The larger pain in the butt result of drawing down the batteries excessively will be the low battery alarm on the co/gas monitor on your unit. This will immediately wake you up at 3 in the morning and you will endeavor to shut off load to get the voltage up. When not successful you will be starting the generator off the engine battery to get the alarm off. When your neighbors come over to question running the genset during quite hours, you will tell them that it is quieter without the alarm.
pops