Don't think the biggest solar panel is the best. There are a lot of variables to consider when buying solar panels. You should consider each of these factors when making your decision.
It is always best to install your solar panels where they will get the most sunlight each day. It is important to check regularly for trees that may be overshadowing solar panels due to growth.
Out on a nice three day Runaway camping trip, and checking out the BioLite SolarHome 620. Great for everyday use, or for emergencies.