Inverter Generators? [RE-wrenches]

[Ray Walters]

Hi Travis;

I currently reccomend the Honda EU series  to my customers for backup
power. The low noise coupled with the excellent charge rates with the DR
inverters makes it the hands down choice in the "Cheaper than Kohler"
club.I've got a customer that replaced a 10 Kw Generac with a 3Kw EU series
Honda. Charge current to the batteries is almost 50% higher. I haven't
worked out the fuel efficiency, but you know it is at least double. I
haven't seen the Yamaha.

Ray

At 08:26 PM 5/20/02 -0500, you wrote:
>?...Yeah, that's what I thought when I first noticed them about a year ago. 
>But then I recently had the opportunity use one and was quite impressed with
>it.  Extremely quiet, very smooth and really light weight.  Perhaps you've
>seen the little Honda's with a handle on top?
>
>So I bought one for my self.  A Yamaha 120 v, 2800 watt unit that weighs 58
>lbs.  I went with the Yamaha as it's all metal and if you ever worked with
>my guys you'd know why.   From what I can tell the 2800 watt rating is
>conservative and it appears to have excellent surge power.  Best I can tell,
>it's generating AC which gets sent to a rectifier (or maybe just a series of
>capacitors to create a DC buss) and feeds an inverter which outputs 119-123
>VAC @ 60.00 (that's 60.00 measured with a Fluke 87) cycles no matter what I
>do to it.   What's especially cool about this unit is that it continuously
>varies the RPM with load.  Way more useful than the units with auto idle,
>which don't produce any usable energy until they run back up to full speed. 
>At just a few hundred watts of load it is still idling, producing steady
>a120v @ 60 hz. power.
>
>I was especially curious about what it's output waveform would do to the
>charge rate an inverter so I plugged my Trace Tiger 500 into it.  The
>generator was idling and in just a few seconds, dang if the Tiger didn't
>lock onto it charge at it's max rate.  The generator never changed speed, it
>just kept idling along.  I bet few have ever seen a Tiger charge at it's max
>rate on generator power and I assume the DR would also perform a heck of lot
>better when using this style of generator.    It's so quiet you can have a
>conversation at normal voice within 5' of it.  I power my shop with a SW and
>will soon test the SW's charger with it.
>
>These units are touted to as providing very clean, quiet power and are
>marketed to the RV crowd.  Anybody else played with these?
>
>Travis Creswell
>Ozark Energy Services

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