Waeco and solar

Submitted: Tuesday, Apr 11, 2006 at 20:49
ThreadID: 32806 Views:3647 Replies:7 FollowUps:3
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A question for the solar gurus.
I have a BP246SR solar panel ( 46 w) I think.
1. How long roughly do you think a 60 litre waeco on about half will run connected to an exide extreme battery with this solar panel on in full sun?
2. Can I just conect the solar panel and fridge direct to the battery? Its self regalated?
Any info would be great
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Reply By: Member - Ray - Tuesday, Apr 11, 2006 at 21:03

Tuesday, Apr 11, 2006 at 21:03
Tin of worms-----Tin of worms
AnswerID: 166537

Reply By: Steve - Tuesday, Apr 11, 2006 at 21:08

Tuesday, Apr 11, 2006 at 21:08
mate, I'd need to ask you 10 questions before I could give you an answer.

Two to be going on with:

1) Battery capacity?

2) Is it an auxilliary battery charged by the car's alternator?

You're best bet is to use the site's search facility. There's enough there to keep you occupied for hours. Then you'll have some more meaningful questions. You ought to do it even though it is time-consuming. You'll learn a lot from the archives and some of the good chaps on here.

Short answer: maybe 2 days.

AnswerID: 166539

Follow Up By: Hairy - Tuesday, Apr 11, 2006 at 21:13

Tuesday, Apr 11, 2006 at 21:13
I was thinking of throwing in a spare battery in incase I drained the two in the car and was just tossing up if it was worth it. An extra day would be all I was trying to get so it sounds worth throwing it in just to try out.

Thanks Again
FollowupID: 421435

Reply By: Derek from Affordable Batteries & Radiators - Tuesday, Apr 11, 2006 at 21:23

Tuesday, Apr 11, 2006 at 21:23
Hi Hairy

Like the others....

More info,

What size Exide, is is fully charged ?

But take this as a guess. 90 a/h battery, fridge uses +- 50 to 60 amps per day.

Solar gives you 46w = +-3amps x 8 hours max = 24 amp hours.

You are going to fall over really quick !

Regards Derek.
AnswerID: 166542

Reply By: On Patrol - Tuesday, Apr 11, 2006 at 21:48

Tuesday, Apr 11, 2006 at 21:48
Hi Hairy
I have the same fridge as you and sometimes worry about the capacity of my dual battery coping when i dont leave camp for a couple of days. Solution for me was to buy a good "starter pack" fitted with cig lighter outlets, as a back up to the auxilluary battery. This will run the fridge for about 18-24 hours on low. A cost a lot less than a solar panel.
On Patrol.
AnswerID: 166549

Follow Up By: On Patrol - Tuesday, Apr 11, 2006 at 21:53

Tuesday, Apr 11, 2006 at 21:53
PS I can run LED camp lights etc of the pak for days at a time, also hany as a power source if you want to remove fridge from the car for any reason.
FollowupID: 421452

Reply By: TerraFirma - Wednesday, Apr 12, 2006 at 13:28

Wednesday, Apr 12, 2006 at 13:28
I was under the impression that the latest model 40 litre Waeco fridges only draw around 22.5amps per day. Or up 2.2amps at 55 degrees C, which is bloody hot.

This from the mega fridge comparison. I have a 100AH AGM battery and was curious how long it would run the the same Waeco fridge..?

"Among the smaller fridges... the WAECO CF-40 AC was the cheapest unit tested but still had it where it counted, producing a temperature graph that could have been sketched by a metronome and consumed a measly 22.5A over the full 24 hours".

Even at 55°C the energy consumption of the CF-40 AC was a class leading 2.2A per hour meaning more run time out of your battery.
AnswerID: 166653

Reply By: Member - Beatit (QLD) - Wednesday, Apr 12, 2006 at 14:08

Wednesday, Apr 12, 2006 at 14:08
G'day Hairy,

This is such a complex question as you have no doubt already gathered. There are a lot of variables at play when you are running fridges and they determine the final power usage. Your capacity to keep the batteries charged is probably a relevant question and as you have already mentioned that you have a second in the car then maybe start looking at how this is charged.

I have 2 weaco 50's that I run off my 75AH AGM. The battery is charged by the car when driving and a 3 stage charger when stationary. Power for the charger comes from either mains (powered site) or genie (remote camping). A lot of people substitute the genie and 3 stage charger for solar panels but generally need considerably more watts than 46 to run their fridge on a sustainable basis.

Kind regards
AnswerID: 166668

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