Had PD9245C charger/converter installed do I need to replace 30amp main battery fuse?

[OregonPerson]

I had a 45 amp Progressive Dynamics 9245C charger/converter installed close to my 2 6volt GC batteries using 4/0 cables to charge my batteries rather than using the 30 amp WFCO charger/converter located toward the rear of the inside cabin.

I never draw my batteries more than 50% before charging.

Since the PD9245C "could" supply 45 amps to charge the batteries do I need to replace the 30 amp main battery blade type fuse connected to the two green wires next to the front junction box on the front frame?? If so what amperage and would I need to use a different holder and larger wiring to the fuse??

So far since the installation and through multiple charges the fuse has not blown.