[RE-wrenches] Insolation calc anyone ;)

[bruce]

Compadres,

I have 4 identical arrays of 3 strings of 3 Solarworld SW 245 mono (2010 model) to FM80s. When designing, not exceeding 150 voc was critical. No record temp data available. Location ~ 4,000' Pacific Northwest. Recently replaced an FM80 with 6 blown FETs showing max power at 3075 watts! This from a 2205 watt array into a 24 volt battery. Max historical voc is ~120. My guess at record low temp is -10F. tc%/ºC MPP doesn't get anywhere close. What would the WM2 need to be in order to achieve 3075 watts on a 2205 watt array? BTW, 2 of the four original chargers are still working fine and one of them also shows 3075 watts max power. Edge of cloud effect against snow field at bottom of array?

Cheers,

Bruce Fiero-RMI

"Energizing the Rogue Valley"

4115 S Pacific Hwy

Medford, OR 97501

P: 541.535.3965
F: 541.512.0061
E: br...@willpowerelect.com
W: Willpower Electric, LLC 

CCB 191852
Oregon Electrical Contractor C681
NABCEP Certified Solar (PV) Installer 031409-38

DUNS 191470363 

Energy Trust of Oregon Trade Ally Solar (PV) Installation & Energy Efficient Commercial Lighting Programs  

 

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