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Jesse,<br>
Here is one more thing to look at. I have 3 SMA 1800 W inverters on
my house and had a very similar problem when I installed them. They
are very sensitive to AC voltage. Mine would turn off at 128 VAC.
My utility voltage is 125 per leg and because of voltage "drop" in a
log run of wire, it would get over 128 when the inverters were
putting out power. This made it go on and off every 5 minutes. I
changed the parameters through the Sunny WebBox and set the AC
cut-off to 135 and the problem went away.<br>
David<br>
<br>
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<p class="MsoNormal" style=""><span style="font-size: 10pt;
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<br>
On 4/6/2011 4:41 PM, Jesse Dahl wrote:
<blockquote
cite="mid:F62999D5-B531-4A19-852A-D0552D0DFE01@gmail.com"
type="cite">
<pre wrap="">Wrenches,
I've been working on a sunny boy 1800 with some problems. There is no manual and SMA website does not have it available. I need to watch the lights on the inverter to find the problem, but I'm not there now and I can't get this off my mind, so I will ask the esteemed members of this list.
When it's cloudy, the inverter comes on and loads the array. I can watch the sunny keeper watts reading rise until it get around 1000w and full sun hits the array. Once full sun hits the array, the inverter drops out. It did it three times to me today, and the inverter will not come on during full sun. Grid volts and hz are okay durning this.
I know it's impossible to troubleshoot like this, but anyone deal with problems like this?
Thanks for the help!
Jesse Dahl
Sent from my iPad!!!
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