An electrical grid, also known as a power grid or electric grid, is a network of interconnected transmission lines, substations, and power stations that deliver electricity from suppliers to consumers.

The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation.

Photovoltaics, also known as solar cells, is a technology that converts sunlight directly into electricity.

A photovoltaic (PV) system, also known as solar power system, is a renewable energy system that uses solar cells to convert sunlight into electricity.

Renewable energy refers to energy sources that are replenished naturally and can be used without depletion.

Research and development (R&D) refers to activities conducted by companies, organizations, or governments to improve existing products, create new products, or enhance current processes and technologies.

Solar energy refers to the energy derived from the sun's radiation and converted into usable forms through various technologies.

Solar panels (also known as photovoltaic panels or PV panels) are devices that convert sunlight into electricity.