No offense, but you're going about this completely backwards.
What you want to do first is determine your consumption
. That is, look at all of the electrical
devices that you will use, for how many hours each day, and calculate how many watt/hours (or amp/hours @ 12 volts) you will normally consume.
Second step is to decide how long you want to be able to go on battery
power alone. Two days? Three days? Maybe only a day, and be willing to run the engine/generator if you get several days of clouds? This is simply a decision you need to make, but you may want to take into account the "normal" cycle of sunny/cloudy days where you are going to be.
Now that you know how much you use, and how long you want to be able to go on batteries alone, you can calculate how large of a battery bank you need. Typically it should be at least twice the number of amp/hours you get by multiplying your daily consumption
times your days on the batteries. Since batteries last longer if they are not too deeply discharged, it wouldn't hurt to make your battery bank three times your daily consumption.
Finally you are ready to size your solar array. You need to replace a minimum of your daily consumption, on average, if you want to be energy independent. Depending on where you are located (how much clear sun you get each day) you can usually take the solar panels' total wattage and divide by 3-5 to get your expected average production in amp/hours. Given system losses, making your solar array 1.5-2 times your daily consumption would not be overkill, and of course you have to account for cloudy days.
Some key points to remember: 1) $1 spent reducing consumption is worth $5 spent increasing production. 2) Solar panels are seriously affected by any shadows that pass across them, so mount them (as much as possible) where they will not be shaded by shrouds, the boom, whatever. 3) The only formula that you need to know is watts = volts X amps. With that, simple grade-school algebra will allow you to make all of the electrical calculations.