tested and certified by the Underwriters Laboratory. The inverter and controller must meet specifications provided by the Institute of Electrical and Electronic Engineers (IEEE), which is the same international body that governs standards for most electrical equipment. The overall system and its installation are governed by the National Electrical Code and local engineering standards which define the safety requirements for all other electric circuits and devices in your home or office.

The EPA (U. S. Environmental Protection Agency) has plans to help by using solar and wind energy. All forms of electrical generation create some level of environmental impact. However, clean energy technologies, including renewable energy and combined heat and power, have fewer impacts than other sources of electrical generation (http://enviroliteracy.org/). The EPA and USDA are now sponsoring workshops to inform consumers that renewable energy is necessary. They display solar and wind turbine models to assist in explaining how the systems work and their benefits.