Recs for Solar Cut Off Switch?
Looking for help finding some sort of cut off switch that I can mount on the wall inside my coach next to where the charge controller is currently mounted. Side note: I'm pretty much hemmed into p...
Forum Discussion
Reading some articles from Google on this confirms the DC vs AC thing.
I have a couple of questions on the specs of this 12/24 switch, eg:
https://www.princessauto.com/en/detail/12-24v-rotary-battery-master-switch/A-p8437402e
So its says it has a watts rating of 2700w. What does the watts limit have to do with anything? 2700/12= 225 the amps rating, but where is the 2700/24 = 112.5 ?
The 1,000 for 15s is perhaps for inductive loads on and off? I read that switches need to be L or R where L has the huge in-rush current when turned on or off.
And, what does it mean by "polarity" in a switch? This one says it is "positive". (I remember in school they told us that Americans do electricity direction backwards, so would I have to install this the other way around? :) )
I see that I could use my 15a 120v light switch as long as the DC is 15a at no more than 30 volts. Not clear how that fits with gap and speed of switching.
I have a couple of questions on the specs of this 12/24 switch, eg:
https://www.princessauto.com/en/detail/12-24v-rotary-battery-master-switch/A-p8437402e
So its says it has a watts rating of 2700w. What does the watts limit have to do with anything? 2700/12= 225 the amps rating, but where is the 2700/24 = 112.5 ?
The 1,000 for 15s is perhaps for inductive loads on and off? I read that switches need to be L or R where L has the huge in-rush current when turned on or off.
And, what does it mean by "polarity" in a switch? This one says it is "positive". (I remember in school they told us that Americans do electricity direction backwards, so would I have to install this the other way around? :) )
I see that I could use my 15a 120v light switch as long as the DC is 15a at no more than 30 volts. Not clear how that fits with gap and speed of switching.
