You have to wonder

Hi Steve

Was it one of these small 32 amp units ?



It will run your fridge for about 15 hours max.

Steve,

it sounds like their deepcycle 35 amp hour battery unit. I picked one up the other day as part of one of their packages. Got the 50 litre fridge, mounting kit, wiring kit, thermal cover and the battery unit for $1050. Battery unit normally sells for about $299. Don't know anything much about it as I haven't bothered to unpack the box. I have seen them though and they have a digital voltmeter, several plug sockets (Merit and cigarette type) as well as pins for plugging in the charger or hooking it line with another battery. You can also connect two of them to form a 70 A/H unit. Very good construction and portable but I doubt whether it would have the grunt to crank over a diesel.

Cheers. Mick.

You need to know the Ampere Hour capacity of the battery, the total load (the total cuurent draw of the frig, lights and anything else that you intend to connect to it and the likely duty cycle of the frig (how long it is going to run in time in a 24 hour period).
As an example the battery capacity might be 80 ah, the frig might draw 5 amps and the duty cycle is 30% (or 8 hours in 24). Multiply 5 x 8 to get 40 (ah) which is the total load in 24 hours (half the battery capacity)
BUT the frig will only run until it reaches the low voltage cutout at about 11 volts so you need to know how much power you can take out of the battery until that 11v point is reached.
In the example above I'd hazard a guess at about a day and a half.

Yeah that looks like it, there is there an older model as I only had a quick look.

Steve.

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