Waeco Voltage Cut Out

Submitted: Wednesday, Apr 20, 2005 at 08:11
ThreadID: 22216 Views:2729 Replies:5 FollowUps:14
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I have a Waeco CF110 fridge and can't remember the voltage that it will cut out to protect the battery.

Cheers,
Topend
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Reply By: Member - Peter R (QLD) - Wednesday, Apr 20, 2005 at 08:46

Wednesday, Apr 20, 2005 at 08:46
I think its 10.4

Pedro
AnswerID: 107498

Follow Up By: Topend - Wednesday, Apr 20, 2005 at 09:13

Wednesday, Apr 20, 2005 at 09:13
Thanks Peter. The CF110 doesn't have a switch to select different voltage settings like some other Waeco models have.

10.4 volts is a bit low so I might hunt around for a cut out device I can add to the fridge wire.

Topend
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Follow Up By: symes - Thursday, Apr 28, 2005 at 19:41

Thursday, Apr 28, 2005 at 19:41
hi there are you guys talking about your main battery or a deap cycle because inm thinking of buying a 110 as aposed to an engel but battery draw is the think i dont no about any suggestions
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Follow Up By: Member - Peter R (QLD) - Thursday, Apr 28, 2005 at 20:32

Thursday, Apr 28, 2005 at 20:32
G'day Symes,,
I understand the battery draw is about 3 amp per hour, depending on fridge setting.
From a test run it did 24 hours, on my AGM 120 amp and 12 hours later the battery reading was 12.53 .

The beauty of these batteries is that it takes about 2/3 hours for them to recharge throught the alternator.

Only had limited use of waeco so far burt am off to Ballina for a week tomorrow, so will have more of an idea of how it goes , though it will mainly be on mains power.

Pedro

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Follow Up By: symes - Friday, Apr 29, 2005 at 06:47

Friday, Apr 29, 2005 at 06:47
thanks pete looks like i will have to get a bigger battery as i only have 75 deep cycle. although i do have a honda jenny so i could run it off mains i suppose
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Reply By: Member - Peter R (QLD) - Wednesday, Apr 20, 2005 at 09:41

Wednesday, Apr 20, 2005 at 09:41
G'day Topend,
Phoned Waeco , because I also have a CF110 and was concerned the 10.4 was a bit low.

They confirmed that 10.4 was the setting however, this setting could be adjusted by one of their service people

Their phone number is 1800212121
or you can find the list here

Let me know how you go please.

Pedro
AnswerID: 107505

Follow Up By: Topend - Wednesday, Apr 20, 2005 at 12:21

Wednesday, Apr 20, 2005 at 12:21
Thanks Peter. That's a great help. I will contact them to see if this can be done in Darwin.

Cheers,
Topend
0
FollowupID: 364412

Reply By: brett - Wednesday, Apr 20, 2005 at 13:43

Wednesday, Apr 20, 2005 at 13:43
10.4V is not too bad as that is under the load of the compressor trying to start up, you'll find the battery at rest will probably be around 11.5V or more. At 10.4V with a load of over 5Amps the battery still has some life in it, just not enough to run the fridge
AnswerID: 107536

Follow Up By: Topend - Wednesday, Apr 20, 2005 at 16:43

Wednesday, Apr 20, 2005 at 16:43
Hi Brett,

Is it enough to prevent premature failure of a battery? Is it enough to start a vehicle if you only have a single battery? I don't know so I would be interested to hear.

I gather there is a relationship between battery voltage and the state of discharge. eg. At 50% discharge, how many volts would the battery show whilst under load/not under load.

At the end of the day I want to know how far I can run a battery down (measuring volts) without causing premature damage.

Cheers,
Topend.
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FollowupID: 364433

Follow Up By: Mainey (WA) - Wednesday, Apr 20, 2005 at 17:55

Wednesday, Apr 20, 2005 at 17:55
My own thoughts are, when the voltage cutout is set at 10.4v it is way too low for the service life of the battery.. don't wory about the fridge the battery is the item you have to look after as it is the item that fails.

If the fridge often goes down to 10.4v then the battery is too low in Amp hours to sustain the fridge and the battery will die an early death due to being discharged well below 50%...

When a fully charged battery is running my fridge it is generally using around O.2v

Check out some "disconnect specifications" of solar controllers, generally they "disconnect" the fridge from the battery system at ~11.7 Volts, now ask yourself ... Why as high as 11.7 v ....IF 10.4v is safe

the answer is also simple:

# 10.4 volt is not safe on a regular basis!

# The solar controller is there only to protect the battery system ..

# Not to allow the fridge to run longer and damage the battery system!!!
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FollowupID: 364449

Follow Up By: brett - Wednesday, Apr 20, 2005 at 21:50

Wednesday, Apr 20, 2005 at 21:50
No it wouldn't have enough power left to start a car, ideally 10.4 is probably a bit low and if taken that low regularly it will affect the life of the battery,once or twice won't hurt it, but the main thing is to get a charge back into them as quick as possible, the longer left standing at a low voltage the more damage is being done.
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FollowupID: 364485

Follow Up By: Sand Man (SA) - Thursday, Apr 21, 2005 at 00:36

Thursday, Apr 21, 2005 at 00:36
Agree with Mainey, 10.4 volts is way too low.

11.75 or 70% discharged is as low as you should go and this, only occasionally.

State of Charge 12 Volt battery
100% 12.7
90% 12.5
80% 12.42
70% 12.32
60% 12.20
50% 12.06
40% 11.9
30% 11.75
20% 11.58
10% 11.31
0 10.5
Bill


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Follow Up By: Topend - Thursday, Apr 21, 2005 at 06:47

Thursday, Apr 21, 2005 at 06:47
Thanks to everyone for their input. I have a volt meter at the fridge plug so until I get the fridge adjusted I will start the car before the battery drops below 12.2 volts.

I will be getting a 125w BP solar panel before the next big trip.

Topend
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FollowupID: 364522

Follow Up By: Mainey (WA) - Thursday, Apr 21, 2005 at 18:25

Thursday, Apr 21, 2005 at 18:25
Topend,
you say you have decided on a BP solar panel, and I am not saying anything at all against them as I use a Solarex panel, which is basicly the same thing, however I'm impressed with the Unisolar panels, and ONLY because of their ability to work in shaded area's, eg; under trees etc.
I have never used one myself, only ever seen the tests done at camping shows in comparison to the usual panels, and if the comparisons are true and honest then they may be worth a look at for comparison purposes.
They do look a bit flimsy compared to BP panels in the actual sheeting material but they would have be made to an accepted standard.
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Follow Up By: TheUndertaker - Thursday, Apr 21, 2005 at 20:32

Thursday, Apr 21, 2005 at 20:32
Mainey ,i just got a 64watt unisolar ,,,, flimsy ,,,no effen way ,,,, but by same token is larger than same wattage bp/solarex ,, will be feild testing this w/end.
0
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Follow Up By: Mainey (WA) - Thursday, Apr 21, 2005 at 21:59

Thursday, Apr 21, 2005 at 21:59
TheUndertaker, I accept the product is of good quality as there are no real problems you hear about, and yes my word 'flimsy' may have been incorrect, as I believe the panel surface may be more 'flexible' than some other panels, I don't believe this is a fault. As I posted, I'm impressed with the Unisolar panel.

Yes, we do need more actual 'testing' of various consumer products, and actual in-use is an excellent method, as in a 'factory test' situation some effects are not as practical as in a real life situation and the figures quoted by manufacturers are at times suspect.
0
FollowupID: 364620

Reply By: Redeye - Wednesday, Apr 20, 2005 at 15:12

Wednesday, Apr 20, 2005 at 15:12
Don't forget that you may drop a volt or so with the wiring from the battery to the fridge when under load. 10 volts at the fridge may be 11 volts at the battery.

Garry
AnswerID: 107548

Follow Up By: Topend - Wednesday, Apr 20, 2005 at 16:33

Wednesday, Apr 20, 2005 at 16:33
You are right if using the standard power outlet. I have fitted a dedicated fridge wire and the voltage drop is about 0.1v.

Topend
0
FollowupID: 364431

Reply By: Sand Man (SA) - Friday, Apr 22, 2005 at 01:57

Friday, Apr 22, 2005 at 01:57
Also a word of caution re voltage measurement.

An accurate battery voltage will only be given after several hours of "rest" since last charging.
Bill


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AnswerID: 107763

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