My Dual Battery Setup - Help Please

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Peter Connan
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Re: My Dual Battery Setup - Help Please

Post by Peter Connan »

Craig Lord wrote:
26 Feb 2020 10:43
I run the national luna 25amp dc/DC charger with a blue nova lithium 100amp hour deep cycle battery in the national luna box. Charges up the battery from 30% to full in just over 3 hours drive. It can also take power from a solar panel. With this I run 2 Waeco CF 50 fridges, on as a freezer and one as the fridge and the rest is used to charge up various things. The battery ran the fridges for 3 full days in a test I did at home, could have gone more but I got over waiting Haha Couldnt be happier with the setup, I've never had an issue with charging. Best advise is spend the bucks on a good battery and DC DC charger. Dont watse time with the solenoid system the DC DC does this for you also.

Edit: the national luna 25 amp DC/DC charger also caters for lithium batteries.

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Can't compare a DC-DC charger with the NL solenoid system. The fact that NL are now selling DC-DC systems shows that even they are aware of the limitations.

Ian, I am not saying they can't work or that they are unreliable if operated carefully.

What I am saying is that they cannot fully charge deep-cycle, lead crystal, AGM or Li-Ion batteries. The car's alternator simply doesn't produce the required voltage.
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petri oosthuizen
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Re: My Dual Battery Setup - Help Please

Post by petri oosthuizen »

I think I'm gonna unplug all necessary plugs so that the Red BH fits into one side of that battery box, and the Grey one in the other.

Then stand WELL away and see what happens.

The explosion cannot be THAT big, and the Trols are tough buggers, the car's body should contain most of the blast impact.

Will keep you Guys posted. Well, probably. :lol: :lol:
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Re: My Dual Battery Setup - Help Please

Post by Peter Connan »

Ja eish, that wiring looks pretty convuluted!

Make sure you have a BIG fire extinguisher handy!
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Re: My Dual Battery Setup - Help Please

Post by Rhett »

Petri something doesn't look 100% to me. Can you confirm where the black wire on the solenoid unit is going to? Should be on the negative terminal on main battery.
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Re: My Dual Battery Setup - Help Please

Post by petri oosthuizen »

Rhett wrote:
27 Feb 2020 10:56
Petri something doesn't look 100% to me. Can you confirm where the black wire on the solenoid unit is going to? Should be on the negative terminal on main battery.
Thanks Rhett and Others...…..I think I'll take Olive to Carel my sparky Pal and ask him to see what's what...…..ek gaan die stand aan die brand steek soos ek myself ken :surprised:
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Re: My Dual Battery Setup - Help Please

Post by Peter Connan »

Ja daai klink na 'n beter plan.
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Re: My Dual Battery Setup - Help Please

Post by Tinus lotz »

IanT wrote:
26 Feb 2020 10:05
Can't agree with you there Peter, I have run the NL system in many vehical for many years and never had a problem with them. Petri that loop looks like a fuse holder between the two BH plugs why it is done like that with so many BH I have no idea
They dont work ...never seen it charge a battery more than 65% go off grid for 2 weeks and then we will talk again mabe if you drive al the time but they are just horrible imho

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petri oosthuizen
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Re: My Dual Battery Setup - Help Please

Post by petri oosthuizen »

Tinus - you right I guess, there are better systems/products available, but ag wat - this will do for us.

I have solar also, and I really MUST have the portability of a battery box, we prefer the fridge outside the vehicle, either in the caravantjie or then the Oztent(s).
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Re: My Dual Battery Setup - Help Please

Post by Tinus lotz »

Ctec speak to Anthony

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Re: My Dual Battery Setup - Help Please

Post by Craig Lord »

[Tinus] They dont work ...never seen it charge a battery more than 65% go off grid for 2 weeks and then we will talk again mabe if you drive al the time but they are just horrible imho
[/quote]

I have the utmost faith in my national luna box with the 25amp DC/DC charger and blue nova deep cycle battery. Charges it up from 30%to full in under 4 hour drive and with the solar panels connected during the day I have endless power. 2 fridges and multiple other 12v things no issues. I think it really depends on the battery you have. Lithium charges way faster than others.. :mytwocents:
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