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

[David Katz]

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Hi Kelly,
They will cost about $130 each and you would need one for each string.
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

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Kelly Larson wrote:
> 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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