Yes and no. Cost per watt is what you want when purchasing a panel to install, and you have sufficient space for what you are purchasing. A buyer's guide like

Yes and no. Cost per watt is what you want when purchasing a panel to install, and you have sufficient space for what you are purchasing. A buyer's guide like that should also consider longevity and reliability. The link is not a buyers guide. This is simply a table of efficiencies achieved by various technologies. There are plenty of non-buyer's guide uses for this table. Off the top of my head, this could be helpful in deciding which types of cells to invested in to see if a company could reduce cost and become best on a cost-per-watt basis.