move down closer to the batteries. Then some time down the road I'll get the MPPT in it's place.
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2013 GMC Denali, Duramax, Retiring in 2021
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