The wine cooler wasn't set to heating was it? Or reverse connected?
And I wrote about this recently - somewhere - but I finally understood why people spent >$1.000 for mobile compressor fridges. In my case, an Engel 40L (and NOT its "W" competitor).
I started with a $145 ~35L Peltier. Though excellent as an esky (unpowered; ice would last 3x longer), it would draw 6-8A and that would only cool to "20C below ambient". I already had ~100W or solar but would need another ~100W which was ~$750 at the time, plus another battery. And all that for a mere 20C cooling for 24 hours assuming sunny days.
Hence my $900 (RRP $1300) Engel 45MT (or whatever) with its max 2.5A draw that would cool to -19C in +45C heat. In practice she draws ~1.25A and for FAR less duration than my Peltier.
My old 38AH AGM battery had no problem powering her for 24 hours.
I once wanted an absorption type aka 3-way cooler thinking that gas was the way to go (before the greenhouse effect became formal LOL). But 3 things have since occurred: LEDs & flouros have replaced gas lighting; solar is economical & viable; and I want cooling whilst mobile. And when it comes to using electricity, the absorptions are shockers. Plus they don't have freezing capabilities of the compressor types.
I had considered modifying the absorption's heater to be solar fired (parabolic mirror etc), but no, the Engel etc wins hands down.
So now I have a 40L compressor fridge which I can use to create ice or chill "Techni Ice" packs that I transfer to a 60L "super" esky where ice lasts 3 days in 40C heat.
Without solar, I merely have to run my engine for maybe 5-10 minutes to charge the fridge battery for another day or 2.