The surface of the earth receives a tremendous amount of energy from the sun. It is estimated that the amount of solar energy that strikes the earth's surface daily is greater than the amount of energy used worldwide in 25 years.
Photovoltaic (PV) modules convert sunlight directly into electrical energy. Integrating PV into a building will impact its operation. Not only will the PV system produce electric energy to serve building loads but it can also reduce the building's electric demand and air-conditioning heat load.
The installation of photovoltaic (PV) equipment is governed by a number of industry codes and standards. Electrical contractors need to be aware of the codes and standards to ensure a safe and functional PV installation.
A group of students at St. Mary's Seminary and University in Baltimore were assigned to estimate the investment needed for solar photovoltaic (PV) technology to supply 20 percent of U.S. electricity by 2100.
The most focused on and visible part of a photovoltaic (PV) installation is the technology used. PV technology usually takes the form of rigid PV panels mounted on a building's roof, which represents another independent building system that needs to be installed.
There are a number of photovoltaic (PV) technologies available for converting sunlight into electrical energy. For building applications, technologies that are commercially available are predominately silicon-based and can be categorized as either crystalline silicon or thin film.
Photovoltaics (PV) are semiconductors that convert sunlight directly to direct-current (DC) electric power. Photovoltaic technology has been used for years in specific applications where conventional utility service is not readily available or practical.
Distributed generation (DG) refers to the practice of locating small-scale electric generating units at or near the load served. With distributed generation, individual buildings or complexes can have a local electric power supply that provides some or all of the facility's electric energy needs.
Photovoltaic (PV) modules convert sunlight into electrical energy that can be used to provide power for specific loads within a building in a standalone system or as a supplement to the building’s utility power supply in an integrated system.
Outdoor solar lighting has a bright future With little fanfare, solar lighting systems are being installed on a growing number of projects, and lighting powered by sunlight has quietly evolved into a mature technology with widespread acceptance.
It’s been said that opportunities in solar power photovoltaics—abound for electrical contractors. True or false? You be the judge. Thirty-five states provide some type of solar incentive, ranging from sales tax and property tax waivers to investment credits.
By Rick Laezman Schoolchildren in New York State are learning about the benefits of solar power in their own school buildings. The New York State Energy Research and Development Authority (NYSERD) has launched a program to install new solar systems in 50 schools statewide.
California’s energy crisis, with its well-publicized rolling blackouts, effectively depleted the state’s 15 percent energy reserve. In efforts to restore it, Gov. Gray Davis is calling for a heavier reliance on green power—including solar—through the California Power Authority.
A new design for thin-film solar cells that requires significantly less silicon and may boost the efficiency is the result of an industry/academia collaboration between Oerlikon Solar in Switzerland and the Institute of Physics’ photovoltaic group at the Academy of Sciences of the Czech Republic.
I recently did a workshop for a major city experiencing problems with inspections on photovoltaic (PV) systems during and after installation. The problem was between the inspection and fire department.