Generally the max current is regardless of voltage , as such most controllers will handle more watts at higher voltage
For example my victron is rated for 30amps , if i run a 12v battery bank my PV max will be 440Watts , but if i run in 24v @ 30 amps i can have upto 890w of PV and so on
the MPT-7210A is 10amps max input or output ,so you’d need to go 48v (13S) bank and run your solar panels in series to give 36v that way you never go above 10amp on the charge controller.
The issue then is getting from 48v back down to the voltage you need for the pump so you’ll need a converter