Fridge on gas or ehu

wanderer

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Apr 14, 2008
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Someone onsite said to me yesterday that your fridge is more efficient running on gas than ehu its cheaper and is cooler on gas. Is this right has anyone bothered to check ? . I have always used 240v when on hookup / 12v when driving / gas on all other situations. Never given it a thought before
 

Judge Mental

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correct..normally more efficient on gas in hot weather. But how can it be cheaper if elec included in pitch fee. in spain where elec is normally metered, its cheaper to run on gas. (cheaper still if you have refillable LPG bottles)
 

scotjimland

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sorry to disagree Judge.. .. the efficiency is the same on gas as 230v mains.. .but obviously cheaper on mains if the EHU is included in pitch fee and not metered..

If leccy is metered.. run on Gas... it works out cheaper, that was my experience when we were on metered leccy and paying 14p kwh
 

Welsh girl

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Nov 7, 2009
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I have found the drinks to be a lot cooler when we have the fridge running on gas as we have for the last 2 weeks using Aires without ehu.
We have got refillables.
We use the ehu to run fridge though when we have it as we have paid for it so why use our gas?

I agree with Jim though if electric is metered, I didn't realise though that is cheaper to run off gas than metered electric.
I'll have to remember that next time we have metered electric.
 

Judge Mental

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sorry to disagree Judge.. .. the efficiency is the same on gas as 230v mains.. .but obviously cheaper on mains if the EHU is included in pitch fee and not metered..

If leccy is metered.. run on Gas... it works out cheaper, that was my experience when we were on metered leccy and paying 14p kwh
no need to apologise its only opinion;).....All I know is that in hot weather 30-40 deg most fridges we have had, work better on gas, have had to fit extra fans in the past. This can be apparently because on busy sites the supply voltage can drop when demand high. Another factor is how well the fridge installed, and not all installed that well. The fridge in our new van is the best on elec we have ever had, it freezes contents if stat to high. This was discussed elsewhere and its all down to how its installed apparently....
 
Aug 6, 2013
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Most (if not all) van fridges have only one thermostat and that's used when on mains. On gas the manual control is all you have and on 12v - nothing.
 

scotjimland

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This can be apparently because on busy sites the supply voltage can drop when demand high.
fair comment Judge, I have experienced that in Spain when site voltage dropped below 200v and had to switch to LPG

my original post is assuming correct 230v supply and proper installation.
 
Jun 30, 2013
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Our fridge has automatic switching and the default is mains when connected to it. We did use an EHU last year that was very unstable and the fridge decided for itself that it would switch to gas and stay there.
Allan
 
Oct 17, 2014
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It can be way cheaper on gas if you're metered on mains hookup, as we found to our (extortionate) cost on a site in Austria :(
 
Aug 18, 2014
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Mine turns the fridge into a freezer when on mains at home. the gas is not far behind but the 12v struggles just maintaining whatever the other two got temp down too !
mine is old so has a stat for each.:xThumb:
 
Aug 14, 2009
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Spoke to a bloke on a site in Spain about four weeks ago as he was changing gas cylinders.
He told me that the 'van had used a complete 10kgs bottle of propane in four weeks used exclusively for powering the large fridge in his unit.
That cost him €20. I don't know how many kilowatts the same fridge would have used if on electricity.
 

Judge Mental

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with my particular 100 litre fridge, I asked this on another forum re using a metered supply V refillable LPG system to run fridge. it clearly worked out that comparing price of LPG V price per kw elec, a lot cheaper for LPG
 

dave newell lvs

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The cooling circuit is the same for all energy sources, the heat energy input is generally about the same across the three (usually somewhere between 100Watts to 170Watts depending on fridge size and type. All the energy source does (whichever is used) is heat the liquid in the cooling circuit. As the energy input is generally the same regardless of energy source there can be no significant difference in performance.

As for thermostats most modern fridges, especially auto energy selection units, will regulate temperature on all energy sources. Only the older types with manual energy selection and gas control regulated by adjusting the flame had one thermostat which only worked on mains.

D.
 
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