Array Voc > 140V for MX-60 [RE-wrenches]

[Kelly Larson]

Hi David,

Thank you for replying.

How much do you charge for this box?  I would need two, one for each 
string, correct?

Happy day,
Kelly

Kelly Larson
BSEE
Ca Electrical Contractor #868189

~~~~~~~~~
David Katz wrote:
> 
> Kelly,
> If you were able to get under the ridge cap, we have the perfect product 
> 
> for you. Our first production run on our low temperature module bypass 
> will be ready in a few days. This is a small box that mounts behind one 
> module in a string and essentially takes that module out of the string 
> when the temperature drops below 20F, lowering the string voltage by the 
> 
> open circuit voltage of one module. The box has 4 MC connectors on it so 
> 
> it can easily be wired across the last module in the string. This device 
> 
> is being manufactured for us by Apollo Solar. We originally designed it 
> for grid tie systems where string sizing is tight, but it could easily 
> be used to protect MX-60 and T-80 charge controls from over-voltage.
> David
> 
> David Katz
> AEE Solar, Inc.
> formerly Alternative Energy Engineering
> 1155 Redway Drive - Box 339
> Redway, CA  95560  USA
> Phone 707-825-1200
> Fax 707-825-1202
> email david at aeesolar.com
> www.aeesolar.com
> 
> 
> Kelly Larson wrote:
> > Fellow Wrenches,
> >
> > Has anyone figured out a kluge for the “Voc too high in the morning” 
> > problem on the input from the array to the MX-60?  I have run into two 
> > systems (not designed by me) where the MX-60 doesn’t connect until later 
> > 
> > in the morning on cold days due to this.
> >
> > On one, the array is mounted on a 2 story home under the ridge cap, 
> > which at this point is not accessible, (because of weather), so I can’t 
> > just go around the last module in the strings.  I figure some 
> > diode/relay/electronic thingy…
> >
> > So I am looking to drop about 10 - 15V, (from 150Voc to 140V, or better, 
> > 
> > 135V), with 20A max current
> >
> > Thank you in advance for any ideas,
> > Kelly
> >
> > Kelly Larson
> > BSEE, Ca C-10 #868189, Energy Educator


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