CFX-35W
- Thread starter deadly99
- Start date
Between 1 and 8 hours with no charge inputs.
Greatly depends on the temp differential, full or not, contents pre-chilled or not, how often you open it, ventilation from the condenser, etc.
And of course how large / new / healthy your battery is, how well the alt charges, how big your engine is.
Greatly depends on the temp differential, full or not, contents pre-chilled or not, how often you open it, ventilation from the condenser, etc.
And of course how large / new / healthy your battery is, how well the alt charges, how big your engine is.
rickc
Adventurer
deadly 99: I note you are coming out west soon. You going the extra mile and attending the BC Overland Rally in July? I'd like to see your truck 'in person"; I've followed your mods on other forums.
The answer will depend on how big the house battery is. I recently bought a 105Ah deep cycle battery to power a bigger CFX75DZW and was able to get almost four days (90hrs) from 100% to 22% charge. I ran the fridge in fridge/fridge mode (two compartments), loaded with beer and other stuff with the ambient temperature at around 21C and no cover on the fridge. If you plan to run the smaller fridge in fridge mode, I would expect you to get 5, maybe 6 days out of a similar battery to the 20%ish charge level; it's not good for the battery to go lower. An insulating cover would push that even further.
The answer will depend on how big the house battery is. I recently bought a 105Ah deep cycle battery to power a bigger CFX75DZW and was able to get almost four days (90hrs) from 100% to 22% charge. I ran the fridge in fridge/fridge mode (two compartments), loaded with beer and other stuff with the ambient temperature at around 21C and no cover on the fridge. If you plan to run the smaller fridge in fridge mode, I would expect you to get 5, maybe 6 days out of a similar battery to the 20%ish charge level; it's not good for the battery to go lower. An insulating cover would push that even further.
67cj5
Man On a Mission
Because it cycles on and off like it does a 110 Amp Battery should last 3 or 4 days without having to start the truck so if youre battery is bigger then it could last 4 or 5 days without a hitch,
hope that helps.
J.
No way, unless the ambient air temp is low and the fridge temp setpoint is high, AND the fridge is kept full AND items are well pre-chilled AND there is great venting of heat buildup away from the condenser / electronics AND the lid rarely opened.
And even then may need added insulation.
30-50 AH per 24 hours is "normal" in average conditions, higher is very common, lower is very rare.
For the batt to last it must be quality true deep cycling, and even then rarely dropped below 50% SoC.
So, a 200+AH bank will be barely adequate unless reliable inputs on demand are replacing at least 60-70AH per day.
And even then may need added insulation.
30-50 AH per 24 hours is "normal" in average conditions, higher is very common, lower is very rare.
For the batt to last it must be quality true deep cycling, and even then rarely dropped below 50% SoC.
So, a 200+AH bank will be barely adequate unless reliable inputs on demand are replacing at least 60-70AH per day.
67cj5
Man On a Mission
Rubbish, There is no way will a Waeco or ARB fridges use that many Amps, My ARB 47L uses between 0.621 and 0.779 Amps per hour I have just completed a very long test of over 600 hours on the power consumption of the ARB 47 and some times it only cycles 13 times a day/24 hrs,
watch this video right till the end if you want more proof. this video lists what the CFX 50 uses per 24 hour period.
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67cj5
Man On a Mission
Although I am an Aussie I am in the UK, the fridges should all be the same regarding the power they use,
Directly a person can not say how many Amps they use because Say the fridge runs for 12m 18secs and it's off time is 83m 27 sec, 12.18 = 12.3mins and 83m 27sec = 83.45 minutes so add the 12.3m to the 83 .45 gives you 95.75 minutes which is 1 cycle, the 12.3 dictates how many Amps it has used and the amount of cycles that fits in a 24 hour period tells you how many times it will cycle and you can work out the total run time and the total amount of time it has been stopped for along with the watts used and the Amps right down to 0.0000000001 Amps.
For example the easy way to workout how many times it is cycling is take 24 hours, and convert that to minutes 24hr X 60 = 1440.
Take that 1440 and divide it by your duty cycle, In our case we got, 1440 / 95.75 tells us that machine will cycle 15.0391644908 times a Day/24hr period. Once you have done that then you can work out the power usage,
Hope that helps,
No, it's easy with a reasonably accurate shunt-based AH-counting meter.
Doesn't even need all the BM calculating wrt Peukert, charge efficiency ratios etc as long as you're not trying to track bank SoC.
$60-80 on eBay for a less accurate one, but personally I'd prefer a secondhand Victron BMV.
Doesn't even need all the BM calculating wrt Peukert, charge efficiency ratios etc as long as you're not trying to track bank SoC.
$60-80 on eBay for a less accurate one, but personally I'd prefer a secondhand Victron BMV.
I must be missing something. My ARB 50 and my wife's CFX28 will both happily live through a 2 day weekend without any driving or charging and we are running them in Central Cali at 100 degree plus outside temps. We just run the starting batteries in the cars. Perhaps we are eating battery life, but it hasn't been a noticeable impact.