LA-based startup DartSolar said its electric vehicle roof rack attachment adds 10 to 20 miles of additional range per day.

A solar panel typically produces about 1.5 kilowatt-hours (kWh) per day, so if your daily kWh usage is 30, you would need 20 solar panels to generate all of your energy needs. Do solar panels ...

The cost of cheap solar panels can range from $2.40 to $3.74 per watt. Factors such as equipment quality and system size can affect the price of solar panels. Faith is a writer whose work has been ...

Monocrystalline solar panels cost between $1 and $1.50 per watt on average and are usually the most popular choice. As the name suggests, monocrystalline cells are made with one silicon crystal.