Web Xtras

Contractor Bid Comparison Worksheet HP153: Andy Kerr's PV Contractor Bid Comparison Worksheet
2012-2013 PV Module Buyer's Guide HP152: Detailed specs on UL and CEC listed PV modules
2011-2012 PV Module Buyer's Guide HP146: Detailed specs on UL and CEC listed PV modules
   
Grid Parity Calculator HP145: Customizable spreadsheet from "Grid Parity"
   
Thoughts on VAWTs HP143: Companion article to "VAWTs & HAWTs"
   
Vertical-Axis Wind Generators HP143: Companion article to "VAWTs & HAWTs"
   
Energy Sources & Distribution Flow Chart HP142: Corrected Schematic for article "Renewable Health Care in Hati
   
2010-2011 PV Module Buyer's Guide HP140: Detailed specs on UL and CEC listed PV modules for residential-scale projects.
   
Rebekah Younger & Guy Marsdens' 
Solar Tech:
HP140: Companion articles to "Getting Charged with Chevy's Volt"
Solar Heat: for My Maine Workshop
Microinverters Make a Simple DIY Installation
Solar Heat Upgrade: Expanding & Improving an Owner-Installed System
 
   
Generator Sizing & Loading HP140: Companion article to "Preparing for Winter: Is Your Off-Grid PV System Ready?
   
Inverter Basics HP140: Companion article to "Grid-Tied Inverter Applications".
   
Testing & Verifying Module Voltage & Current HP139: More details on making sure your modules are performing within their parameters.
   
Wind-Electric Systems Simplified HP137: An in-depth look at what wind system will meet your home's need.
   
Wind Power Curves HP137: What's Wrong, What's Better: Learn how to compare wind turbines and assess their performance
   
Troubleshooting Small Wind Systems HP137: What to do when your wind system goes awry.
   
PV Array Mounting Options HP137: Read this for additional PV mounting information "Rack & Stack: PV Array Mounting Options" by Ryan Mayfield (HP124)
   
Pitched Roof Mounting HP137: Read this for additional PV mounting information "Pitched Roof Mounting" by Rebekah Hren (HP130)
   
Schools/Organizations Offering PV Training HP136: This document is the expanded table version from "Charting Your Solar Course"
   
Off or On Grid? Getting Real HP136: Read this for a detailed analysis of the advanages and disadvantages of on- and off-grid renewable energy systems.
   
Code Corner 134 correction HP134: This document contains corrected text and equations.
   
The Fundamentals of Heat Exchangers HP134: For the ins and outs of solar hot water system heat exchangers, read this: "The Fundamentals of Heat Exchangers" by Chuck Marken (HP128).
   
PV Module Buyer's Guide Spec Details HP134: Here are the specifications explanations as promised in the "Buyer's Guide" article in HP134.
   
Finding True South correction HP131: This document contains the corrected illustrations for the article on page 22.
   
Chiras-Richter Discount Table HP131: Here's the live spreadsheet promised in PV system economics article in HP131. Use this to Excel file to begin your own PV system financial analysis.
   
Catching the Cloudburst HP125: Size your home rainwater harvesting system with these simple formulas.
   
Hydro-Electric Penstock Design HP 125: Here are the tables promised in the microhydro penstock article in HP125 . Use these tables to determine the pipe size needed to handle the amount of flow and length of the pipeline.
   
Marken Solar Hot Water Systems Guide HP 125: Complete data table of SRCC certified solar water heating systems. Current as of January 14, 2008.
   
Rakfeldt System Article Issue 120: An original article from HP 6, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Palumbo System Article Issue 120: An original article from HP 17, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
McCoy/Reising System Article #1 Issue 120: An original article from HP 24, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
McCoy/Reising System Article #2 Issue 120: An original article from HP 89, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Robishaw System Article Issue 120: An original article from HP 35, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Otto System Article Issue 120: An original article from HP 47, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Kinzel/Kingsley System Article Issue 120: An original article from HP 47, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Buck System Article #1 Issue 120: An original article from HP 48, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Robishaw System Article #2 Issue 120: An original article from HP 109, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Haeme System Article Issue 120: An original article from HP 81, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Laughlin System Article Issue 120: An original article from HP 92, revisited in issue 120’s ‘Twenty Years of People Power’ article.
   
Solar Domestic Hot Water System Sizing Spreadsheet

Issue 118: Size a solar domestic hot water system for your home or business using this interactive spreadsheet.

   
Andy Kerr's PV system 
spreadsheet
Issue 117: Andy Kerr's financial spreadsheet analyzes the profitability of the second phase of his PV installation and can be used to analyze the economics of your own system.
   
Andy Kerr's hybrid vehicles spreadsheet

Issue 113: Andy Kerr's hybrid vehicle economics spreadsheet.

   
Climate Change Still Fixable

Issue 113: Can We Still Avoid Dangerous Human-Made Climate Change? NASA director James Hansen's presentation on climate change, to the New School University.

   
Nukes & Climate Change

Issue 112: Heinrich Böll Foundation report on nuclear energy and climate change.

   
PV Wire Costs Issue 104: Kent Osterberg's wire vs. PV costs spreadsheet.
   
DTIPVTrialsReport.pdf Issue 104: Performance data for Anthony Skelton's PV system in the UK. Refer to system F in report.
   
Load Calculation Articles
Load Calc. Spreadsheet
Issue 102 and 58: Electrical load calculation spreadsheet.
   
MPPT Plans Issue 102: Tim Nolan's plans for his maximum power point tracking (MPPT) PV controller project. Updates are available atwww.timnolan.com.
   
Andy Kerr's PV system 
spreadsheet
Issue 101: Andy Kerr's financial spreadsheet analyzes the profitability of the first phase of his PV installation and can be used to analyze the economics of your own system.
   
Joe Miller's Windows program Issue 98: Joe Miller's Windows program for using digital multimeters and a PC to measure and log both battery voltage and current for his electric vehicle project.
   
Biodiesel Blends in Space Heating Equipment Issue 97: A government-sponsored report on the use of biodiesel and heating oil blends for home heating.
   
SolarDecathlonScoring.xls Issue 96: Solar Decathlon scoring details.
   
Energy Policy Act of 2003, House Passed Version Issue 95: Energy Policy Act of 2003. Note: the Committee version was promised, but since then it was passed in this form by the full House.
   
New Apollo Dear Colleague Issue 94: Representative Jay Inslee's letter to colleagues in support of the New Apollo Project.
 
Apples & Oranges ’02 Technical Appendix Issue 90: Wind turbine Apples & Oranges - technical appendix.
 
PV Wire Sizing Issue 86 and 93: Spreadsheet for PV array wire sizing (copper only).
 
CF Bulb Spreadsheet Issue 86: Compact fluorescent lighting financial payback spreadsheet.
 
Midnight Special Issue 84: Battery-based inverter system design for electricity backup during utility outages.
 
Brandt EV evaluation spread Issue 77: Spreadsheet for evaluating electric vehicles.
 
Article (pdf)
Board layout (gif file)
Board layout (ps file)
Issue 75: Pulse-width-modulator (PWM) circuit.
 
NolanDecimate.zip Issue 74: Tim Nolan's data-logging Decimate programs.
 
damdereg.pdf Issue 73: Public Citizen's report on dams and their relationship to utility deregulation.
 
mark8.pdf Issue 43: Build Your Own 12 VDC Engine generator. Includes Mark 8 field controller (version 8.3) circuit schematic.

 

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