Sanyo HIT panels in off grid app [RE-wrenches]

[Ron Young]

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Hi Larry,
I have two jobs under consideration, one with 6 - 195's using a 6024  
Blue Sky and an 80' run, and one with 8 - 195's using an MX60 and a  
150' run. We can get -40 (F) temps in extreme winters but more  
recently -30 is the more common extreme with average temps around 0  
to -15 (F), so I definitely am conscious of the potential for probs  
with any Voc over about 125 total :-)

Ron

On Nov 1, 2007, at 6:31 PM, Larry Crutcher, Starlight Solar wrote:

>
>
> solareagle wrote:
>>
>>
>> Hello Wrenches,
>> Has anyone had any experience installing Sanyo HIT panels in off grid
>> applications? Because of their high voltage and VOC I think they can
>> only be strung together in singles in our cold winter environment
>> using an MX or Blue Sky controller. That makes it a little awkward
>> for getting the best (smallest) wire size for arrays located some
>> distance from the power house. Any comments?
>>
>> Ron Young
>
> Hi Ron,
>
> I install many Sanyo HIP 200BA3 panels in battery based systems. I  
> just
> put 3 on a motorhome today and I always run them parallel. The Voc of
> the 200 is 68.7. Two in series is 137.4 at 77F. There is no place  
> in the
> USA that the temperature does not drop below 77 at some time during  
> the
> year. In other words: don't even think about doing it.
>
> The Blue Sky 6024 has a zener diode set at 140 volts. It will disable
> the PV input if you ever exceed maximum input voltage and the zener  
> will
> have to be replaced.  No warranty for the repair. (although Rick is  
> very
> forgiving most of the time!) The MX60 will permanently log the over
> voltage. Not sure what will happen but if you have a warranty issue  
> and
> they see the over voltage...
>
> The HIP 200BA3 has 3.59 Imp. You did not mention how many modules you
> are using but 4 200's with an 80' run will only have 1.65% loss (about
> 13 watts) using 6 gauge. Thats much better than the old days of 48  
> or 24
> volt runs and huge wire.
>
>
> Larry Crutcher
> Starlight Solar
> Yuma, AZ
> Renewable Energy Products Powered by STARLIGHT
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Best Regards,
Ron Young


"I'd put my money on solar energy...I hope we don't have to wait till  
oil and coal run out before we tackle that." ~ Thomas Edison, in  
conversation with Henry Ford and Harvey Firestone, March 1931

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