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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Hey Jay – </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I have seen this type of problem before –
but it was with Kohler generators and the old SW series. They use a
voltage regulation system which actually increases the AC output voltage along with
the AC load level – they call it “power boost” and it is
intended to offset the voltage drop in the wiring from the generator to the
loads. Usually this is a good feature to have – but under some
situations it can be a problem – such as when the inverter and generator
are close together and the Generator’s AC output voltage is set close to
the limit of the inverter. Maybe the larger Onan’s have a similar system.
</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I think that the CFL lights are making a
difference at very light load levels because they really only draw power for a
very short time from the peak of the waveform – which causes the RMS
voltage to drop. Then as the inverter loads up the generator the voltage
rises again and its dropped. Even though the CFLs are a small total
wattage AC load they draw power in a very brief instant – so they are
more like a 1500 watt AC load which surges on each cycle for just a very brief
instance (less than 1 millisecond usually – depends on the design of the
CFL’s power supply). Often the AC voltage waveform of an unloaded
generator can be extremely non-sinusoidal without any operating.
Unfortunately this requires an oscilloscope to check and even then there is not
much which can be done if it is ugly. </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I would check the AC voltage on the
generator with a hand held true-RMS meter and also with the MATE with the
charger set to “OFF” (via the MATE). I would also increase
the AC Input Maximum Voltage setting to at least 140VAC. Then enable the
charger again and watch the AC input voltage on both the hand held meter and on
the MATE itself. </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>You might be able to have the customer
check the AC input voltage level (with the charger on and off) and adjust the
AC input maximum limit over the phone if that is possible – saving you a
trip to the site perhaps. </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>You also might need to adjust the
calibration of the inverter’s AC input measurement – again this is
done with the MATE in the “CAL” menu section. </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I hope this helps!</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Christopher</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Christopher Freitas</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Director of Research and Development
</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>OutBack Power Systems, Inc.</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><a href="mailto:cfreitas@outbackpower.com"><font
color=black><span style='color:black'>cfreitas@outbackpower.com</span></font></a></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Tel 360 435 6030</span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Cell 360 202 4239</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><font color=black><span style='color:black'>19009 62<sup>nd</sup>
Ave NE</span></font><font color=black><span style='color:black'> </span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><font color=black><span style='color:black'>Arlington</span></font><font
color=black><span style='color:black'> </span></font><font color=black><span
style='color:black'>WA</span></font><font color=black><span style='color:black'>
</span></font><font color=black><span style='color:black'>98223</span></font><font
color=black><span style='color:black'> </span></font><font color=black><span
style='color:black'>USA</span></font></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'><a href="http://www.outbackpower.com/"><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>www.outbackpower.com</span></font></a></span></font></p>
<p class=MsoNormal><font size=3 color=navy face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:navy'> </span></font></p>
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