On Sep 29, 11:52 am, M Q wrote:
ransley wrote:

...

Honda. The Generac is a 3600 rpm unit with maybe 2-3000 hr life, An
inverter series Honda or yamaha run easy at 1600-1800 rpm can easily
last 10,000 hours, rpm is load dependant unlike what you are looking
at, unless their design has changed.

" ... rpm is load dependent ... "

Should only be slightly. Exactly what do you mean?

Most generators you buy are 1800 or 3600 rpm gas or diesel, under
15000 w or so gas, they are usualy 3600 rpm Honda and Yamaha have an
Inverter series that only run at the rpm needed to generate the power
needed, the generator is built into the motor on the small units. They
also provide clean power or sign wave, safe for all electronics. If
for example you use the Honda 3000w Inverter unit to generate a few
hundred watts it may only run at 900 rpm, this not only saves gas but
increases the life of the motor dramaticly. It is believed that
cutting an engines rpm in half increases its life 400%,at 900 rpm it
could last in theory 100,000 hours. 3600 rpm units last from 300-3000
hrs depending on who made them and how heavily you load them, but
Honda 2000 EU are known to last, some say they have gotten 12000 hrs
from running light loads on campers. The Generac is 3600 rpm even if
it produces no power, the Inverter units probably idle at 5-600 rpm,
keeping an easy load it might only run 1800 rpm and run 15 hrs on a
gallon of gas where the 3600 rpm units operate differently, Hondas
site explains it better and shows the increased fuel efficency of
their Inverter units. They cost maybe 3x that of the competition but
you get what you pay for, alt.energy.homepower is where you will get
better answers from alot of off - grid folks