>Again, look on the back of each module and there you should see a sticker with ratings on it. There should be one that is;
Isc, which stands for Impedence short circuit.
This is the maximum amperage the PV module can make under standard test conditions (stc.)
If all ten module are the same then multiply the Isc. by ten. Then add 156% to that figure, this is done because of whats know as "edge of cloud effect." There are times when the edge of certain clouds can magnify sunlight and cause PV modules to outperform their ratings at stc..
Example - if each module has an Isc. of 3 then all ten together will make 30 amps. Then the 156% will bring that upto 46.8 amps.
Any charge controller rated over 45 amps will do nicely in this example. For example a Trace C60. Since there are ten modules then you will need a combiner box or boxes that have a total of at least ten circuits and rated for at least 46.8 amps.
This is all asuming a 12 vdc nominal system. if it is to be 24 vdc nominal then half the amps and half as many circuits.
Ten 51 watt modules totals 510 watts. On the shortest day of the year (Dec.21) in the Northeast you might see as much as 1,530 watt hours of equivalent full rated charge in one day. Divide that 1,530 by the nominal battery voltage. For example 12 vdc and you get 127.5 amp hours which is 20% of 637.5 amp hours. So a battery bank of at least 640 amp hours at 12 vdc would do nicely. Like the Trojan T-105's.
The inverter should be mounted on the trailer as well. In this way all you have to do is run a UL approved a drop cord to the home. It should be an inverter with a GFCI receptacle.
These figures are all just examples. There are so many varibles to all of what I have written. So dont take these caculations as the final word.
Seek out a qualified electrician near you. See if you can make a trade for his services. Mostly to assist you with sizing and typing the; wire, fuse's, disconnects, and all that will conduct, controll, or condition the electricity. The concern is that the system will at times be unattended and if there is a problem during those time it can protect itself. Check out this link.
http://www.sandia.gov/pv/docs/Design_and_Installation_of_PV_Systems.htm
