Originally Posted by captainjay
The generator doesn't have the capacity to charge your house batteries. The 6kw has a very small charging system designed to keep a dedicated start battery charged...
I beg to differ - 6Kw is a significant generator. Without taking too many factors into consideration, let us take 6000W and de-rate by 10% for various losses. 5400W equates to a charging capacity of 450amps at 12V. Depending upon your battery bank size and battery type and charger you most likely won't be able to use all those amps.
If you have the Fischer Panda soft-start system, you can even crank up a Bauer dive compressor (running it is easy once the system is running). The genset will run 3-4 air conditioning units and could cool a 49 foot boat in the tropics (I had a 49DS in the caribbean with a 5Kw Fischer Panda which did the job).