Well,, just got a great bottle of 33 year old Scotch for my Birthday, My solar buddy came over and we had a great discussion about this thread! Well, it turns out,, Heavy Duty is GOOD! But in reality, I will buy a 110V/30 amp single pole switch and cut power to the HOT side of my meager 200 watt 12V panels.
He explains that I will not loose anything thru the switch, where as that Small little guy switch will loose some! We did shoot around dual pole or single pole,, He asks "Where is the switch"? I say between panels and CC. He tells me my Charge Controller already has fuses inbound and outbound. Tells me to pull a fuse,, But I want simplicity.. Given my situation an regular Home 110v rocker switch will work. But then he went on about some really complex (home or commercial)installations that require extreme shut off switching and phasing!
So when I ask for parameters,, He tells me it all comes down to the wallet,, What and how warm do I want to feel?? What is the minimum and what is the Maximum? He says Minimum,Double amps, and 2/3 Voltage and you will be good.. But if you had an yard of money,, Go Big with handles, flags and blinking lights!! I poured another drink and we moved onto Trailer tire brands!!