solar – adj. of or related to the sun

tile – n. flat piece of material for covering a roof

cell – n. small container used to hold materials for producing electricity

invisible – adj. impossible to see, not visible

install – v. put a piece of equipment in a particular place

conserve – v. use carefully to prevent loss or waste

sustainable – adj. able to be used without becoming completely used up or destroyed

generate – v. produce

sensible – adj. showing good sense or judgment

vision – n. clear idea about what should happen in the future