Levelized cost of energy (LCOE) is a common benchmark in the energy market. The basic idea is to estimate the lifetime cost of producing a form of energy and divide that by projected lifetime output. The measure allows reasonable comparisons of fundamentally different energy technologies with different cost structures.  The same approach can be used to compare the variants within a single energy technology category. Levelized cost of hydrogen (LCOH) allows reasonable comparisons of the different hydrogen production technologies.