Solar controller selection for existing pannels

Looks like controller is fried.

Those panels are called "nominal 12V". 5*12V panels wired in series with total 450W requires 45A MPPT controller, cost around $400.

There is usually VERY little reason to use multiple 12V panels for total 450W array. 2*250W will be easier to install and easier to wire, not to mention possible loss of performance in old panels.