Re: [RE-wrenches] PVWatts Module Temperature Coefficient

2010-06-11 Thread Bill Brooks
-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Joel Davidson Sent: Monday, April 19, 2010 9:03 PM To: RE-wrenches Subject: Re: [RE-wrenches] PVWatts Module Temperature Coefficient Dave, Thank you. PVWatts does not predict accurately Unisolar (-0.21%/degC) or Sunpower

Re: [RE-wrenches] PVWatts Module Temperature Coefficient

2010-04-20 Thread Joel Davidson
Message - From: "Dave Click" To: "RE-wrenches" Sent: Monday, April 19, 2010 7:01 AM Subject: Re: [RE-wrenches] PVWatts Module Temperature Coefficient (was Enphase derate) It seems to be -0.5%/degC: http://rredc.nrel.gov/solar/calculators/PVWATTS/moreabout.html -

Re: [RE-wrenches] PVWatts Module Temperature Coefficient (was Enphase derate)

2010-04-19 Thread Dave Click
It seems to be -0.5%/degC: http://rredc.nrel.gov/solar/calculators/PVWATTS/moreabout.html Original Message Subject: [RE-wrenches] PVWatts Module Temperature Coefficient (was Enphase derate) From: Joel Davidson To: RE-wrenches Date: 2010/4/18 12:23 Wrenches, PVWatts does

[RE-wrenches] PVWatts Module Temperature Coefficient (was Enphase derate)

2010-04-19 Thread Joel Davidson
Wrenches, PVWatts does not accurately predicate Unisolar and Sunpower module performance because it uses a generic single crystal silicon solar module power temperature coefficient (I think -0.4% per degree C). Does someone have the technical paper that specifies PVWatts module temperature coeff