Is this converter safe to install?

I installed a 45 when my 30 died. Your wiring should all be going through your fuse panel. All my wiring has 15 amp fuses in the TC. If all your wiring is fused which it should be, no problem. Just because the converter has a higher amp rating does not mean it is going to deliver more amps to a given load. Load current is determined by the resistance of the load which is not changing. The voltage of the new converter will be about the same as the old converter. The same voltage over the same resistance will equal the same current or amps. The output from the converter should have fuses. Mine has a 30 amp fuse on both the positive and negative wire leads from the factory even though it was rated at 45 amps. Check that everything is fused properly and if so, you should be fine.