12v charging, powering? - Fiberglass RV


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Old 08-21-2015, 04:15 PM   #1
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12v charging, powering?

We're slowly getting there.

The Northern Tool 35 watt crystalline solar panel just came, along with a charge controller.c
  1. I have a Fantastic fan, floor model, with a car-lighter type plug. We need to make this play with my 12v system... with some other kind of plug.

We need to charge cell phones and laptops. I'd like to install a USB wall plate but am only finding plates powered by shore power. Are there plates which run from the battery?

What kind of plugs can I use to power 12v items, apart from the cigarette lighter?
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Old 08-21-2015, 05:14 PM   #2
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Look on Ebay or Amazon for "12 volt Charging Centers" like this one


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Old 08-21-2015, 05:26 PM   #3
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I like this
+ this

Keeps everything compatible with trailer and the tow vehicle.

I also have 12 Volt chargers for the laptop computers. All plug into the standard cigarette light socket.
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Old 08-21-2015, 06:08 PM   #4
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THANKS!

I found what I needed, I think. Bob, do your USB chargers have varied power? (Does one charge faster than the other?) I was hoping to find a zoomy one...
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Old 08-21-2015, 06:20 PM   #5
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Usually when there is only 1 port it is usually about 2.24 amps, when there are two ports together, one is usually 2.4 amps the other 1.6 amps or so.


What Byron suggested also works just fine, but beware of inexpensive versions at discount stores, auto supply stores and Flea Markets, etc. There have been reports of cheaper ones having poor voltage control and damaging the battery they were charging.


You don't want to be to "Zoomie", that can sometimes damage the devices battery. Even the 120 VAC versions have current limiters that are about the same as the 12 volt variety
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Old 08-22-2015, 01:24 PM   #6
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Bob, is that charging center a simple install? My 16' scamp's previous owner installed an LED strip light on the wall next to the stove. We never use it, so when we started to take it down we saw that it inside/behind it were a huge "knot" of wires. Curious if something like this could be installed there (this is screaming newbie, I know!)
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Old 08-22-2015, 02:31 PM   #7
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For the ham radio gear in my truck I use West Mountain Radio - RIGrunner which has two USB charging ports. For many folks this would be over-kill. It uses Powerpole connectors West Mountain Radio - Powerpole .
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Old 08-22-2015, 04:13 PM   #8
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The "Power Center" is just 2 wires, 12 VDC hot and a ground wire. As I remember it was less than $20 including shipping.
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Old 08-22-2015, 10:09 PM   #9
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Quote:
Originally Posted by Byron Kinnaman View Post
I like this
+ this

Keeps everything compatible with trailer and the tow vehicle.

I also have 12 Volt chargers for the laptop computers. All plug into the standard cigarette light socket.
Byron would you share where you got the 12 v laptop chargers? I have a small inverter that will work but there is loss using that. Thanks, Mike
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Old 08-23-2015, 08:10 AM   #10
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A note on USB charging sockets. The USB has 4 pins 1 & 4 are charging pins and 2&3 are data pins. The resistance or the voltage on these pins are read by the device to determine if it will use it to charge and how much.
The "Chinese" standard is for these data pins to be shorted together or 0 ohms. The device will (if compatible) will draw 1 amp charging.
The same "standard" is 200 ohms (essentially shorted) also draws 1 amp.
The tablets and Apples look for something a little different.
Apple has been working to keep their experience pure for their customers ( this really means more $$ for Apple).



Nowadays the iPhone expects a certain voltage on those two pins to decide how much current to absorb from the charger. Putting a 2.0 V voltage on both the pins the iPhone will absorb about 500 mA, while with 2.8 V on D- and 2.0 V on D+ it will absorb about 1000 mA.

There are different setups for different devices so it is likely that a generic charging port may not work with all of your devices. There are some ports that are switchable that will work with 1 amp, 2.1 amp (or 2.8) both apples and other devices.

Here is one, but no charging specifications other than 2.1 and 1 amp



Unfortunately it is difficult to a 12 volt multi device charging system.
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Old 08-23-2015, 02:21 PM   #11
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Quote:
Originally Posted by redbarron55 View Post

Unfortunately it is difficult to a 12 volt multi device charging system.
Difficult to??? Install???
(thanks for the explanation and link. Wouldn't you know, I have Windows, hubby has Apple!)
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Old 08-23-2015, 02:32 PM   #12
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Sorry...
It is difficult to tell just what you are getting in a USB charging port and what devices they work with.
Apple has their own thing and even though the euro zone requires that a mini usb charge any phone sold there of course Apple figures that doesn't apply to them.
All of the different standards and charging rates mean that there could be a number of nice looking units that won't work correctly with your devices.
Especially in mixed marriages between Apple and android users ( or others)
Just looking at the current capabilities only tells part of the story.
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Old 08-23-2015, 02:32 PM   #13
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Inverter and Converter

Three questions:

1. Do I need an inverter to charge phone and computer from battery?
2. Do I need an inverter to power 12 volt items?
3. If my solar charger is adequate, would my only need for a CONverter be to run 120V items?
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Old 08-23-2015, 03:29 PM   #14
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Perhaps this explanation will answer your first two questions.

And this one should address question # 3.
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