question of solar panel by using parallel connection

juz now i try to connect the 2 solar panel with parallel connection,in theory,the output current will be added,& the output voltage is same;but i measure the output voltage oso is added,y like this ?? i'm not use the series connection

You need to add a load to the output. Try connecting a bulb (6v 12v) across the output and then measure it.

Mike.