MX60 Max Array Voltage? [RE-wrenches]

[Christopher Freitas - OutBack Power]

Darryl Thayer wrote:
> In the case of the MX60 and the open
> circuit voltage of collector arrays, is it possible to
> use the MX60 bypass, diversion load feature to shed
> power when the voltage gets to high?  

We have considered this - but there are some drawbacks to each solution 
and end the end you get added complexity and more parts to possible 
fail.  

Keeping it simple is a better idea usually.  

Also - adding the voltage limiter will not address the NEC issues of 
maximum system voltage - it still is based on the PV without anything 
connected to it...  

I did see a controller years ago that switched in a variable number of 
diodes in series with the PV array to taper the PV output current 
without any switching PWM etc.  Elegant in a certain way - but it made a 
lot of heat...   

Christopher Freitas
OutBack Power Systems, Inc.
cfreitas at outbackpower.com  www.outbackpower.com
Tel 360 435 6030  Arlington WA USA

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