48V pump connected directly to MPPT

Question--Are you planning on having a 48 volt battery bank? Or trying to use without a battery bank. From your controller link:
So, yes you can connect your pump to a 48 VDC battery bank (wiring should be protected by a Fuse/Circuit breaker rated for cable).

Need to know the pump specifications (current, starting current if pumping against pressure for displacement type pump) and the run time (xxx Watts * y Hours per day) to figure out if your array is sufficient for your needs (location, hours of sun by season, etc.).

Once you know the pump current--You can figure out if the 20 amp (or whatever) 240 VAC (or whatever) plug and socket...

Many people will use twist lock connectors (120/240/etc.) instead so there is no chance of plugging into the wrong outlet (nobody has twist lock plugs around their home).

If you no 240 VAC to accidentally plug into (NEMA 6-15 -- 208-250 VAC @ 15 amps--It will work. Just label the socket and cord end that this is 48 VDC (and get polarity correct for pump/pump rotation).

-Bill

Solar charge controllers, in general, need a working battery to 1) power the CPU, typically around 9 volts minimum and 2) the bank voltage to figure out if 12/24/48 volt battery bank.

An issue is that solar charge controllers are not a "regulated voltage supply". If they are connected to the solar array first, the output voltage will be (effectively) uncontrolled output voltage without a battery bank to buffer the controller's DC output)... And the out put voltage rise high enough to damage the battery side electronics in the solar charge controller (i.e, 72-150 volt solar array input to MPPT controller and 12-48 volt battery bank output and uncontrolled rise to Vpanel input voltage).

So, answer for this MPPT controller is NO, it can ruin your controller and it will not function correctly, or possibly, at all.

Regarding your array, if the Array is Vmp~48-60 volts, and the pump is a universal motor (Brushed motor), you could try directly connecting the solar array to the motor and see what happens.

If the pump motor has some sort of electronics, connecting to the solar array may be a bit iffy (possibly damage electronics in motor).

There are devices called Linear Current Boosters:

https://www.solar-electric.com/sunpumps-solar-pump-controller-pca-60-bls-m2s.html (an example)

They take the solar array power, run it through an MPPT type circuit, and then drive the DC pump motor in an "optimal" manor for the motor (i.e., take high voltage/low current from the array and down convert to low voltage/high current to start the pump turning in "morning light" (vs just stalled with array trying to output 48 volts at 1 amp, vs (example) 12 volts @ 4 amps--DC brushed motors, the torque is mostly proportional to the input current--more current, higher torque).

The issue seems to be is that most LCB are almost as expensive as adding a solar charge controller and "golf cart" battery bank. And with LCBs, they pumps only run when the sun is up (vs a battery bank that can supply home water pressure 24x7 from the sun or battery bank).

-Bill