Portable solar generators are a very popular item but there is a lot of misleading information on the web. The solar generators listed below are some of the better systems that are truly portable. Nobody wants to lug around a 100 pound battery pack.
A common misconception is that a 12 v DC battery (say 100 AH) will run an entire house, not true. In fact, a 100 AH lead acid battery should only be discharged to within 50% of it's capacity, ideally 60%. This leaves only 50 AH available to run a load. The average modern day freezer consume 150-400 watts. At 120 VAC that equates to 3.33 amps (400 w/120 vac = AMPS or P=I*E) if we use the high figure.
Now the bad news. For a 12 v DC battery to produce that same 400 watts it must use 33.33 amps...Yikes! Your freezer will not operate even 2 hours and the copper wire required to handle that amount of current will need to be at least 8 awg wire and have a run of no more than 15 feet.
These are just some of the things to consider when sizing a system. This is not meant to deter you, just putting things in perspective. You truly cannot get something for nothing.