Re: [RE-wrenches] federal tax credit

Todd,    See IRC sections 25D and also 136 if there is a utility paid incentive, as any utility paid incentive may affect how 25D is applied. You may also want to see Sections 280A(d)(1), 280A(d)(2), and 280A(f)(1) for the definitions. Jamie JohnsonNABCEP Certified PV Technical Sales Professional

Re: [RE-wrenches] Feeder without a dedicated breaker

William, I would start with Article 240.21(B). Jamie JohnsonNABCEP Certified PV Technical Sales ProfessionalNABCEP Certified Solar PV InstallerGeneral Manager SOLAR POWER ELECTRIC     Original Message Subject: [RE-wrenches] Feeder without a dedicated breakerFrom: William Miller

Re: [RE-wrenches] Wet locations: (was Push-in Wire Connectors)

William, the only explanation that I have found for using THWN-2 in conduit run through the attic is that during the day as the temperature in the attic increases, the air in the conduit expands, at night the opposite effect happens, the temperature in the attic decreases and the volume of air in t

Re: [RE-wrenches] Re-shingling roof - Added "life cost"?

Benn,   In Florida generally speaking, the average life for a composite shingle roof is 20 years even though the manufacturer often provides a 25-40 year shingle warranty.   So far the only roof system that I have run into with a useful life equal to or greater than the useful life of a PV module i

Re: [RE-wrenches] Module Load Rating

y have caused some manufacturers to designate the 50 psf load for UL. Or, module manufacturers just do the 50psf IEC load which corresponds to a "designated" 33.3 psf load for UL times that 1.5 factor.On 2011/10/6 17:03, Jamie Johnson wrote:> Rich, It is my understanding that modules

Re: [RE-wrenches] Module Load Rating

Rich, It is my understanding that modules are tested to 113psf downforce or snow load and 52psf uplift for their NRTL listing (uplift is also a load rating denoted as negative pressure) (don't have a copy of the testing procedures in front of me however I have confirmed this with more than one modu

Re: [RE-wrenches] big combiner box

Amtec makes or did make a 36 circuit non-metallic enlosure   company name is either Amtec or AmtecSolar Jamie JohnsonNABCEP Certified PV Technical Sales ProfessionalNABCEP Certified Solar PV InstallerGeneral Manager SOLAR POWER ELECTRIC     Original Message Subject: [RE-wrenche

Re: [RE-wrenches] SMA High AC Voltage vs MPP

Drake,   The sunny boy design tool assumes a max grid voltage of 240 (I have version 1.56 that allows you to select 250vAC as the max on screen #2), if your grid voltage exceeds the grid design voltage then the minimum mpp design voltage needs to increase along with it in order to maximize your kWh

[RE-wrenches] Oatey and Standoff vs QuickmountPV Labor

Wrenches,   We have been asked to quote a large number of installs on comp shingle roofs for an individual owner who requires Oatey flashing's with a 3" standoff on all installations.    For the past 2 years we have installed the QuickmountPV product on comp shingle roofs and are use to the labor

Re: [RE-wrenches] Financial Analysis Tools

Have you tried SAM from NREL?  Or a custom spreadsheet?   NREL also has a new spreadsheet out for calculating IRR and ROI with PBI's, however it is a bit convoluted (ridiculous number of inputs) and uses a generic kWh calculation instead of a normal modeled output.   Are you trying to calculate a s

Re: [RE-wrenches] NABCEP Test

bject line when you pass, not sure what it says if you don't. Jamie Johnson NABCEP Certified Solar PV Installer NABCEP Certified PV Technical Sales Professional General Manager SOLAR POWER ELECTRIC (941) 380 - 0098 EC13001765 www.SPEFL.com Sent from my iPhone On Mar 31, 2011, at 11:42

Re: [RE-wrenches] Expansion joints

Peter,   Cooper makes one for 1.5" emt, not sure if it is rated for wet locations or not.   part #XJG54 EMT, it allows for up to 4" max of conduit movement.   Jamie Johnson NABCEP Certified PV Technical Sales Professional NABCEP Certified Solar PV Installer   General Manager SOLAR POWE

Re: [RE-wrenches] Value of PV system to a home

lly they will resolve the PV valuation issues for loan transactions soon.    Jamie Johnson NABCEP Certified PV Technical Sales Professional PVTS012911-44 NABCEP Certified Solar PV Installer 031310-118   General Manager SOLAR POWER ELECTRIC     Original Message Subject: [RE-wrenc

Re: [RE-wrenches] Cell temperature (back of module temp) effects on yearly kWh predicted generation

I don't know if this is what you are looking for or not, however Dr. Perez in Albany NY was working on developing a weather based performance guarantee for NY.  It may help with your research.   http://www.cleanpower.com/Content/Documents/research/capacityvaluation/WeatherAdjustedPerformanceGuarant

Re: [RE-wrenches] Xslent?

It's an interesting product for a niche market if it actually works as they say (Disclaimer:I am not claiming that it does), after speaking with an individual who I believe is the VP of Production for Apparent (use to work for EnPhase according to their website), he claims that the product is curre

Re: [RE-wrenches] Xslent?

Interesting website August,  not sure if it uses a battery backup or simply supplies/returns reactive power at night from normal inductive loads.  In their graph they list what items were running during the test and some of them are inductive loads, if they are capturing the reactive power and retu

Re: [RE-wrenches] Inverter Comparison Reactive vs Active Po wer...Was. Xslent?

August,   It appears in reading the installation manual that with a power factor of .64, that 6 KW system can theoretically produce a dynamically adjustable combination of active and reactive power up to 9.37 KVA however the KW will remain the same at 6 KW.  I sped read the manual so I may have mis

Re: [RE-wrenches] feed-in imbalance

Bill, thanks for the background information.  I always wondered about the reason behind the rule.   Jamie     Original Message Subject: Re: [RE-wrenches] feed-in imbalanceFrom: "Bill Brooks" Date: Fri, December 10, 2010 6:38 pmTo: "'RE-wrenches'"

Re: [RE-wrenches] feed-in imbalance

Marco,   I believe some of the discussions in the past had to do with the old 6kW imbalance limit that is used by several utilities on a 120/240 small residential single phase transformer. (don't remember the CA utility that came up with this) I had this discussion with our local utility (FPL) rece

Re: [RE-wrenches] What is a solar installer...?

ither are allowed in FL.    The plug and play connected to an existing branch circuit route appears to be more likely targeted to the unlicensed inexperienced handyman who can't pull a permit for solar electric.   Going back to the nest now!     Jamie Johnson NABCEP Certified Solar PV Installer #

Re: [RE-wrenches] insolation v. actual output

Marco, If you are looking for an equation for the measured ac output in watts to compare to STC, then solarpro mag had an article in OCT/NOV 2009 along with a temp and irradiance factor chart that may help. Jamie Johnson General Manager SOLAR POWER ELECTRIC TM NABCEP Certified Solar PV

Re: [RE-wrenches] Enphase v. string inverter

ntee standard would eliminate this practice. Other industries have similar standards to insure the customers receive what they paid for, why not PV? Jamie Johnson General Manager SOLAR POWER ELECTRIC TM NABCEP Certified Solar PV Installer #031310-118 (941) 380 - 0098 www.SPEFL.com FL State Certi

Re: [RE-wrenches] Enphase v. string inverter

back to the customer if estimates are not met can be a good thing and improve the industry IMHO. Jamie Johnson General Manager SOLAR POWER ELECTRIC TM NABCEP Certified Solar PV Installer #031310-118 (941) 380 - 0098 www.SPEFL.com Commercial & Residential FL State Certified # EC13001765 Sent

Re: [RE-wrenches] The Demise of WEEB

tical, but is tin-plated aluminum, has a plated screw, and is not listed for outdoor use."   Jamie Johnson NABCEP Certified Solar PV Installer #031310-118 General Manager SOLAR POWER ELECTRIC EC13001765   Original Message Subject: Re: [RE-wrenches] The Demise of WEEBFrom: &quo

Re: [RE-wrenches] Wiley Asset

mory card, nothing like getting an out of memory error while up on the roof! Jamie Johnson General Manager SOLAR POWER ELECTRIC TM NABCEP Certified Solar PV Installer 031310-118 (941) 380 - 0098 www.SPEFL.com FL State Certified # EC13001765 Sent from my iPhone On Sep 8, 2010, at 5:46 PM, benn kil

Re: [RE-wrenches] Picking a Quality Chinese PV Module

Nick, We have been installing Trina modules on projects in FL for the past year and I am pleased with their performance and quality. They also have one of the best balance sheets in the business. Jamie Johnson NABCEP Certified Solar PV Installer #031310-118 General Manager SOLAR POWER