How many watts?

    I recently traded for a solar powered Inverter But I know nothing about what it is I've got Its tandem trailer mounted The array is about 5' x 8' with 7 panels and is affixed to a devise which follows the sun, ect. My question is How does one tell the wattage of a panel as I've got.   I was told this thing I traded for is a 7k inverter, How can I tell? That would indicate to me that each panel puts out 1000 watts?? 7x1000=7kw Or is my thinking on the wrong course? anybody out there, I would be grateful for a little infomation, The biggest inverter I could find was only 5500watts and $24k Thanks in advance