Reply
 
Thread Tools Display Modes
 
Old 09-16-2019, 02:51 PM   #1
Senior Member
 
dokaman's Avatar
 
Join Date: Oct 2014
Location: Vancouver WA
Posts: 234
Garage
LED Flicker w/ Webasto

Hello SMBers,

I have been trying to find a cure for a little issue. When ever the Webasto fires up or shuts off, my overhead LED lights flicker. After testing the voltage, it seems solid. The lights however notice the little fluctuation in voltage and flicker. Seems to not care if I am on battery alone or plugged in and charging. Wire size and connections are all solid and up to spec.


I have two vans that do this. One Econoline with 200 amps of Lithium and one Sprinter with 150 amps of AGM. Both with new batteries and such.


Any ideas?



Thanks
__________________

dokaman is offline   Reply With Quote
Old 09-16-2019, 04:00 PM   #2
Senior Member
 
arctictraveller's Avatar
 
Join Date: Mar 2013
Posts: 2,953
Are you using a dimmer? I just converted the over counter lights to LED's, and the dimmer did weird stuff like flashing on and off, then staying off. I gave up and installed a switch, no more flashing or failure to light. Just a thought.
__________________

__________________
Arctic Traveller
KC6TNI
2001 GTRV
Advanced 4wd
Agile Ride improvement package
www.arctictraveller.com
arctictraveller is offline   Reply With Quote
Old 09-16-2019, 05:08 PM   #3
Senior Member
 
dokaman's Avatar
 
Join Date: Oct 2014
Location: Vancouver WA
Posts: 234
Garage
Quote:
Originally Posted by arctictraveller View Post
Are you using a dimmer? I just converted the over counter lights to LED's, and the dimmer did weird stuff like flashing on and off, then staying off. I gave up and installed a switch, no more flashing or failure to light. Just a thought.
The sprinter has a dimmer but the flicker happened before I installed that. The Econoline is just a switch at the moment.
dokaman is offline   Reply With Quote
Old 09-16-2019, 07:08 PM   #4
Senior Member
 
Scalf77's Avatar
 
Join Date: May 2007
Location: Beaverton, OR
Posts: 1,506
It would most likely be the LED lights themselves. If you are using ones that are normally behind a power supply. The tend to make sure that the filtering is done in the supply. You are probably getting some noise spikes associated with the turning on and off the heater. A water pump is also notorious for flickering led lights.

-greg
__________________
2004 E350 EB V10 E/PH 2WD
Scalf77 is offline   Reply With Quote
Old 09-17-2019, 05:30 AM   #5
Member
 
Join Date: Dec 2015
Posts: 74
If you are checking the voltage with a voltmeter, especially a digital volt meter, you won't see the variations that make "flicker". You need at least an old-school analog meter, or better an oscilloscope to see them. If your Webasto is like my Espar, the glowplug takes tens of amps when active, so there is a LOT of spiky current consumption on it.
You can minimize this by having the Webasto have a nice fat wire going directly to the house battery (through a dedicated fuse at the battery, of course), so that you have the least resistance, and the voltage drop to the Webasto isn't shared with the rest of the house systems. You *might* have luck with one of the very large capacitors from a car stereo place - you know, the capacitors the kidz with the Thunder-Thump3000 stereos use to try to get more phat bass[sic]. However, I haven't tried one, and when I run the numbers on stored energy vs. the energy demand of the heater it doesn't look good.
Wowbagger is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Sportsmobile Registry

Vanny Devito

dick

Campervan

Joerg
Add your Sportsmobile
Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 06:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×