Walden Pond, the solar version: Part 1

By Jeffrey Yago, P.E., CEM Issue #99 • May/June, 2006 I have been writing solar power articles for many years on every possible application. This has included everything from simple solar chargers for cell phones to...

7 Solar Water Heating System Designs

By Michael Hackleman Issue #65 • September/October, 2000 (Rob Harlan is a general and solar contractor with 25 years of experience with solar water heating systems in Mendocino County, California. Rob primarily designs and installs photovoltaic...

Job site solar power

By Jeffrey Yago, P.E., CEM Issue #144 • November/December, 2013 Regardless of your favorite brand, standardize all battery-powered tools to use the same battery pack. If you are planning to live off-grid or are building something in a...

Dim bulbs in California

By Jeffrey Yago, P.E., CEM Issue #107 • September/October, 2007 By now many of us have heard that under a bill proposed by Assemblyman Lloyd Levine (D), the state of California is about to become the...

Homemade electric power

By Jim Van Sant Issue #131 • September/October, 2011 Ever wonder how you could live off the grid when the sun isn't shining on your solar panels? Our homestead alternative energy system is based on 12 volts...

Portable solar power

By Jeffrey Yago, P.E., CEM Issue #134 • March/April, 2012 Fold-up solar modules now available in many sizes As the cost of solar cells has declined, the industry has started to increase the physical size of individual...

Make your own biodiesel for 80¢ per gallon

By Jeffrey Yago, P.E., CEM Issue #101 • September/October, 2006 My Ford F-250 diesel crew-cab pickup did not cause me to become interested in making my own bio-diesel fuel. No, the final straw was when I...

Design calculations for no-head, low-head waterwheels

By Rudy Behrens Issue #17 • September/October, 1992 (This is the second of our three-part series on waterwheels. The third installation (Issue No. 18) will deal with overshot wheels. -- Editor.) For those of you who are...

How to select the right backup generator

By Jeffrey Yago, P.E., CEM Issue #82 • July/August, 2003 Now that the threat of terrorist sabotage to our utility infrastructure has been added to our basic concerns about storm related power outages, this may be...

Solar Building Design

By Steven Heckeroth Issue #63 • May/June, 2000 Solar building design has been used since ancient times. In the more recent past, it has been more or less ignored as impractical, complicated, or too expensive. Incorporating...

Keep those gadgets working after the power goes out

By Jeffrey Yago, P.E., CEM Issue #84 • November/December, 2004 The recent 2003 northeast electric grid failure taught the residents of many large cities what most rural residents learned years ago: Lights, air conditioners, televisions, stereos,...

An $89 backup generator

By Jeff Yago, P.E., CEM Issue #159 • May/June, 2016 While I strive in all of my articles to only recommend products of high quality and reliability, I realize many of us are on a fixed-income...

Build a simple solar-powered outdoor light

By Jeffrey Yago, P.E., CEM Issue #92 • March/April, 2005 Figure 1. Pole-mounted street light showing a front view of the solar light In our last issue, I discussed how to use solar energy to power a...

Battery powered weekend retreat

By Jeffrey Yago, P.E., CEM Issue #83 • September/October, 2003 Blake McKinney owned several acres of beautiful deep forest wilderness along a fast-moving year-round fishing stream that was perfect for a planned weekend retreat. Mr. McKinney,...

Hydronic woodstoves

By Jeffrey Yago, P.E., CEM Issue #105 • May/June, 2007 Do you realize there is an entire field of woodstoves that the general public rarely hears about, even though there are specialty woodstove stores in every...

Solar Power 101: Inverters

By Jeffrey Yago, P.E., CEM Issue #89 • September/October, 2004 This article is the third in a series of our beginner's course in solar electricity. Simultaneously we have instituted a Home Energy Information (www.homeenergy.info) section on...