have a Yamaha generator as backup for when grid power goes down(which is quite often) can i use this for 2 rigs?  generator engine spec is 5000 to 5500 Watts AC / (6Kva) (25 Amps)

1st rig - 10 x RX5700
2nd rig - 8 x 3060ti 

looked @invertor generators but expensive where i live