If you are using the word costs as a noun, then it is plural. You would say the costs are..., never the costs is.... If you are using it as a verb, then it refers to a singular object: It costs a lot of money They cost a lot of money.
The average solar water heating system can cost between $6,300 and $7,200 depending on the tank size and need.We help to make getting a solar water heating system installed in your home both easy and affordable.We provide two rebates to help you offset costs:he Cost of a Solar Water Heating System. The average solar water heating system can cost between $6,300 and $7,200 depending on the tank size and need. We help to make getting a solar water heating system installed in your home both easy and affordable. We provide two rebates to help you offset costs:
The heat is absorbed by water in nearby pipes, which carry the heat to a waiting container. These systems cannot fully substitute for an existing water heater--they cannot make the water hot enough--but they can certainly help. In 2010 a home solar water heater costs at least $1,000. Swimming pool versions cost several thousand dollars more. A full solar heating system designed to transform the sun's rays into heat for a home's air (and usually water as well) is much more expensive than a supplemental water heater.