Start Kubota. It Idles at 1,200 RPM the same as load operating speed (tropical climate). 10-minutes later...
WHAM! 400-amps at 28.8 volts.
X amp hour battery bank 12 amperes
Y amp doubled in size 24 amperes
Z amp tripled in size 36 amperes
Wanna let your engine run for 12 amps? 24? 36? The 36 sounds inviting doesn't it? After all when things are shut down and the load appears it's all about amp hours and nothing else.
That's why I elected to go with a 3300 amp hour bank. 2x 12 (24) volt hundred amp hour batteries piddle at 5 amps. Now times that by 33, and how many piddling amps does that add up to. HOLY SNOT! 165! If I charged the Rolls batteries like I charge the Lifeline, I would be whacking them with 3,300 amps (but their charge acceptance limit would inhibit it).
Feeding expensive fuel to maintain a penny ****-game ain't too swift.
When I consume fuel it is for a good reason.
Think about it.
Yes the penalty is purchase expense and weight. How does this factor into the life style? I would love to have a hundred panels feeding those monsters. But the jungle and summer rains thwart any thoughts of it being practical. A halfassed solar system coupled to a halfassed charger and battery bank would satisfy neither winter or summer loads.
I just don't have the patience anymore to dink around with a hundred watt hydrocarbon based charging system no matter if I am running the Kubota, the Lombardini, or the Harbor Freight 2-cycle generator.
Weekend warriors can return home and let 24/7 power compensate for a marginal system. I do not have that luxury. Or money to have a generator or engine run for hours and hours.