Thread: What Cable size to run from a 160w Panel to a MPPT Solar Regulator?

Post up the spec sheet or model for the panel and the charge controller.

Originally Posted by Robmacca

I realise that, but with the Regulator being mounted under the cubby box near the batteries under the seat, so the voltage drop is not a huge factor as the voltage output of the solar panel is a lot higher than 12v so if there is a small voltage drop from panel to MPPT, I don't think will make a big difference, as long as the cable can carry the required current... or unless I'm looking at this in the wrong way...

Correct. Panel output before it gets to the regulator will be well over 12v. 160w panel will be overkill to keep you batteries topped up too, but if you already have it, use. I'd still just go with 4-6mm2

A 160W panel with a half decent MPPT in vague sun for “some” hours a day will keep an Engel running indefinitely

I am certain you could link it with end to end coat hangers, electrical tape and cable ties and keep a battery topped off !!!

I agree with Tim however

No one ever made up a heavy duty Anderson-Anderson extension cable and said
“Geez I wish I went with smaller cable”

Steve

Originally Posted by roverrescue

A 160W panel with a half decent MPPT in vague sun for “some” hours a day will keep an Engel running indefinitely

I am certain you could link it with end to end coat hangers, electrical tape and cable ties and keep a battery topped off !!!

I agree with Tim however

No one ever made up a heavy duty Anderson-Anderson extension cable and said
“Geez I wish I went with smaller cable”

Steve

I understand that but I'm only looking at the wiring from the Anderson Plug up to the MPPT under the Cubby Box. I've already got 12v extension leads that are of a good size.

Hi again Rob and as you are only intending to maintain your batteries during long periods of non use, then even thin cable/wire will do the job.


With that huge panel being used for nothing more than maintaining, then even with light wire, your batteries will be fully charged in less than an hour after the sun rises each day.