Heavy Duty Starter? Heavy Duty Alternator? Conversion to a 2-Battery System?

bonge31 · Post by **bonge31** » Mon Jan 29, 2018 3:13 pm

Hey guys,
I'm also wanting to convert to a Dual Battery System. I'm gonna have some equipment in the back of my Delica ( Fridge, water pump, additional 12v plugs etc)
I wanna fit the two batteries under the seat and I have pretty much 33cm x 27cm available...

I have three options:
1) Put two VARTA BLUE DYNAMIC E24
2) Put one Optima YTS 4.2 has starter and the VARTA has auxiliary
3) Put two Optima

Everything will be linked with the IBS Dual Battery System.
Budget wise the first option is the most interesting for sure but I want something reliable if I'm out for a long trip in the cold or under a burning sun.
The VARTA is a 70ah 630CCA and the Optima is a 55ah 760CCA (-18°C)

Thanks for the answers ;)[img]https://uploads.tapatalk-cdn.com/201801 ... 5c16db.jpg[/img][img]https://uploads.tapatalk-cdn.com/201801 ... cec4d2.jpg[/img]

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sk66 · Post by **sk66** » Fri Feb 02, 2018 2:58 pm

bonge31 wrote:Hey guys,
I'm also wanting to convert to a Dual Battery System. I'm gonna have some equipment in the back of my Delica ( Fridge, water pump, additional 12v plugs etc)
I wanna fit the two batteries under the seat and I have pretty much 33cm x 27cm available...

I have three options:
1) Put two VARTA BLUE DYNAMIC E24
2) Put one Optima YTS 4.2 has starter and the VARTA has auxiliary
3) Put two Optima

Everything will be linked with the IBS Dual Battery System.
Budget wise the first option is the most interesting for sure but I want something reliable if I'm out for a long trip in the cold or under a burning sun.
The VARTA is a 70ah 630CCA and the Optima is a 55ah 760CCA (-18°C)

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Test your charging system... if it charges at less than 14v your only good option is the first. If your battery management system allows for both batteries in parallel for starting you could have 1260CCA when needed with the dual Varta setup. The higher AH rating is also better for running accessories.

bonge31 · Post by **bonge31** » Fri Feb 02, 2018 3:54 pm

Thanks for the answer,
I think that my charging system is under 14V but I'm not sure... The alternator is the OEM one and I have a blue solar mppt 75115 12/24V 115A!
I found a pack of two Hankook XV24MF, double use 80ah and 720 CCA... I think it could be a good option, what do you think?

Sorry I'm still learning so I'm asking a lot of questions...[img]https://uploads.tapatalk-cdn.com/201802 ... 4a926b.jpg[/img][img]https://uploads.tapatalk-cdn.com/201802 ... 99c623.jpg[/img]

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sk66 · Post by **sk66** » Mon Feb 05, 2018 7:16 pm

I don't know anything about those batteries... Do your research to ensure they are fine with lower charge voltages and suitable for engine starting (high current draw).