I would also expect 11 amps or so.
But if the batteries are nearly full, and they do not need much power, say it is running 13.3 volts measured at the battery, then 7 amps is not a surprise. Especially if the panels are warm or hot. I have 1" air gap between my panels and roof to allow cooling air under them, to keep them cooler and producing more power. As the panels warm up, they produce less power.
My best day collecting power was a cold day at 4,500' elevation, with sun reflecting onto the snow on the roof, and the south facing panels that where tilted about 45 degrees. It was new Victorville CA, just north of LA. I was getting around 8 amps from a pair of 45 watt panels. The batteries where fairly low - say 11.8 volts. This allows the maximum amperage into the battery (that was hungry) because it was cold, a little windy, at maybe most important was a very high altitude.
You get higher isolation at higher elevations. I measured the watts per square meter at Boulevard CA and Lakeside CA within 45 minutes of each other, and at 4,000' I was measuring 960 W/Square meter in January. A hour later at 600' elevation, the reading was around 890 W/Meter.
By holding the meter behind the van windshield, it was reading around 500 w/meter, and with the open drivers window, I was getting 900+. So installing a solar panel behind your dual pane tinted windshield will reduce solar isolation by around 40%.
So yes, put a larger load on the batteries, reduce their loaded voltage to around 11.9 or 12.2 volts, and then measure the amperage that the panels are putting out. I think you should have 11 amps when the battery voltage is lower.
Good luck,
Fred.
