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

[Larry Crutcher, Starlight Solar]

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
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