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Jenny Heinzen is a licensed Master Electrician in Wisconsin and has taught courses in electricity, farm wiring, electrical code, wind, and solar power with the Wisconsin Technical College System. She has her bachelor's degree from UW-Stout in Career and Technical Education, and is a graduate student at UW-Green Bay in Environmental Science and Policy. Jenny volunteers for many committees and boards, including RENEW Wisconsin, DWEA, and NABCEP.

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Bill Hoffer has been working in the solar industry in the Pacific Northwest for more than 16 years. He is a Solar Energy International alum since 1994, a NABCEP Certified Solar PV Installer, and a Professional Mechanical Engineer in Washington State. His first job in the solar industry with Applied Power Corporation was designing remote off-grid mountaintop cell sites, when 10kW were considered "big" systems. In 1995 he designed the 360kW (160 kW...

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Rebekah Hren is a licensed electrical contractor, NABCEP Certified Solar PV Installer and ISPQ Certified PV Instructor for Solar Energy International. She has a wide range of solar experience, from living off-grid for many years, to installing PV and solar hot water systems, to designing utility-scale PV arrays with North Carolina–based developer O2energies. Hren writes technical articles for PV trade magazines and has co-authored two renewable...

Stephen Hren is a restoration carpenter, builder and teacher who specializes in sustainable design and passive and active solar heating technologies. He was inspired to write about those who “seek forgiveness rather than asking permission” after his off-grid cob home came to the attention of the local tax assessor, triggering a lengthy and painstaking after-the-fact inspection process. Along the way Stephen has helped to start a local food co-op and...

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