Negative ground charge controller?

coolfeet

Mark Keeler
I am buying a 30 amp charge controller on Amazon and gives the options to buy "negative grounded". I am using the charge controller with 2 Renogy 160 watt panels in series.

Do I buy the negative grounded charge controller?

Here is the link to the chare controller product on Amazon.

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coolfeet

Mark Keeler
I ordered the 30 amp standard charge controller. HQST advised that I do not need the negatively grounded charge controller in my situation.
 

dwh

Tail-End Charlie
In charge controllers positve ground or negative ground just refers to how the controller is wired internally.

Positive ground means all the positives are hard wired together and the internal switching happens on the negatives.

Negative ground is the opposite.

It doesn't matter as long as your solar +/- just runs to the charge controller and isn't grounded anywhere else.

If you grounded the battery neg AND the solar neg, then you'd need a neg ground controller.
 

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