Hi Joe 

This is a random panel off ebay.

SPECIFICATION:
Maximum Power(Pm): 200Wp                         This a nominal power rating under special test conditions. Not achieved often in the real world, you only get 70-80% of that. 
Open-Circuit Voltage(Voc): 21.42V                  The max voltage produced when not connected and no current used. Important to know for the safety of the regulator life. 
Short-Circuit Current(Isc): 12.22A                   The max current under test conditions with the leads shorted together. Not achieved in the real world. 
Maximum Power Voltage(Vmp): 17.5V           The important voltage produced under test conditions to get max power out of the panel. Use this for comparing panels. 
Maximum Power Current(Imp): 11.43A          The important max current produced under test conditions to get max power from the panel. Use this for comparing panels.

Standard Test Conditions: 1000W/m², AM1.5, 25°C     These are the test conditions used for the panels. In the real world on a caravan roof these do not apply. EG The sun does not always shine as strong as that. It is not always straight above the panel. The temperature is much higher and that is bad for the power output.

Cheers Jaahn

Hi Joe 

Do they have special technology that no one else does ??? who knows. I do not ! Draw your own conclusion.

I looked at some pictures of that item being sold. It looked like they had 48 cells ??? That does not match either.

When I see this BS I am not impressed !

         Now:   AU $486.95

        Free postage;  (thank heavens for that !)

Jaahn