Product review (4 stars): It basically was working like a fridge instead of a freezer
Got the largest size Sundanzer freezer about 2 years ago. Setup was a breeze. Used a 12 v solar battery with 2- 130w solar panels for.charging the battery.  Freezer worked from the get go but was not freezing. It basically was working like a fridge instead of a freezer. Even with the thermostat turned up all the way. As such, the inside temperature could not go below 5 degree centigrade.  My wife who had little faith of the idea of a solar freeze replacing a normal freezer mocked my wasted money. Not to be deterred, I got in touch with Sundanzer. They stood by their product, after confirming tgeserial.number of the thermostat,  they apologized that there was an obvious factory error as the installed thermostat was for fridges and not freezers. They immediately mailed me the correct thermostat at no cost and without even confirming my receipt or place of purchase. That's what I call standing by your product. Freezer is working like a charm now. Even if there is no sunlight for 3 days, the single 200AH 12 solar battery continues to power the freezer. What a peace of mind purchase. I highly recommend this product