Solar Panels

Yes and No
How about a lot more information
What gauge is the wiring to your existing panel?
How long is the run to your charge controller?
What type, model number, amp rating of your charge controller?
What size wiring from charge controller to battery bank?
What size panel do you want to upgrade to?
What is your battery capacity?

Depends on size of your controller, amps Vs wire size. If you have a PWM controller you may be able to switch it out for a more efficient MPPT controller. They claim 30% more efficiency in use of same solar panel.

Need a little more information in order to help you out as answers highly depends on what you have now and what you are trying to do.
What size panel do have now?
What type controller are you using, PWM or MPPT?
What size (amps) controller do you have?
What size panel are you planning to get?
What size wire is your factory wiring?
How much battery capacity to you have?
What are you trying to do with putting a bigger panel on?