Define 'best' and 'home use'. How many hours do you expect to run it and how
much do you want to spend?
The primary issue is the motor. The longest lasting motors by far run at
1800 rpm. The vast majority of the generators you see on the shelves run at
3600 rpm. A diesel will last longer than a gas motor but should be used for
Onan is considered among the best(gas), there are now a variety of small
diesels available from the Japanese such as Kubota. For the 'best' expect to
Its been a few years since I was into it, but Generac is a widely sold cheap
brand. They seem to use a variety of motors. A 7kw will use a different
class of motor than a 5kw and you will pay for it. I understand Briggs &
Stratton has redesigned their motors which were notoriously bad but cheap,
compared to a Honda. Honda I am told has slightly slipped in recent years
using more plastic components. They and the other Japanese manufacturers
have developed a line that uses an inverter to convert 12v to 110v. This is
highly efficient and if they make one that size, I'd buy it in a heartbeat.
It loses the generator and lots of weight but is more expensive than your
standard generic(Generac or Coleman). I have heard very good things about
the Yamaha inverter model.
I *think* 5-7000 watts requires an 8 or 10 hp motor. You should google for
motor feedback, ease of maintenance, reliability, noise, etc. The
alternative energy crowd should be up-to-date. I have a 10kw Honda that has
done well. Far bigger than I need, a 2 cyl, 600+cc motor, but the price was
right. I live off the grid and for solar backup, I have suffered through the
generic brands with the old, noisy, fussy and inefficient but cheap B&S
motors and will never, ever do it again.
Who manufactures the best 5000 to 7000 watt home use generator?