Phantom solar — The crucial invisible system needed before you install solar

By Jeffrey Yago, P.E., CEM Issue #78 • Are you planning to install a solar photovoltaic system to reduce your utility bills? How would you like it if your first solar electric power system had invisible...

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...

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...

Don’t discount a generator, especially a diesel generator, as your primary power source

By Skip Thomsen Issue #28 • July/August, 1994 There are three major reasons that wind, solar or hydro-electric systems are impractical for some folks: not enough wind, too many cloudy days, and no stream. In that...

Solar-powered chicken coop

By Jeffrey Yago, P.E., CEM Issue #132 • November/December, 2011 Pre-manufactured chicken coop with roof-mounted solar module I am sure many of you have raised large flocks of chickens for years as a normal part of rural...

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...

Why you need to addsolar to your emergencypower backup plans

By Jeffrey Yago, P.E., CEM Issue #149 • September/October, 2014 Click Here to listen to an interview with Jeff about this article. Most of the electric substations, transmission lines, and electrical switchgear for any given utility are...

Are hydrogen-fueled cars pie-in-the-sky?

By Jeffrey Yago, P.E., CEM Issue #103 • January/February, 2007 Hydrogen-fueled cars is a topic of much discussion these days. People who want to see the U.S. freed from dependence on foreign oil often assume the...

Solar suitcase

By Jeffrey Yago, P.E., CEM Issue #150 • November/December, 2014 Completed solar suitcase project From time to time, people call to ask what we have for emergency solar power suitable for a bug-out bag. Naturally, my first...

For a truly independent energy system, your choices are solar, wind, and water

By Larry Elliott Issue #28 • July/August, 1994 Just as the words "backwoods home" conjure up images of farmhouses, livestock, woodstoves, tractors, and gardens, the words "independent energy" bring to mind a whole new set of...

Build your own battery charging station

By Jeffrey Yago, P.E., CEM Issue #142 • July/August, 2013 Completed charging station after sanding and painting Let me guess — the reason many of you do not use rechargeable batteries is that every time you need...

Solar Power 101 — Batteries: Part 2

By Jeffrey Yago, P.E., CEM Issue #88 • July/August, 2004 This article is the second in a series of what will be a beginner's course in solar electricty. Simultaneously we have instituted a Home Energy Information...

Grid-tie solar-powered farm

By Jeffrey Yago, P.E., CEM Issue #94 • July/August, 2005 Photo 1: One of two Fronius 3-kW grid-tie inverters. Note the DC-rated safety disconnect and all high voltage wiring installed in metal conduit. Most of my past...

Add solar power to your truck camper

By Jeffrey Yago, P.E., CEM Issue #93 • May/June, 2005 The recreational vehicle (RV) world is having a major comeback with the influx of baby-boomers. Today's travel trailers, 5th wheels, and motor coaches now include everything...

Standby battery charging techniques can ensure engine startups

By Jeffrey Yago, P.E., CEM Issue #83 • September/October, 2003 Those of us living beyond the suburbs own various sizes and types of yard and garden machinery. From the mandatory riding lawnmower for those weekend warriors...