USB charging port - Increase amperage ?
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Lurker
Primavera 150 ABS 2018
Joined: 30 Nov 2019
Posts: 2
Location: Taiwan
Sat Nov 30, 2019 8:34 pm quote
hello, first time posting

can i increase the fuse on my 2018 Primavera so the output of the USB port is higher? it uses a 5amp, but could i say increase it to 10 amp?

Right now the manual says the output is 0.5a and takes forever to charge my phone while riding.


I use the quadlock mount and recently saw they have the USB mount with Quick charge 2.0. thought about trying this instead of the OEM usb charger port.

https://www.quadlockcase.asia/collections/shop-moto/products/usb-charger-motorcycle
Enthusiast
Joined: 14 Aug 2019
Posts: 64
Location: Bermuda
Sat Nov 30, 2019 9:33 pm quote
That is a 5 amp, 12V DC fuse - so itís good for 60 watts. That is a LOT of juice to be pushing through USB cable wires (12 amps at 5V, though some of the newer standards push out more than 5V to increase charging speed).

In other words, you probably donít need to upgrade that fuse. Wait until you blow one first. Knowing what youíre doing with it, you could probably go up to 7.5amps in it if you had to, but I would personally run a bigger, independent wire before I went to a 10 amp fuse on the stock wire.
Veni, Vidi, Posti
LX190, Primavera
Joined: 12 Oct 2007
Posts: 5994
Location: New Zealand
Sat Nov 30, 2019 9:54 pm quote
The current limit is probably USB outlet itself. You need to upgrade that.

Something like
https://www.scooterwest.com/twin-usb-jack-power-source.html
Ossessionato
BV350, Primavera 150, Yamaha Zuma 125
Joined: 06 Jun 2013
Posts: 2887
Location: The Twin Cities of Minneapolis/Saint Paul, Minnesota
Sun Dec 01, 2019 6:14 am quote
znomit wrote:
The current limit is probably USB outlet itself. You need to upgrade that.

Something like
https://www.scooterwest.com/twin-usb-jack-power-source.html
Correct. A larger fuse on the 12 volt input side won't increase the output power. You'll have to replace the USB adapter with a quick charging type.
Enthusiast
Joined: 14 Aug 2019
Posts: 64
Location: Bermuda
Sun Dec 01, 2019 8:34 am quote
I read the question as being whether the fuse needed to be upped in order to accommodate the higher-capacity USB charger that was linked to. Believe the answer is NO because the USB chargerís amperage output is not the same as the 12V DC circuitís amperage input.
Molto Verboso
2018 Vespa GTS 300 ABS- Bianco
Joined: 20 Apr 2013
Posts: 1952
Location: E. KY
Sun Dec 01, 2019 1:45 pm quote
No
Ossessionato
2015 GTS 300 Super (Melody)
Joined: 22 Apr 2015
Posts: 2319
Location: Asbury Park, NJ
Sun Dec 01, 2019 8:41 pm quote
Kantuckid wrote:
No
To elaborate: I like to think of this USB port as a means to maintain a given charge level on my phone, rather than a means to charge an almost-dead battery. Not totally useless at all, jut not a great emergency power-source.
Hooked
2013 GTS 300ie
Joined: 14 Feb 2013
Posts: 494
Location: Winston-Salem, NC
Sun Dec 01, 2019 9:16 pm quote
I think the fuse size is determined by the wire gauge, not the power output. I know thatís the case with (US) house breakers, at least. Doubling the fuse rating could result in melted wires and an electrical fire.
Molto Verboso
2018 Vespa GTS 300 ABS- Bianco
Joined: 20 Apr 2013
Posts: 1952
Location: E. KY
Mon Dec 02, 2019 3:47 am quote
I'm no USB port expert but as they are sold there are, as already stated, the high & low amperage outlets. The one I installed in my left GTS shoulder panel is a dual USB port, one of each output, same fixture, covered by a weather lid along with a weather proof DIN/Powerlet outlet beside it, each wired directly to the battery with one inline fuse.
By "no" I was disagreeing with the original post, repeat saying that the USB is either one type or the other...
Veni, Vidi, Posti
Modded Vespa 2017 GTV 300, BMW 2017 C650GT, Ural 2019 Gear Up
Joined: 21 May 2017
Posts: 5815
Location: Downtown Toronto
Mon Dec 02, 2019 4:59 am quote
amateriat wrote:
Kantuckid wrote:
No
To elaborate: I like to think of this USB port as a means to maintain a given charge level on my phone, rather than a means to charge an almost-dead battery. Not totally useless at all, jut not a great emergency power-source.
Yeah that's how I see it. Handy to keep the phone charged and maybe top it up but that's about it. Actually often I just use mine to charge up my AirPods or the spare Sena SMH5 I have.
Lurker
Primavera 150 ABS 2018
Joined: 30 Nov 2019
Posts: 2
Location: Taiwan
Mon Dec 02, 2019 5:16 am quote
sorry i should remove that link if it confused anyone.

but it was in regards to the original USB port that was factory installed on my scooter.

i just want it be a typical USB wall charger you'd find at home , i believe to be 1 amp.

the one on the vespa is so dang slow. its annoying
Enthusiast
Joined: 14 Aug 2019
Posts: 64
Location: Bermuda
Mon Dec 02, 2019 6:36 am quote
Installing a faster USB outlet/charger in the scooter, one that fits or that can be made to fit, will fix this issue and should not require a larger 12V fuse.

I think a 0.5A USB charging rate in the stock configuration is deplorable for todayís devices, and may not even be sufficient to maintain their charging levels when doing anything useful like navigation. Even 1A is pretty slow. You should be able to find 2.4A outlets pretty easily - that will keep up and replenish battery levels quite nicely.
Molto Verboso
2018 Vespa GTS 300 ABS- Bianco
Joined: 20 Apr 2013
Posts: 1952
Location: E. KY
Mon Dec 02, 2019 6:49 am quote
What took me more time to find was a weatherproof USB with a functional cover-the first one I bought had a plastic hinge and the very 1st flex of the plastic as I opened the pkg the plastic broke. Get one with a spring flap weather cover same as DIN/Powerlets use. Ebay has best source/price on both items.
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