You said it blew two 30 amp fuses.... I'm going to take a serious good guess here.
30+30 = 60 and that inverter is likely capable of dang near twice that when it comes to charge current on the batteries... My guess is that you need to make some adjustments in the inverter's command panel.. OR, you need to re-think the wiring.
How my rig is wired
House, including PDI 9180 with wizard---breaker---switch---batteries--fuse--inverter/converter
That fuse, is like 200 (or 300) amps for the inverter I have. (Forget without checking) my inverter can put out 100 amps DC or suck over 200.