How long can my battery run my fridg

Submitted: Saturday, Feb 18, 2006 at 10:18
ThreadID: 30901 Views:2647 Replies:8 FollowUps:3
This Thread has been Archived
Yes, the perennial question ! There are so may variables that you just can't give a simple answer - it depends on air temperature, extra fridge insulation, is it in the sun, do you put warm food/beer in it etc.

I've stumbled across some well disguised test results for various fridges at 20 degrees and 30 degrees. However the authors realised how rare and valuable actual test results on fridges are, so the info is encoded. But I have cracked the code. (I may be retired, but I have to keep the brain active)
http://www.airaus.com/airaus/category.jsp?categoryID=49

Here are two examples for Waeco model numbers I recognise.

CCF-40
Temp -Run/24hr - % - watts - Amps - amphrs/24hrs - amphrs
20 5.28hrs 22% 45 3.8 19.8 0.8
30 7.68hrs 32% 45 3.8 28.8 1.2

FF-90
Temp -Run/24hr - % - watts - Amps - amphrs/24hrs - amphrs
20 8.4hrs 35% 65 5.4 45.5 1.9
30 10.8hrs 45% 65 5.4 58.5 2.4

Interesting to see that when temperature increases from 20 to 30 degrees that power consumption goes up by an additional 50%.

Mike

Back Expand Un-Read 0 Moderator

Reply By: Mike DiD - Saturday, Feb 18, 2006 at 10:22

Saturday, Feb 18, 2006 at 10:22
Don't you hate it when the final result looks nothing like the message entry window ! (It deletes multiple spaces)

CCF-40
Temp -Run/24hr - % - watts - Amps - amphrs/24hrs - amphrs
--20---- 5.28hrs-- 22%- 45----- 3.8-------- 19.8----------- 0.8
--30---- 7.68hrs-- 32%- 45----- 3.8-------- 28.8----------- 1.2

FF-90
Temp -Run/24hr - % - watts - Amps - amphrs/24hrs - amphrs
--20---- 8.4hrs-- 35%- 65------- 5.4------- 45.5------------ 1.9
--30--- 10.8hrs-- 45%- 65------- 5.4------- 58.5------------ 2.4

Mike
AnswerID: 155702

Reply By: Alloy c/t - Saturday, Feb 18, 2006 at 10:55

Saturday, Feb 18, 2006 at 10:55
Mike ,must be a slow /boring Sat morning ,or do u realy want a 500 page discourse /reply /argument / theorem ect ect from all "our' fridge/battery experts ,, only thing that matters is that the beer is cold!!
AnswerID: 155704

Follow Up By: Mike DiD - Saturday, Feb 18, 2006 at 17:09

Saturday, Feb 18, 2006 at 17:09
I think that people who use this forum to learn about how to design their systems to keep their beer cold, would appreciate you not wasting their time with useless posts.

Mike
0
FollowupID: 409730

Reply By: Mad Dog (Australia) - Saturday, Feb 18, 2006 at 11:02

Saturday, Feb 18, 2006 at 11:02
here's some more to make the eyes sore


AnswerID: 155706

Follow Up By: Mainey (WA) - Wednesday, Feb 22, 2006 at 13:10

Wednesday, Feb 22, 2006 at 13:10
Ray, yes the eyes are sore L0L
I've increased the size of the picture to assist the vision and it appears to show the fridge never turned off in the first 4 1/2 hours of the test, because the temp lines are straight once the fridge gets down to the required temperature and in some tests it actually states the fridge never turned off for the duration of the test as the fridge was running 100% of the time.

In the top left test the Engel fridge took ~20 mins to get down to +5 from +20 in a cool ambient of only 25 degrees and the fridge never turned off in the following 4 1/2 hours at least.

The temperature variation numbers shown in the Engel MT45F fridge information appears to be showing the wrong (incorrect) numbers, each setting appears to represent very different degrees of variation between each setting number.

Eg; the temperature variation between both positions one and also position five is stated as 3 degrees, position three is unclear to me but appears to be either zero to -1, or it could be zero to -11, therefore position two would be ~6 degree and position four is either 10 or 20 degree?

This information indicates the fridge should be run on position “two” to keep the contents between +5 and zero degrees which is with-in the recommended temperature of the health dept for safe storage of food

(Ummm, and yes beer, L0L)
0
FollowupID: 410535

Reply By: Alloy c/t - Saturday, Feb 18, 2006 at 17:40

Saturday, Feb 18, 2006 at 17:40
A little sensitive today are you Mike ?? not enough bites for your totaly useless post that has been done over and over just in the last week or two ,, anyone can see real results just by monitoring temp of beer [drinkable] x hrs x battery size x recharge capability instead of worrying about how much gas is produced by that part of your body where the sun dont shine.
AnswerID: 155742

Reply By: Alloy c/t - Saturday, Feb 18, 2006 at 17:55

Saturday, Feb 18, 2006 at 17:55
Oh ,and just another point MikeDid ,you asked the QUESTION "how long can my battery run my fridge " Without telling the esteemed members of the forum any details such as type/ make /size ect of your fridge and battery how the --ck are we to give you an answer ????? useless posts ,lol, look in the archives or even just recently on fridge /battery performance and you would see real life /real use figures in real temps posted /replied by myself and others ,.
AnswerID: 155745

Reply By: clayts - Saturday, Feb 18, 2006 at 18:43

Saturday, Feb 18, 2006 at 18:43
Mike

As I think you have the same vehicle NP DID etc.(if ya the same MikeDID paj forum) and probably the same size second battery 55Amp/h. I'm not sure what fridge you have? But I have an engel 40L (silver one with temp gauge) in a draw system.

From my experience when we have been camping in what I would clasify as warn to hot weather (25-35 deg C) The fridge will hold 2 -3 deg C comfortable for about 2 - 3 days (not sure how much longer it would last as we usually have moved on and the battery has been charged). I also have ran it as a freezer in similiar conditions and 2 days was about max without charging.

I'm not up with all the tecko stuff but hope this helps?

Clayts
AnswerID: 155752

Reply By: Pneumatic - Sunday, Feb 19, 2006 at 04:41

Sunday, Feb 19, 2006 at 04:41
Umm new guy here...but...ahhhh...is this web site owned by someone who has bought to many long stocks in Waeco? What is up with all the fridge drama?

Buy short on Waeco and get a inverter/solar pannel and hook it to a REAL 220v mini fridge!!!

im an azz, I can help it :)
AnswerID: 155792

Reply By: Mainey (WA) - Tuesday, Feb 21, 2006 at 18:21

Tuesday, Feb 21, 2006 at 18:21
Affirmatively, I believe "our fridge/battery experts" would agree with Mike DiD.

Bring on some unbiased, polite and pleasant fridge/battery information… please :-)

Forget about the "macho" attitude about keeping the 'beer cold' for just one thread,
think about that other trivial reason the battery/fridge is sometimes used –

Keeping food cold and/or frozen!!
AnswerID: 156299

Follow Up By: Mike DiD - Wednesday, Feb 22, 2006 at 07:32

Wednesday, Feb 22, 2006 at 07:32
When people come across a message that they don't understand, most will ask questions to learn more, or just ignore it and leave.

It's really sad when a person can only reply regularly with sarcasm.

Mike
0
FollowupID: 410488

Sponsored Links

Popular Products (13)