How to Increase Solar Charge Controller Output Amps
DC motors have a start current 8~12x the rated current, so a SMPS is a bad idea.  If you went direct off the battery, that will support the power you need for some Ah period but you cannot then determine the cutoff current threshold to the battery as it will be also going to the load instead and you may end up drying out the electrolyte with Vch driving the load so your load current, start-stop surges, duration and charge accumulation is no longer balanced with external loads.
The SRNE2440 supports 12V/24V batteries with 40A charge and 20A loads.
You must define your pump motor DCR, Battery specs, regional Solarity power cycles and then a better idea of a direct solution is possible perhaps with soft start ICL's added to motors. Then include all this with a block diagram and power balance list on how you can manage to regulate preventing extended CV durations with external loads and under-voltage protection without the sun.
Otherwise you are limit to 20A loads.
Other REF (TL;DR)
AU EN translated https://www.rvpartsexpress.com.au/mpattachments/file/viewonline/id/64/product_id/1850/
https://lithium-car-battery.3dcartstores.com/assets/images/ML4860%20User%20Manual.pdf
http://www.srnesolar.com/Private/Files/637033792260708743146914845.pdf slow
https://azimuthsolar.ca/wp-content/uploads/2019/05/MC-SERIES-SRNE-MPPT-MANUAL-V1.01.pdf
http://www.srnesolar.com/Private/Files/6370337829631198461661594389.pdf