Forums
 FAQHelp  LinksLinks    SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

How to repair charging system?

 
Post new topic   Reply to topic    Forums » Stella Discussion Previous topic :: Next topic  
Author Message
djarcadian
Member


Joined: 26 Jan 2019
Posts: 2
Location: Houston, TX
2013 Genuine Stella

PostPosted: Sat Jan 26, 2019 3:10 pm    Post subject: How to repair charging system? Reply with quote

I tested my battery with a meter and it looks like the charging system isn't working. I already installed a new battery several weeks ago and it's slowly run down and I have to jump it to get it started.

Are there any good guides or videos on how to repair a charging system? I'm hoping it's just a loose wire somewhere. Not too familiar with how the Stella works.

It's a 2013 Genuine Stella.
Back to top
View user's profile Send private message  
tenders
Member


Joined: 03 Dec 2018
Posts: 81

Buddy International 50 Italia

PostPosted: Sat Jan 26, 2019 4:15 pm    Post subject: Reply with quote

It’s probably more accurate to consider the scooter’s power generation capabilities the “operating power source” (rather than the “charging system”) and the battery’s capabilities the “starting source.” Once the engine starts, the headlight, ignition, and other electrical loads take at least 40 watts of power, and quite possibly more depending on the draw of the headlight. This is 3-5 amps and the scooter’s power source is intended to provide this; the battery only does this temporarily. If the scooter’s power system were not working, it is an amount the battery could not sustain all by itself for more than an hour or two.

The power system’s excess capacity to recharge the battery is relatively meager, only generating an amp or two above the running needs to replenish the battery over time from the substantial reserve used up by the starting demand. And it only generates this amount of juice at full throttle.

A truly broken power system will leave the battery with too little juice to start the engine, and once kick- or jump-started, will eventually cause the engine to stall due to a lack of power to the ignition. If the battery takes weeks to run down, it is possible the power system is working as designed, but just isn’t being applied long enough to replenish the battery. This is a very frequent occurrence and is why people use battery tenders.

How long is the scooter being run between starts?

And what are the numbers you’re seeing on the meter? A fully charged, but not charging, battery will be about 12.3V, maybe a bit higher. Then see if that voltage increases once the scooter is started and idling, and again once the scooter has been revved up a bit (on the stand). If you see materially higher voltages after starting, 13V or a bit more, that’s a pretty good indication the power system is working. But if the battery is dead and being charged, the jump might be less. If the jumps is zero, yes, the power system is borked.
Back to top
View user's profile Send private message  
djarcadian
Member


Joined: 26 Jan 2019
Posts: 2
Location: Houston, TX
2013 Genuine Stella

PostPosted: Mon Jan 28, 2019 5:32 pm    Post subject: Reply with quote

My system shows just a little less than 13V when it's running. Maybe 12.7 or in that neighborhood (I'm not in front of it right now) but revving to full throttle only bumps it up to about 13V so very little variation.

I run it about once a weekend but I'll admit that on some weeks I only start it and let it run in neutral to keep it in good operating condition and don't even take it out. Otherwise I rarely get full throttle anyway. The battery did last a couple of months before I started having issues and had to jump it.

If I use a tender I'll probably just have to buy a spare battery and swap them out periodically. Unfortunately there's no outlet to log into where I store it.

Thanks for the advice.
Back to top
View user's profile Send private message  
Stanza
Member


Joined: 29 Jan 2018
Posts: 329
Location: Chicago
Puch Maxi

PostPosted: Mon Jan 28, 2019 6:34 pm    Post subject: Reply with quote

You might be dealing with a voltage regulator problem, or possibly even the charging/lighting circuit from the stator. What voltage (AC) are you getting off the yellow lead from the stator? You can either measure that from the stator leads (on this bike they're to the rear, towards the back of the bike of the HT coil), or at the regulator itself.

On this bike, the lighting circuit is shared with the battery charge circuit, so if someone had installed the wrong bulb, with too high a wattage rating, you might be trying to charge a battery while also trying to drive too hungry a light bulb. Given that it's constantly a low voltage/amperage problem, you can rule out the turn signals, and focus on the headlight and tail light.
Back to top
View user's profile Send private message  
tenders
Member


Joined: 03 Dec 2018
Posts: 81

Buddy International 50 Italia

PostPosted: Mon Jan 28, 2019 7:56 pm    Post subject: Reply with quote

Seems there is a simpler explanation than a lot of failed internal parts: if you’re barely running the scooter, the battery is simply going to wither.

Charging while idling is barely doing anything. Is a small solar panel with a removable Battery Tender-style connection a possibility? These are available for under $50.

You might consider putting a switch onto the headlight so that giant power draw is turned off unless you need it. It may not be legal to drive on two wheels without an illuminated headlight.
Back to top
View user's profile Send private message  
2003stellaDave
Member


Joined: 30 May 2017
Posts: 6


PostPosted: Wed Feb 06, 2019 11:58 pm    Post subject: Reply with quote

Do you have a photo of the regulator that you can post here? It would help to see it.

Do you know for sure that it is the stock regulator?
Back to top
View user's profile Send private message  
Display posts from previous:   
Post new topic   Reply to topic    Forums » Stella Discussion Previous topic :: Next topic  Time: GMT

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  Scootergear designed by riders for riders


Powered by phpBB © 2001, 2005 phpBB Group
All Content Copyright 2007-2011 by Modern Buddy. All Rights Reserved.