Someone posted a thread some time ago about the possibility of daisy
chaining UPSes and the consensus of opinion was that most UPS' produce
an approximation of the AC sine wave. Hence the next UPS downstream
would kick in prematurely because of the 'poor' quality of the supply
(with the exception of some Liebert UPS' which can produce sine wave
output).

I have a client whose office is in a remote area and he has just been
notified of some major power outages in the next few months. He
already has a substantial APC UPS (because the power in his area is so
flakey), but would like to factor in a generator (ideally diesel as he
is a biodiesel advocate).

Are there any specific details when buying a generator that would
indicate the quality of the AC output? Alternatively is there any way
you could condition the output from a generator so as not to fail the
UPS' input quality criteria?

Many seem to quote forms of automatic voltage regulation, but it's a
big difference powering plant equipment to office equipment.

Any insight gratefully received,
Jason.

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