Renewable based Electric vehicle charging station
given :

solar plant generating 100kW,  (assuming best case at MPPT )
connected to a boost converter whose output is 500V ( assuming at Vmpt )


What is max load current?

(assuming at max efficiency and max solar input. )
Answer: I (max)  = P/V = 100k/0.5kV  = 200 A
Other info;
This occurs only when the MPPT output charger impedance Zout= 500V/200A= 2.5 Ohms while the battery ESR is unlikely to match.
The MPPT must regulate to MATCH the impedance at all times and then reduce current   when the battery voltage has been reached CV then cutoff .