I have a Danby in my van, it is energy star rated , I mounted a very small computer whisper fan in the back to circulate the cold air around the cooling plate to give a more uniform temp. A temp sensor and external display to “tune the temp “ in. Also a larger whisper fan in the back facing the compressor so the heat would not transfer into the compartment, these mods raised the efficiency about 30%. If you crank it up it will freeze my food. Spec sheet 1.3A @ 110VAC. $90 Been in the van 5-6 years with no issues.