Yes. If you wish to upgrade you solarsystem, but want to use a larger (or smaller) size of panel, it is possible todo so. For instance, if you currently have a 50-watt panel, it is possible toadd a 100-watt panel by connecting them together within the same system.Inversely, the same is possible if you want to add a 50- watt panel to anexisting 100-watt.

       The only limiting factor is the size ofyour solar charge controller. Make sure that the controller is powerful enoughto handle to total output of the solar system. For example, a 7-amp controllercan only handle a maximum charge of 105 watts, so if you are increasing yourtotal output to over 105 watts you will need a larger controller.