Re: Fridge 12v or 240V?

"Adrian Stott" <adrian@xxxxxxxx> wrote in message news:bsfkr41m70m3nn2lqbj0mecqcmggsn10qf@xxxxxxxxxx
On Thu, 12 Mar 2009 19:59:39 -0000, "Mike & Krystyna Wooding"
<mikeandkrystyna@xxxxxxxxxxxxxx> wrote:

This overnight running turns out (on our unit at least) to be
more than the running required when the power is switched back on in the
morning.

That seems very unlikely. Wouldn't it violate Newton's Law of
Cooling?

If you take into the account the losses involved in charging the
battery and then using the battery to run the compressor, as compared
to using the output from the alternator directly, then I would be very
surprised to find that leaving the thing on all night did not use
significantly more energy.

Not convinced Adrian. The system uses 50Ah less per day utilising the time switch than without, so we have a net saving.

You need to be aware that our inverter is on 24/7 and we charge the battery system from whichever source is available, engine, generator or shore power. I am not sure what you mean by 'using the output from the alternator directly'?

Mike

--

Mike and Krystyna Wooding
db Janna http://www.janna.org.uk
nb Draco

.

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