I have not had good luck with my upright freezers, failed earlier than I would like... My old chest freezers have outlasted 2 uprights, and they give me a nice flat surface to work on... If you are looking to power them using a small solar array and inverter I would check each one with a kill-a-watt type meter, they should give you the average, the maximum, and the minimum power consumed during the data collection period. I checked all mine for a full week, I do my planning around the maximum. I was surprised at how wide the range was...
In the process of doing the testing now.