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PostPosted: Sat May 12, 2018 10:01 am 
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someone-else wrote:
wine~o wrote:
Thanks for editing your post after I had replied.

As they say on Dragons Den. I'm out.


And I am asking what part am I supposed to have edited?

That was aimed at the OP, not you.

Verwood Handyman

Verwood Handyman


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PostPosted: Sat May 12, 2018 5:58 pm 
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The EU has made rules as to efficiency of 230 volt fridges which are not duel fuel, if the fridge will also work on gas it is exempt, 12/230 volt is not considered as duel fuel, you could get Peltier devices with built in transformer and rectifier, but EU rules stopped them being made.

I have an old one and idea is you cool it before you go out, then swap to 12 volt to keep it cool, however they are that inefficient that one would not normally use one at home, only reason to plug in at home is before putting in a car.

Also when not powered the Peltier device allows the unit to heat up, so where one can't keep power on to them, they come with an alternative lid to keep cool.

WAECO do some 12 volt units that use a motor mainly for medical use that use less power and will keep things cool when power is removed, but looking at £300 not £30.

So some way some how to make sense the unit will need a battery, at 60W then looking at 20 Ah battery to keep cool for 2.5 hours, any less than that then a standard cool box without a Peltier device would work better.

So to run from mains it needs DC but not smooth DC, it does not even need to be well regulated, so a non regulated battery charger 6 amp would do the job, and also recharge the battery. Something like this would do the job. You don't want an automatic one as they will not work without a battery being connected.

This LED driver would also work, but would not recharge the battery.

If you want something to use at home long term you need something like this.

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PostPosted: Mon May 14, 2018 10:35 am 

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i purchased some led panel from removed mod 2
these were 45w and was surprised with the brightness and the difference from the old 60cm fluorescent light fitting. Would recommend upgrading to led!

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PostPosted: Tue May 22, 2018 10:47 pm 
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We have a thing we bought in Halfords that converts 240 volts mains to 12 volts, output from a car cigarette lighter socket. It can supply up to 10 amps DC.
We have used it for cool boxes many times( ours draws about 5-6 amps)12 volt air pumps( for airbeds, paddling pools etc.)
So is there a mains converter thing available? Obviously Yes.

If you want to know how much power your coolbox uses, and there is no rating plate check the 12 volt fuse ( usually found in the 12 volt plug). That'll give you a guide to the maximum. For instance if it only has a 6.3 amp fuse it's not going to be drawing 10 amps is it!

When all you have is a hammer, every problem is a nail.

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