12 volt 20 amp power supply.. help

[oakinteriors1]

Ok I got this today only no wiring diagram...SUPERNIGHT™ DC 12V 20A Regulated Switching Power Supply AC 110-240V
(This Power Supply Unit "DOES NOT" come with installation instruction, wiring cable, on/off switch, or screws.
Professional installation of qualified electrician is highly recommended.)


Not being an elec. to the left is the AC hook up , What is the, L N, which is + and - ?


And what is the emblem just to the right of that, ground?
I understand there are 3 seprate 12 volt out puts to the right of that, correct...

And all the way to the right it looks like something a tinny philips head would fit in to rotate....
On the box it says output 5V,12V,24V,36V,48V DC

[anon1]

Hi,

I believe that the L is for Line, that is the black wire in the 120 volt AC three wire cable.

The N is Neutral, the white wire.

The symbol is for ground, the green wire.

Yes, the next six connections are the three circuits that you want to provide 12v power to.

[crpngdth2001]

L = Live = Black AC Wire
N = Neutral = White AC Wire
Symbol = AC Ground

COM = Common = DC Ground (-)
+V = Positive Voltage = DC Voltage (+)

Adjustable Pot = Adjust output voltage to desired DC Voltage i.e. 5v, 12v, etc. It will apply across all outputs, they can not be set separately.

[oakinteriors1]

Thanks for the fast reply guys...

[GuitarPhotog]

Please don't use that to charge your battery.

<Chas>

[GerryS]

Please explain why....

[noseoil]

I haven't used this type, but it looks to be a "static" output or simple power supply. For charging a battery, you would need to have a system which "steps" the voltage in increments to bring it up to full charge, then monitor for a trickle charge to maintain voltage. While it might be able to provide voltage for a full charge, it wouldn't be smart enough to "ramp down" when a full charge is established, and could then cook the battery if left plugged in for too long.

[MtnDon]

While it might be able to provide voltage for a full charge....

It might not even do a good charge as a 12 volt battery needs a voltage of around 14.4 volts to recharge in a reasonable time.

This is a simple power supply, a battery substitute. Not a charger.

[GuitarPhotog]

Mt Don and Noseoil answered the question correctly. As Don says, this is a substitute for a battery, not a charger for one. I use one of these in my standy trailer to power 12 VDC accessories because the standy has no battery or permanent 12 VDC wiring.

<Chas>

[GerryS]

Covered well....just saying "don't do it" without an explanation leaves ignorance of why....and the devil is in those details

[oakinteriors1]

Well, I changed out my deep cycle battery charger. I have had it for probably 20 years, used for trolling motor batteries....

[Dale M.]

Don't want to burst any bubbles or poke anyone to hard or rain on their parade, but in the beginnings battery charger where nothing more than a transformer, and rectifier (most likely selenium), and ammeter (and some without) and a thermal circuit breaker.....

All the fancy solid state chargers are relatively new on the scene....

I still have a 30-40 year old, old technology battery charger (as described above)and it does just fine....

Even my new Odysee battery (starved cell) that comes with a owners manual just cautions mainly not to charge over 15 volts or to exceed 40 amps, which is kind of a joke in vehicle as alternator will put out all the amperage a battery will accept till alternator capabilities are maxed out and battery reached its own internal chemical balance.......

Only issue with unit in first post is if its puts out exactly 12.0 volts battery attached to it will never achieve full charge because power supply can not reach the 14-15 volt level battery need to be cone fully (chemically) charged as mentioned previously... But if unit is only expected to power 12 volt devices it will probably be just fine....

Dale

[GerryS]

It amazes me complicated we can make life....a battery in the 70s was simple flooded lead cells...not, heck. It takes a degree in engineering just to buy a charger. I hope the prepper types aren't right about EMP. Enen a simple heating element in an electric stove is backed up by a sensitive computer chip any more.

[Dale M.]

Don't want to burst any bubbles or poke anyone to hard or rain on their parade, but in the beginnings battery charger where nothing more than a transformer, and rectifier (most likely selenium), and ammeter (and some without) and a thermal circuit breaker.....

All the fancy solid state chargers are relatively new on the scene....

I still have a 30-40 year old, old technology battery charger (as described above)and it does just fine....

Even my new Odysee battery (starved cell) that comes with a owners manual just cautions mainly not to charge over 15 volts or to exceed 40 amps, which is kind of a joke in vehicle as alternator will put out all the amperage a battery will accept till alternator capabilities are maxed out and battery reached its own internal chemical balance.......

Only issue with unit in first post is if its puts out exactly 12.0 volts battery attached to it will never achieve full charge because power supply can not reach the 14-15 volt level battery need to be come fully (chemically) charged as mentioned previously... But if unit is only expected to power 12 volt devices it will probably be just fine....

Dale