450 Watt at 5000 rpm.
My SW Voltage is 14.8 Volt, at 5000 rpm.
Meaning a current capacity...
450 / 14.8 = 30.4 Ampere.
It matches pretty well according the main fuse of 30 Ampere.
But of course , it's not done, asking that load from the system.
80 % means 25 Ampere.
The consuming is dependable of the running items.
Example Hand warming.
I guess ...system + lights = 100...120 Watt.
Estimate about 9 Ampere.
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Eddy.