[RE-wrenches] Inverter sizing

bob ellison reellison at gmail.com
Wed Sep 28 04:46:31 PDT 2011


 Am I safe to assume this is off grid? If so the charge controller does the
work.
If so do the calculations on panel sizing for the cold temps and try to
avoid depending on the charge controller to clip any over voltage, Sooner or
later failure is a possibility if you plan on the protection circuit and it
fails nothing good will happen. 
Best to be on the safe side.

Later,
Bob Ellison

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jesse Dahl
Sent: Tuesday, September 27, 2011 11:11 PM
To: RE-wrenches
Subject: [RE-wrenches] Inverter sizing

Hello,

I have been looking at some archived threads (lots of knowledge on here
eh?!) about inverter sizing.  The temperature swings in my area (100 degrees
F to -55 degrees F) are making me stay up hours finding inverters and
modules that don't clip during the cold snowy months when it is clear.  

The data collection info that has been posted has been helpful, but I would
like to know what designers are doing to size inverters for situations like
this.  Allow clipping? If so, how much is acceptable?  1kW, 2kW during those
cold clear days (3 months a year here).  Or is any clipping to much?  

Thanks everyone!

Jesse Dahl  

Sent from my iPad!!!
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