Go Back   Horizons Unlimited - The HUBB > 4 wheels > 4WD Overland Tech

4WD Overland Tech GENERIC 4WD / 4 wheel TECH discussions and info that is valid for ALL brands. See brand specific forums.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Visit Matt Savage for VIAIR compressors, Air Lift Helper Springs, Tyre Levers, Chris Scott's Books & DVDs, KC Daylighters, Allisport Intercoolers, Overland Preparation and lots more!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 25 Jul 2005
longroadtrip's Avatar
Registered Users
HUBB regular
 
Join Date: Jun 2004
Location: England
Posts: 36
2nd battery charging

We are planning to fit a second battery to our land rover for our drive through africa. I see you can either spend £40 on a basic diode or £200 on a 'battery management system'. can anyone tell me which is better?
Is it a case that the diode just splits the charge and isolates the batteries and the managment system directs the charge more effectivly?
Thanks
rob


------------------
www.longroadtripnorth.com
__________________
www.longroadtripsouth.com
UK to SA in our 110
Reply With Quote
  #2  
Old 25 Jul 2005
Contributing Member
Veteran HUBBer
 
Join Date: Apr 2001
Location: Leicestershire,UK, or in my Iveco Daily 4x4
Posts: 461
Or a split charge relay at about 20 quid

Or a boat switch at about 40 quid

From memory the diode system create quite a large loss

For cheap battery management systems start your trip in south africa (wonder how much you would save by shipping the vehicle to SA, buying all the gear and then driving back to the UK - probabily enough to pay for the shipping)



------------------
Rich
LR101 300Tdi Ambi 'Tiggurr'
__________________
Rich

Iveco Turbo Daily 4x4 40-10
Ex Owner LR101 300Tdi Ambi 'Tiggurr'
Reply With Quote
  #3  
Old 26 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Feb 2005
Location: Netherlands
Posts: 465
I have 4 batteries (24 volt Toyota) with a "basic" diode block. Works perfectly fine. Solid state, cheap (30 euro), rugged, made for the purpose. The diode block looses 0.7 volt over the diodes causing some warmth but it has cooling fins for that. No worries maintenance free etc. Install and never have to look at it again! All the fancy stuff breaks down.

Cheers,

Noel

[This message has been edited by noel di pietro (edited 25 July 2005).]
Reply With Quote
  #4  
Old 26 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Apr 2001
Location: London (UK)
Posts: 772
Hello Noel,

There's plenty of info on the web about split charging, also on the drawbacks of diode based circuits. Because the diode drops charging current, the battery is never fully charged and works below its full capacity. All it means means is that you carry around a piece of equipment that weights a lot yet doesn't serve its purpose. If that doesn't bother you, fine. If not, I'd recommend more refined solutions. You can find out more here: http://www.hellroaring.com/nodiode.htm

------------------
Roman (UK)
www.overlandcruiser.info
__________________
Roman (UK)
www.overlandcruiser.com
Reply With Quote
  #5  
Old 27 Jul 2005
Robbert's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Sep 2001
Location: Gent, Belgium
Posts: 486
I still prefer a relais that switches as soon is the alternator kicks in (cause I will forget the manual switch).

The diode indeed takes 0.7 volts, what in 12V set up is considerable if you ask me (in a 24V set up that's only 0.35V a battery...)
Reply With Quote
  #6  
Old 27 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Apr 2001
Location: London (UK)
Posts: 772
Robbert,

This is precisely why commercial/utility vehicles are fitted with 24V circuitry. If you take good care of your truck, it may live long enough to be rewired for 48V.

------------------
Roman (UK)
www.overlandcruiser.info
__________________
Roman (UK)
www.overlandcruiser.com
Reply With Quote
  #7  
Old 28 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Dec 2003
Location: Wiltshire,UK
Posts: 254
on my 300Tdi 90 i have twin alternators and twin batteries.

This works perfectly, one battery and alternator runs the vehicle, whist the other does the winch.

this way, if either alternator packs up, i can switch the link switch and join botehr batteries together and carry on.

The only down side is that you can't easily fit anything else on the engine, like AC or air compressors (like i've got waiting in the garage), so i might well be converting to the diode type splitter soon!
Reply With Quote
  #8  
Old 28 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Feb 2005
Location: Netherlands
Posts: 465
Hi Roman,

Theory and practice! I have dual voltage indicators and while the motor is running they always indicate between 28 and 30 Volts charging voltage. Seems enough to me! What is 0.7 V on that! And the TLC only has a 30 Amp alternator! Never had any problem with insufficiently charged batteries. I run a compressor fridge, lights, laptop, 500 watt 24V/220V converter etc. No problemo todo !!

Cheers,

Noel

Reply With Quote
  #9  
Old 29 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: May 2003
Posts: 665
We shipped my Toyota over from the UK last July and within 2 months the Lucas split charge solenoid had packed up and I was unable to get a replacement.

I have since reused the wiring and just installed a simple manual switch to separate the two batteries when I've parked up for the night.

Its simple to close the switch at the end of day vehicle check and open it again in the morning's pre-drive check. Simple.

If you buy any other sort of "device", buy two and the bring the second unit as a spare. It's a real pain in the arse to find both batteries flat in the morning and you're not parked on enough of a slope to bump start the vehicle.

Last edited by Bundubasher; 17 Sep 2013 at 14:34.
Reply With Quote
  #10  
Old 29 Jul 2005
Robbert's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Sep 2001
Location: Gent, Belgium
Posts: 486
@Roman,

On 48V I'd better drive my truck (Lada 2104) electrically. Can get rid of the engin, throw a solar panel (with charge mgt off course) on the roof, and just avoid those winters at +60°N.

Sounds like a good id, but first that trip around the Caspian. I heard petrol is cheap there anyway.

Reply With Quote
  #11  
Old 29 Jul 2005
Registered Users
Veteran HUBBer
 
Join Date: Feb 2005
Location: Netherlands
Posts: 465
That is what I mean, what Bundabasher said! Solenoids are no good, they have moving parts and burn their contacts. A diode block as no moving parts. My diode block can handle 70 amp and the alternator supplies max. 30 amp. So it is heavily oversized and therefore as reliable as the Toyota itself!

cheers,
Noel
Reply With Quote
  #12  
Old 12 Aug 2005
Registered Users
HUBB regular
 
Join Date: Mar 2005
Location: Rotterdam, The Netherlands
Posts: 52
Noel,

Are you sure the alternator on your TLC only produces 30 Amps? The specifications on mine says it is "rated at" 80 Amps. I'm not completely sure whether that means it actually pumps out 80 but it might.
__________________
Cheers!
Michiel.
Reply With Quote
  #13  
Old 13 Aug 2005
Contributing Member
Veteran HUBBer
 
Join Date: Jun 2005
Location: cardigan,wales
Posts: 251
I agree Redhouse,the TLC alternator should be 80 amps as standard(maybe it looks like 30 when covered in muck!).
And Dieseljim's dual alternator setup is really the tops when it comes to reliability and having a backup charging system.If you've got room,i'd certainly reccomend shoe-horning a small Jap alternator in there.If you go along to your local scrappy and have a look at some of the small hatchback Jap cars,you should find a tiny alternator that'll do the job.Don't be put off by how small they are,the rating is usually very good as these cars are designed for lots of short journeys so need to be able to keep their batteries charged.If i had room on my camper i'd have one,but as it's so tight i've rigged up a 40amp relay on a manual switch that's only energized by having the ignition key turned on.That way it does'nt matter if i forget to turn it off! Well it's simple and works,and best bit of all is the cost...£2.10p

------------------
Just going for a short ride on my bike....
__________________
Just going for a short ride on my bike....
Reply With Quote
  #14  
Old 13 Aug 2005
Registered Users
Veteran HUBBer
 
Join Date: Oct 2001
Location: France
Posts: 353
My Iveco has a bank of relays activated by the little wire coming off the alternator that heads off into the dashboard for the charge light. The relays activate things like the spots, aux batteries, fridge, power ampli (before it got nicked)

The system's only weak point seems to be corrosion in the push on connections.

A second alternator looks like a good idea, particularly on 24v vehicles, preferably with an independant drive belt.

For those who only have one accessory mount or one spare groove on the drive pulley, Magnetti Marelli make a few models of alternator with an aircon compressor integrated in the same casing (mounted on the smaller Fiats, Renaults and Citroens)

Happy scrapyard hunting!
Reply With Quote
  #15  
Old 14 Aug 2005
Registered Users
Veteran HUBBer
 
Join Date: Jan 2004
Location: Manchester, UK
Posts: 456
Luke, that sounds like an interesting option - any idea what models to target at the scrappie ?
__________________
Pictures, Mauritania 2011
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
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 On
Pingbacks are On
Refbacks are On


 
 


HU DVD Summer Special!

Now that summer is here, get On the Road! Take 30% off the Achievable Dream - On the Road! 2-DVD set until August 31 only. Get On the Road! Learn the tips to staying healthy, happy and secure on your motorcycle adventure!

Our veteran travellers share their tips (and great stories) for staying healthy, happy and secure on your motorcycle adventure.

"A fantastic, informative and inspirational DVD."

"It's brilliant - thank you very much!"

Check it out at the HU Store! Remember to use Coupon Code 'ONTHEROAD' on your order when you checkout.


Renedian Adventures


Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!


What turns you on to motorcycle travel?


Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!


New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80 G/S motorcycle.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events (22 this year!); we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, the HUBB or to receive the e-zine. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.


Books & DVDs

amazon

All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.


Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!




All times are GMT +1. The time now is 22:28.