frontal. adj. 1. of, at, or in the front. 2. (Anatomy) of or relating to the forehead: frontal artery. 3. (Anatomy) of or relating to the anterior part of a body or organ.
As the cost of solar electricity has fallen, the number of grid-connected solar PV systems has grown into the millions and utility-scale solar power stations with hundreds of megawatts are being built. Solar PV is rapidly becoming an inexpensive, low-carbon technology to harness renewable energy from the Sun.
When comparing price per watt, capacity factor should be considered in the overall cost comparison. For instance; if the cost of solar is $1 per watt, when including an average capacity factor of approximately 20%, this cost rises to $5 per watt when compared to a hypothetical source that produces energy consistently.nstallation costs [edit]. Coal power plants are generally one of the least expensive sources of electricity by this measure, at a construction cost around $2.10 a watt.