RV.Net Open Roads Forum: New RV USB plugs, what amperage are they?

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > New RV USB plugs, what amperage are they?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Sponsored By:
Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 01/10/22 08:24am Link  |  Quote  |  Print  |  Notify Moderator

2017 Heartland, the OE USB plug got hot and shorted out charging an Iphone. It's obviously cheap. Haven't tore apart or replaced yet. Suppose a bad connection could be culprit, but something about it is junk.


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29

Gdetrailer

PA

Senior Member

Joined: 01/05/2007

View Profile



Posted: 01/10/22 08:32am Link  |  Quote  |  Print  |  Notify Moderator

No one can really answer your question, you will have to try a test charge to find out unless they have marked the ports as to what they are.

USB1/2 ports specifications by PC standards are limited to .250A and USB chargers typically will be .5A-2.4A with newer "C" ports at 3A.

Most of the USB chargers that are unmarked will be 1A or less, 2A ones many times are marked. Two port chargers often "share" current and unless marked that current is divided between both ports. Some of those may deliver full current only when 1 port is used.

If not marked, assume 1A or less per port until you do a test to see how fast your device charges. If it charges too slow then consider using another USB charger.

EMD360

Arvada, CO

Senior Member

Joined: 01/18/2010

View Profile



Good Sam RV Club Member


Posted: 01/10/22 08:50am Link  |  Quote  |  Print  |  Notify Moderator

Probably an inaccurate way of guessing but I installed a couple of extra USB/12 volt ports and they are rated for 2.1 amps. I have not noticed that these charge faster than the installed USB ports. They are advertised as “fast charging” USB ports.
[image]


2018 Minnie Winnie 25b New to us 3/2021
Former Rental Owners Club #137
2003 Itasca Spirit 22e 2009-2021


wa8yxm

Davison Michigan (East of Flint)

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 01/11/22 04:58am Link  |  Quote  |  Print  |  Notify Moderator

I think the USB "Standard" is 1/2 amp. and many are thus limited..

As you note. Many need 2, 3 or more Some devices will work with lower amps (Cell phones for example) but take longer to charge. (I use plug in adapters when I need speed)


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


Gdetrailer

PA

Senior Member

Joined: 01/05/2007

View Profile



Posted: 01/11/22 06:41am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

I think the USB "Standard" is 1/2 amp. and many are thus limited..

As you note. Many need 2, 3 or more Some devices will work with lower amps (Cell phones for example) but take longer to charge. (I use plug in adapters when I need speed)


Strictly speaking, USB charging was an afterthought and the original intention was to supply a very limited amount of power to devices on those ports for PCs like Keyboard/mouse and as USB became more universally used those current specs were widened.

In the strictest sense of PC USB ports, USB ports were limited to .5A (500Ma), the port then used a internal "hub" to give you multiple USB ports, that .5A was split between all of the hub outputs.

Fast forward a few yrs and newer USB specs allowed for standalone external USB chargers with .5A and then 1.5A and now 2.4A and even 3A all depending on the charger and the chip built into the device you are charging.

All the details you didn't know you wanted to know about USB charging specifications HERE

Generally, most external USB chargers fall into the .5A-2.1A category, some vendors mark the ports, some do not. So the reality is unless marked, assume the minimum of .5A and do a test charge. If the test charge is slower than what you normally see then you have a port that has a lower output. If it is just as quick as your normal charger then it is a higher output than .5A..

Note, it will not hurt your device to charge via a lower amp charger, it just takes a longer time to recharge.

CA Traveler

The Western States

Senior Member

Joined: 01/03/2004

View Profile


Offline
Posted: 01/11/22 09:42am Link  |  Quote  |  Print  |  Notify Moderator

The USB standard and implementation now support Power Density devices that support up to 5A and 48V (240W) for more power. Electronics on each end and a special USB-C cable. Somewhere I read that there is a Apple computer that uses the PD protocol.

In addition data transfer is ramping up - USB4 is 40Gpbs or 4.8GB/s and it uses USB C.

The OP is wanting a RV standard that doesn't exist any more than a home based standard.

I agree with the prior post indicating installed RV ports are likely what's cheap or on hand.


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland

Bob


CA Traveler

The Western States

Senior Member

Joined: 01/03/2004

View Profile


Offline
Posted: 01/11/22 10:00am Link  |  Quote  |  Print  |  Notify Moderator

OP Try this: If there was a USB standard for RVs it would already be obsolete and have to evolve. But a basic USB C port for charging would likely be desirable today.

Even todays USB C connector will likely become obsolete in the future like other connectors.

Learjet

Louisiana

Senior Member

Joined: 02/21/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 01/11/22 10:45am Link  |  Quote  |  Print  |  Notify Moderator

one way to find out https://www.amazon.com/Voltage-Multimete........23109&sprefix=usb+amp%2Caps%2C306&sr=8-8 or

https://www.amazon.com/MakerHawk-Multime........2Bamp%2Bmeter&qid=1641923259&sr=8-7&th=1


2017 Ram Big Horn, DRW Long Box, 4x4, Cummins, Aisin, 3.73
2015 Wildcat 317RL, MoRryde rubber pin box, Titan Disc Brakes, Trojan T105
B&W Ram Companion

Yamaha EF2600c tri-fuel generator
Champion Model 46595- 3000/3500w


TurnThePage

North ID

Senior Member

Joined: 10/08/2003

View Profile


Offline
Posted: 01/11/22 03:54pm Link  |  Quote  |  Print  |  Notify Moderator

OP here.

I wasn't looking for a standard, just tell me what's currently installed.

I've installed plenty of USB ports among many other things in RVs, so that's no big deal.


2015 Ram 1500
2004 Pioneer 18T6

Learjet

Louisiana

Senior Member

Joined: 02/21/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 01/11/22 06:59pm Link  |  Quote  |  Print  |  Notify Moderator

TurnThePage wrote:

OP here.

I wasn't looking for a standard, just tell me what's currently installed.

I've installed plenty of USB ports among many other things in RVs, so that's no big deal.


I think the answer is no one knows...not even the manufacturer...buy the tester if you must know.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > New RV USB plugs, what amperage are they?
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2022 CWI, Inc. © 2022 Good Sam Enterprises, LLC. All Rights Reserved.