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Dual battery options

Chris B

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My mind was made to installing the National Luna box in the G. I took the dimension and I see that it cannot fit between the two seats nor behind it. I am back to square one. Frontrunner tells me they can install it in the middle box. UNfortunately I liked the idea of being able to remove the battery and to be able to use a bigger one. How did you choose between the two options?
http://pbeproducts.co.za/gallery-vehicles/mercedes-benz-g300-pro/

This one works for me, 100Ah AGM battery, removable and charging up to 40A per hour with alternator protection.

http://pbeproducts.co.za/products/dual-battery-systems/
 
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Alan

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Looks very light duty. @5.5kg you will not run a fridge even for an hour.
All depends what you want to use it for.
 

paulventer

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Apparently runs a 72L fridge for 18 hours - Lithium batteries are much lighter.
According to the link its a 444W-hour pack. Assuming it's 12V, that roughly translates to a 37a/h battery - no way it will run a fridge for 18 hours in real life.

It still looks like a nifty little battery pack though.
 

Boots

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According to the link its a 444W-hour pack. Assuming it's 12V, that roughly translates to a 37a/h battery - no way it will run a fridge for 18 hours in real life.

It still looks like a nifty little battery pack though.
True, but keep in mind that Lithium batteries can be discharged right down to 0% unlike Lead Acid that shouldn't go below 50%
Lithium-ion batteries maintain their voltage throughout the entire discharge cycle.
 
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amzimmy

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True, but keep in mind that Lithium batteries can be discharged right down to 0% unlike Lead Acid that shouldn't go below 50%
Lithium-ion batteries maintain their voltage throughout the entire discharge cycle.
Hmmmm.....Lithium batteries to 0%........ not really true ...... if Lithium batteries are discharged more than 30%they are dead! .... be careful with Lithium batteries especially with LiPo they can create quite a havoc!
 

amzimmy

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Sed, set up in my Prof
I would be careful placing the electrical equipment under the seat well, the first place it will flood if you wade in high water! Just a thought.
I made a sort of safe in that well and once the water tank got overfilled and water got in the compartment, it was empty at the time and after that I lined the well with thick insulating paint, but I will still wrap up all the goodies in plastic just in case. It's just a thought!
 

Boots

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Hmmmm.....Lithium batteries to 0%........ not really true ...... if Lithium batteries are discharged more than 30%they are dead! .... be careful with Lithium batteries especially with LiPo they can create quite a havoc!
Have ordered one and will report back - my feeling is lithium is the future.
It's already in everything from the computer/phone you use to electric vehicles to home power solutions.
 

Gerhard van Rooyen

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My car came with Cole hersee solenoid and charging cables to the load compartment. I traced cables and tested everything. The solenoid is connected to the ignition so when started the alternator charges the second battery. There is a fuse in the switch circuit and I also added a switch to be able to manually switch the solenoid on and off. I added a volt indicator as per Riaan’s which works well.

Should I add a fuse in the charging circuit as well?

Thanks to everyone posting their solutions!

I got the Deltec battery and according to the salesman it is dual purpose.



Sent from my iPhone using Tapatalk
 

Gerhard van Rooyen

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Thanks.

My setup at the moment does not include any intelligent electronics, which means if I am correct the Amps supplied is determined by the volts left in the battery - IE when flat (11V) then there will be a large amount of amps going to the battery and when almost full there will be less amps going to the battery.

this leads to my next question: Am I right in saying that a basic (crude) way of limiting the charge current to the battery would be to install a 20A fuse in the charge + line - this way, when the battery requires more than 20 Amps the fuse will blow and I will know to put the battery on AC trickle chargeer (5/8A) until charged and then put back into car?