Will this solar charger work with my solar panel setup?
Wire the panels all in series to get the highest possible voltage to the controller. This will keep your current lower, requiring less wire, and allow the MPPT charger to work more efficiently. If you are charging a 24V battery bank, you need at LEAST 26V but it will operate much better with higher voltages. Just try not to exceed 100V. 6 panels is probably the max you'd want to run. 

The Mobil ra220 panels actually have 2 modules each, and if you're measuring ~9V per panel they are configured in parallel. I'd recommend rewiring them in series for the reasons stated above.