Sounds like the mfn (BP?) is derating the panel a little. You mentioned up thread it was a 220W?
The data sheet lists 220W as rated for 1000W/M^2; obviously you are not getting 1000W/M^2 solar irradiance in NJ on Feb 8 at low elevation.
The BP 220 is a 1.68M^2 panel, including frame.