Product review (5 stars): Battle Tested A+++
I used this to make a beer fridge for the lake, This worked flawless at lake Powell for our 7 day trip. I dialed in my beer temp to 34 and it ran my Home depot chest style freezer perfect.

Last year i tried a control box from Ebay to run the freezer like a refrigerator, messed with it everyday- froze my keg. Not happy

. This one is the ticket, Lake Powell is a real world test, Temps in the 100's direct sun on the chest freezer and this product held up to the challenge.