LOCHINVAR ENL-50 1**

The registry does not print the 3,531 kWh figure. This site calculated it from two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used. The second is the DOE test's daily hot-water draw for the medium draw pattern. For this model the UEF is 0.92, taken from the DOE CCD and retrieved 2026-09-19. The result holds only at that test draw. A household that uses more hot water each day than the medium pattern assumes will use more electricity than 3,531 kWh. A household that uses less will use less. The page cannot show how much hot water a specific home actually uses. The steps behind the figure are set out in how the annual cost is calculated.

The tank has a rated volume of 48 gallons. It also has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 51 gallons. Those two figures show supply at peak demand; the annual energy figure does not. DOE uses the medium draw pattern to represent a typical mid-sized household on a busy morning. Whether 51 gallons covers a particular home's busiest hour depends on that home's own use. The registry does not record that use, so this page cannot say whether the model suits a given home. If the peak demand calls for a different size, the same-class replacement finder lists models in the same class by model number.

The text does not state a running cost because it depends on your own utility electricity tariff. The cost calculator for your ZIP code applies your rate to 3,531 kWh. The comparison group is the 426 models registered as electric tanks at the medium draw pattern. This model's energy use equals the class median, as shown above. So at any electricity rate, its running cost matches that of a median model in the class. That comparison holds only at the test draw. The installed price range appears in its own block, with its source and date. That range is a modeled installed-cost estimate, not a quote.