Adding another solar panel (1 Viewer)

[karalal]

My current set up has 1 x 100 watt alden solar panel and a alden sps 180 controller.
Could I just add another alden 100 watt panel to the existing controller

 

[funflair]

The sps 180 regulator is designed for 180 watt input so if you stuck another 80 on you would be "bang on" another 100 would take you over, its a risk you would overload it, your choice.

I think I would stick another 100 on and change the controller to a MPPT of adequate capacity

Martin