wats the best and cheapest way of setting up a duel battery system to run a fridge?
ARB have got a special on at the moment with a thumper seald battery jump starter thing 24amp hour and duel battery cables for it for $400
is this a good deal?
does anyone know how long this should run a 40 engel fridge for?
any help would be much appreciated.
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duel battery setup help.
Moderator: -Scott-
Hmm, I have a Waco fridge and when the compressor cuts in ti is pulling over 2 amps.
Basic maths states that at full charge, at worst case conditions, a 24 amps hour battery will keep my fridge running for 12 hours.
I would take thsi as being optimistic.
I can purchase a 100 amp hour wet cell for $150. Jaycar have a dual battery isolator capable of sinking 80amps for under $50. If you have some basic soldering skills, $200 will give you a dual battery system (oh.. plus the cost of a second battery cage) and a boot more capaity than what the battery you mentioned will give.
The difference in cost will pay (depending on the vehicle) for the battery mount.
I have recently been through the same ordel with my Rodeo. My major issue was the ability to physically put in a second battery under the bonnet. http://www.outerlimits4x4.com/PHP_Modul ... hp?t=33895
http://www.outerlimits4x4.com/PHP_Modul ... hp?t=32407
I feel that a second external battery will always be a pain in the arse as the time you forget to charge it is the time that you need it.
$400 will get you a permanent solution if you look for the right solution and you are handy with a soldering iron and / or a welder to make your own battery cage.
Cheers
Rainsey
Basic maths states that at full charge, at worst case conditions, a 24 amps hour battery will keep my fridge running for 12 hours.
I would take thsi as being optimistic.
I can purchase a 100 amp hour wet cell for $150. Jaycar have a dual battery isolator capable of sinking 80amps for under $50. If you have some basic soldering skills, $200 will give you a dual battery system (oh.. plus the cost of a second battery cage) and a boot more capaity than what the battery you mentioned will give.
The difference in cost will pay (depending on the vehicle) for the battery mount.
I have recently been through the same ordel with my Rodeo. My major issue was the ability to physically put in a second battery under the bonnet. http://www.outerlimits4x4.com/PHP_Modul ... hp?t=33895
http://www.outerlimits4x4.com/PHP_Modul ... hp?t=32407
I feel that a second external battery will always be a pain in the arse as the time you forget to charge it is the time that you need it.
$400 will get you a permanent solution if you look for the right solution and you are handy with a soldering iron and / or a welder to make your own battery cage.
Cheers
Rainsey
In reality the Jaycar kit will only supply a max current of around 30 amps- down to around 2.5A if the aux is below 10.5V IIRC? The MOSFETs they use are capable of handling a lot more, but the circuit design sets the limits.
The current is limited when the aux voltage is low to prevent battery damage (mainly for deep cycles.)
The current is limited when the aux voltage is low to prevent battery damage (mainly for deep cycles.)
David
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