The term solar panel is used colloquially for a photo-voltaic module. A PV module is an assembly of photo-voltaic cells mounted in a framework for installation. Photo-voltaic cells use sunlight as a source of energy and generate direct current electricity
A solar inverter or PV inverter, is a type of electrical converter which converts the variable direct current output of a photovoltaic solar panel into a utility frequency alternating current that can be fed into a commercial electrical grid or used by a local, off-grid electrical network.
A solar battery is simply a battery charged with energy from solar panels. There are lots of types – tiny to utility-scale. If you're looking for smaller solar power solutions, check out our pages on: Portable Solar Panels & Chargers. Solar-Powered Generators.