I have been using a Goal Zero Extreme 350 with two Boulder 30 panels for 4 years. Mainly, I use the GZ to run a 35 liter ARB fridge while stationary. I charge the GZ while driving using a 220 inverter, while at the same time running the fridge from the 12 v socket so the GZ is most always topped when I stop for the day. It will supply the fridge, set to cool between 5-7 degrees Celsius for almost 2 days without a recharge thru solar or car power. (I have a dual battery set up in case I am stationary longer). It is a very reliable and robust setup, which also doubles as a limited home emergency backup. I have no experience with the Yeti model, but I can vouch for the brand. Most important is what do you want to power? What is your plan to recharge? How long stationary vs. driving? Recharge time with solar vs discharge time from end equipment connected. Always sun or often shade? Hope this helps!