Saturday, May 01, 2010 at 08:05
3-ways are good on gas and mains electricity, or off good alternators.
But you can probably forget running off a battery or solar - the money you save on the unit is quickly lost.
After buying my ~40L 12V Peltier (electronic) cooler for $145 (RRP >$250), I was laughing at those that spent over $1,000 more on other fridges.
Sure - it was only down to 20C below ambient, but that was cool (enough).
And even if the electricity ran out, it kept ice at least twice as long as typical eskies (but probably only 1/3 the time of the newer super-eskies).
Than came my 100W solar system. Enough for my 40W - 60W Peltier? No!
So another $500 or more of panels etc to maybe power a 20C below ambient system?
So that's why those people that spend over $1,000 are so stupid! Instead of ~5Amps for 20C below ambient, they PEAK at (say) 2.5A for -20C (maybe 60C below ambient).
So now I'm after a 12V ~40L capacity compressor type fridge. At half the current consumption of my cheap Peltier, it will freeze my own water/ice for transfer to a super-esky every few days. Or it will keep ice-cream in ~45C ambients or higher with maybe as little as 1/10th the current/power consumption of the Peltier.
I know the old 3-way gas types use heat to cool. Gas is great, but electricity is very inefficient for heating and they flatten batteries FAST. Plus they usually cannot be used whilst mobile.
I too looked at the Aldi offering yesterday and was sorely tempted...
But for long-term remote camping etc, ok on gas, but not 12V.
As with many things, it's how you use it.
My Peltier is fine whilst mobile; then I get ice if camping (obviously not too remote!). I wouldn't buy it now for RRP $250. At $145 maybe - but it would simply be a $145 delay for a real 40-45L 12V fridge/freezer.
Best wishes....
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