Correction: a 2007 handset, not a modern launch If you see headlines about a “solar phone” tied to Hi‑Tech Wealth, they refer to a clamshell handset introduced in China in 2007, not a brand‑new mainstream smartphone. That device—commonly reported as the S116—was an early commercial experiment in integrating a photovoltaic panel into a mobile phone. … Read more
Thinking about installing solar photovoltaic (PV) yourself to lower your electric bill? DIY solar can reduce project labor costs and give you control over equipment selection, but whether it saves significant money depends on your location, utility rules, roof and electrical conditions, and the limits your local authority places on homeowner work. This guide outlines … Read more
October 5, 2007 — Frito-Lay dedicated a rooftop solar photovoltaic (PV) system on the roof of its Arizona Service Center in Phoenix. At the time, the array was commissioned as an early large-scale commercial solar project in Arizona and was described in contemporaneous reports as the largest business-owned PV system in the state. What was … Read more
Introduction: Pick the light for the job, not just the look Solar-powered outdoor lights are a convenient way to add ambience, mark paths, or highlight features without running electrical wiring. But performance varies widely. Start by deciding what you want the light to do and match the fixture type and specifications to that task. Decide … Read more
Project overview This project builds a small model house with a photovoltaic (PV) panel that converts light into low-voltage direct current (DC) to power a miniature load (an LED, buzzer, or small DC motor). You can use it as an engineering demonstration (showing how a PV-powered device works) or as a focused science investigation (testing … Read more
A rooftop project with two purposes In the early 2000s The Green Project in New Orleans installed a rooftop solar photovoltaic (PV) system as an explicit experiment in both onsite energy and public education. The installation was framed at the time as a small, grid-connected demonstration: a way to reduce purchased electricity for a nonprofit … Read more
Small-scale solar projects can be rewarding and practical when scoped correctly. This guide explains the difference between fabricating a DIY PV module and assembling a safe, small off-grid or portable solar system from commercial parts. It focuses on realistic use cases (sheds, RVs, workshops, lighting), how to size a system, which components you need, important … Read more
Quick summary The credit commonly called the “residential energy tax credit” is officially the Residential Clean Energy Credit under Internal Revenue Code §25D. For qualified clean-energy property placed in service through December 31, 2025, the credit generally equaled 30% of qualified costs. Under Public Law 119-21 (enacted July 4, 2025), new §25D expenditures made after … Read more
Introduction: Solar can help, but it isn’t one-size-fits-all Rooftop solar photovoltaic (PV) systems can produce electricity for your home, lower the amount you buy from the utility, and reduce operational emissions. Whether it’s worthwhile depends heavily on your roof, local sunlight, utility rules, and how you plan to pay for the system. This article explains … Read more
Solar pool heating uses solar thermal collectors—typically unglazed polymer or rubber panels—to heat pool water by routing filtered water through channels warmed by sunlight. These collectors transfer heat directly to the water; they are not photovoltaic (PV) modules that generate electricity. Proper planning covers collector sizing, siting, plumbing integration, controls, freeze protection, and permits rather … Read more