You are working this problem backwards as most people do when they are starting out with solar. Since you said you want to do this right the first time, I highly suggest that you take an hour and sit down and define your loads. I have learned through painful experience in the past that you cannot skip this step.
You need to know the energy consumption of each device you are planning to plug in to the inverter, how long you intend to run each of those devices per day, and whether any of those devices has any special power needs (pure sine wave, high surge current/inductive load, etc.).
I can already tell that you have too many loads for that small of a solar panel system. During the peak of summer time in a southern US state with near perfect conditions you will produce around 1.2kWh with that suitcase. After factoring in some losses to the inverter and wiring you probably have around 1kWh. That might be enough to power a laptop for an entire day, recharge one smart phone, run a few small box fans for a few hours during the hottest part of the day, and then power a few LED lights at night for a few hours. But if you don't have good conditions (partly cloudy, panels not aimed perfectly all day, etc.) or it isn't the height of summer then you are definitely going to have problems. And that is if you have a large enough battery to hold 1kWh (i.e. not a car battery).