Thin-film solar companies are tired of being asked about their conversion efficiency, which is basically the amount of sunlight a panel can convert into electricity. Part of that is because the thin-film manufacturers say the efficiency standard is flawed. And increasingly some thin-film companies are pushing for a new standard.
At a Credit Suisse party last month, John Argo, vice president of operations for Bloo Solar, said he would like to see the formation of an independent body to come up with an objective standard more reflective of the sunlight a panel would get on an average day.
“No standards measure for that,” he said. “It should be possible to come up with an equation to do this.” He argues that what really matters is the total kilowatt-hours a panel produces, not the cost per watt. (This is in contrast to the viewpoints of people like Suntech Power CEO Zhengrong Shi, who has said that cost per watt is the only metric that matters.)
What’s the problem with the current efficiency measurement? Commercially available thin films aren’t as efficient as conventional silicon-based solar cells, at least the way efficiency is measured today. The standard of measurement is based on peak power, or the maximum amount of electricity that a panel can produce in ideal conditions.
Read More about Are Thin-Film Solar Efficiency Standards Unfair?