Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 27th May 2011, 07:55   #1
BHPian
 
Rohit26's Avatar
 
Join Date: Aug 2007
Location: Ghaziabad U.P
Posts: 43
Thanked: 0 Times
Default Adding second battery to Safari

Need some insights of other members on following things.

1] I need to add extra battery to my safari so that i can run AC/laptops especially for hours without having fear of draining my start battery.
Is it possible to run AC on battery.
I am planning to add normal EXIDE 150/180 AH battery,will safari Dicor 3.0 135 Ah alternator can bear the load of extra battery after adding battery isolators or ACRs(automatic charging relays).
So that main battery is just for cranking & auxillary battery is for rest of the accessories.No fear of starting then...

2] How robust is safari alternator ? Also planing to build battery case attached to chassis behind rear chamber RHS. Is it ok or give any other location suggestions ?

3] Where can i get fix/install second battery in Delhi region(kashmiri gate etc.).I have tried noida sec-16 useless car market good for nothing.(they didnt heard such things). Where i will get this battery isolators or ACRs etc.

4] How long does it take to charge a battery by safari 135 AH alternator of safari 80 Ah battery ? Or any similar calculations examples...

5] On our farms where electricity goes for weeks , I am planning to charge normal exide inverter batteries by connecting them in series to tractor battery .Is it ok ? will both batteries charge as tractors keeps on running for pumping waters for hours.. Or suggest something else better ? I hope escort powertrac 430 & mahindras tractors do use alternators or still dynamos ?

6] I am planning to install complete fence bullguard on safari that covers lights etc. steel type.. any price guesses ...

7 ] Also planning to install 4 hella 3000 blue or hella 4000 two pointing on roads and two pointing parallel to road for those who doesn't respect/heard of dippers etc. Which one would be better 3000 or 4000 hella .I need bright illuminated road ahead for great distance just like spot light.. Though i have checked dealers on hella website any members can give any guidance to more generous shop(only Delhi/noida region or kashmiri gate etc)
Or members can suggest any other light solution for my conditions.

Also need to buy 12v compressor ,electric kettle/heater,12v 2-3kms search light etc and power inverter of 1kw( i have of 300 watts) is it possible of 1kw. Any shop suggestions.
Rohit26 is offline   Reply With Quote
Old 27th May 2011, 09:45   #2
Senior - BHPian
 
MileCruncher's Avatar
 
Join Date: Jan 2009
Location: Mumbai
Posts: 3,992
Thanked: 356 Times
Default Re: Adding second battery to SAFARI

Are you planning a separate circuitry for the additional accessories or do you just want to loop the battery in parallel circuit as you will need the circuit to be at 12V. But as Current will increase in the circuit, you might want to beef up the fuses but this may end up blowing your other devices. I think the best way would be to go for a slightly higher AH battery than adding another battery. This is what I feel.

Let the experts comment.
MileCruncher is offline   Reply With Quote
Old 27th May 2011, 10:18   #3
BHPian
 
Rohit26's Avatar
 
Join Date: Aug 2007
Location: Ghaziabad U.P
Posts: 43
Thanked: 0 Times
Default Re: Adding second battery to SAFARI

Quote:
Originally Posted by MileCruncher View Post
Are you planning a separate circuitry for the additional accessories or do you just want to loop the battery in parallel circuit as you will need the circuit to be at 12V. But as Current will increase in the circuit, you might want to beef up the fuses but this may end up blowing your other devices. I think the best way would be to go for a slightly higher AH battery than adding another battery. This is what I feel.

Let the experts comment.
No separate circuitry. By using battery isolators/ACRs you can use existing circuitry. As soon as your first main battery gets fully charged ACRs starts charging next battery.

Points to note:
Only one battery charges at a time(First cranking battery.).
Except cranking all accessories uses second battery.
No change in current or voltage etc..

Main purpose is not going for higher rating battery.
As army trucks & higher end cars have dual battery system,so that you can completely drain your auxiliary battery but you will always have power to crank from the main battery.

Last edited by Rohit26 : 27th May 2011 at 10:19. Reason: spellings..
Rohit26 is offline   Reply With Quote
Old 27th May 2011, 11:09   #4
Senior - BHPian
 
Rahulkool's Avatar
 
Join Date: Oct 2007
Location: Chennai
Posts: 1,265
Thanked: 568 Times
Default Re: Adding second battery to SAFARI

First of all i dont think you can run car AC on battery.
Rahulkool is offline   Reply With Quote
Old 27th May 2011, 11:12   #5
Senior - BHPian
 
VW2010's Avatar
 
Join Date: Dec 2010
Location: electricity
Posts: 2,571
Thanked: 2,046 Times
Default Re: Adding second battery to SAFARI

Great thread. I was looking at something for my bullet as well. Wanted to have an additional battery to power my two additional headlights and share load.

I know its not really as ideal as using it in a car or a SUV but still trying to find something out. Do share how you achieve this.
VW2010 is offline   Reply With Quote
Old 27th May 2011, 15:11   #6
GTO
Team-BHP Support
 
GTO's Avatar
 
Join Date: Feb 2004
Location: Bombay
Posts: 47,756
Thanked: 89,393 Times
Default Re: Adding second battery to SAFARI

Here's some related ICE threads that might offer you additional information:

Second battery for Lancer

Capacitor or Second Battery?

Dual Battery Setup
GTO is offline   (1) Thanks Reply With Quote
Old 27th May 2011, 15:27   #7
Distinguished - BHPian
 
Join Date: Jul 2007
Location: MUMBAI
Posts: 3,059
Thanked: 4,659 Times
Default Re: Adding second battery to SAFARI

Dear Rohit26 - you can use 2 batteries in parallel. We use it very regularly in our test vehicles. Just connect both positive terminals together and earth both negative terminals (essentially the batteries are connected in parallel). You will increase the electrical base. There is absolutely no need to do anything to the production alternator, it will charge both batteries together. However, you cannot run the AC on a battery because the AC compressor is driven by the engine.

Best regards,

Behram Dhabhar
DHABHAR.BEHRAM is offline   (4) Thanks Reply With Quote
Old 27th May 2011, 16:51   #8
BHPian
 
ilangop's Avatar
 
Join Date: Jul 2008
Location: Pune/Neyveli
Posts: 913
Thanked: 578 Times
Default Re: Adding second battery to Safari

Rohit,
I think you can get some advantage with low internal resistance deep discharge batteries like optima tubular batteries. You can also accomodate a higher Ah battery in the existing battery tray.
Where do you plan to have the additional battery? Inverter batteries are high energy batteries, which might probably not suit for a high transient current requirements like an automobile. More over some inverter batteries are equipped with a hygrometer on top of the filling cap. This can also add risk of getting snapped off accidentally. You may give a thought about sealed batteries for this purpose.
ilangop is offline   Reply With Quote
Old 27th May 2011, 17:09   #9
Distinguished - BHPian
 
dhanushs's Avatar
 
Join Date: Oct 2009
Location: Bathery/BLR
Posts: 3,446
Thanked: 4,055 Times
Default Re: Adding second battery to SAFARI

Quote:
Originally Posted by DHABHAR.BEHRAM View Post
Dear Rohit26 - you can use 2 batteries in parallel...
Sir, but wont this drain both the batteries at the same time?.

I guess his concern is about draining the batteries with extensive use of accessories. And, he wants a dedicated battery only for cranking, so that however extensively he/others use the electrical accessories, he wont be stuck with a dead battery.
dhanushs is offline   Reply With Quote
Old 27th May 2011, 18:28   #10
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,746
Thanked: 4,338 Times
Default Re: Adding second battery to SAFARI

Quote:
DHABHAR.BEHRAM (Adding second battery to Safari) : .. you can use 2 batteries in parallel. We use it very regularly in our test vehicles.
BD sir, what is the idea behind doing this (in test vehilces) ?

Guess it should be obvious, but both batteries should be of the same capacity ? Do they need to be of the same brand / model ?
condor is online now   Reply With Quote
Old 27th May 2011, 21:47   #11
BHPian
 
Rohit26's Avatar
 
Join Date: Aug 2007
Location: Ghaziabad U.P
Posts: 43
Thanked: 0 Times
Default Re: Adding second battery to SAFARI

Quote:
Originally Posted by dhanushs View Post
Sir, but wont this drain both the batteries at the same time?.

I guess his concern is about draining the batteries with extensive use of accessories. And, he wants a dedicated battery only for cranking, so that however extensively he/others use the electrical accessories, he wont be stuck with a dead battery.
Yes, that's my concern.I want a dedicated battery just for cranking purpose only.
Rohit26 is offline   Reply With Quote
Old 27th May 2011, 21:58   #12
Team-BHP Support
 
bblost's Avatar
 
Join Date: Jul 2007
Location: Hyderabad
Posts: 9,650
Thanked: 6,663 Times
Default Re: Adding second battery to Safari

Why not install a simple amp meter.
When the power goes below a threshold. Stop using the accessories.
bblost is offline   Reply With Quote
Old 28th May 2011, 00:26   #13
BHPian
 
Join Date: Jul 2004
Location: Utopia!
Posts: 577
Thanked: 84 Times
Default Re: Adding second battery to Safari

Are AC's which can run on 12V available?

I understand that the one originally fitted in the vehicle needs its compressor to be driven by the engine.
Digital Vampire is offline   Reply With Quote
Old 28th May 2011, 23:50   #14
Senior - BHPian
 
Join Date: Jul 2008
Location: Bangalore
Posts: 2,035
Thanked: 384 Times
Default Re: Adding second battery to Safari

Quote:
Originally Posted by DHABHAR.BEHRAM View Post
Dear Rohit26 - you can use 2 batteries in parallel. We use it very regularly in our test vehicles. Just connect both positive terminals together and earth both negative terminals (essentially the batteries are connected in parallel). You will increase the electrical base. There is absolutely no need to do anything to the production alternator, it will charge both batteries together. However, you cannot run the AC on a battery because the AC compressor is driven by the engine.

Best regards,

Behram Dhabhar
Good suggestion this was first thing which came to my mind though I have 0 experience in Automobile batteries.

Theoretically you are just doubling the AH of the battery , I think no isolation circuitry is really required, It not matter which battery charges first or second.
amitk26 is offline   Reply With Quote
Old 29th May 2011, 23:18   #15
BHPian
 
Join Date: Dec 2010
Location: Bangalore
Posts: 33
Thanked: 9 Times
Default Re: Adding second battery to Safari

Quote:
Originally Posted by amitk26 View Post
Good suggestion this was first thing which came to my mind though I have 0 experience in Automobile batteries.

Theoretically you are just doubling the AH of the battery , I think no isolation circuitry is really required, It not matter which battery charges first or second.
I thought of the same thing! But, you are increasing the alternator charging current which can be a problem with a stock alternator.

I would suggest to go for isolated electric circuitry if you are going for a separate battery. This would be important to ensure that you dont have loop currents between the batteries!
bzr77k is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing Existing Battery with a Cummins Shakti Truck Battery? condor Technical Stuff 12 25th November 2010 15:29
Battery question - Can I use Indica Spec Battery in Scorpio, or other such swaps? shekharlele Technical Stuff 18 7th September 2010 09:05
Using a battery tender to revive discharged battery xxaarraa Technical Stuff 2 14th May 2008 19:56
Advice on adding a second sub dinu2506 In-Car Entertainment 38 30th March 2008 18:46
My experience with adding a new Battery in my car Sam Kapasi Technical Stuff 18 14th June 2007 14:41


All times are GMT +5.5. The time now is 12:01.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks