Stiebel Eltron Accelera 300 E

The 1,025 kWh figure is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium pattern. For this model the UEF is 3.17. The total holds only at the federal test's daily draw. A home drawing more or less hot water will use a different amount. Among the 426 models registered as an electric tank at the medium draw pattern, this one ranks 111th lowest for energy use. That puts it in the second-lowest quarter of its class. The source is DOE CCD data retrieved on 2026-09-19. The method is set out in how the annual energy and cost are calculated.

The Accelera 300 E has a rated volume of 58 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 66 gallons. The 1,025 kWh total applies to homes whose daily hot-water use is close to the medium draw pattern. For those homes, the 2,506 kWh gap below the 3,531 kWh class median is the comparison this page supports. It does not apply to homes whose daily use differs from that pattern. Figures for other draw patterns are not available on this page. A plumber or seller matching this unit can find a same-class replacement by model number. That keeps the comparison within the same heater type and draw pattern.

Running cost is not stated in this text because it depends on your own utility electricity tariff. The page computes it from your ZIP, using 1,025 kWh a year at the medium draw pattern as the energy input. The 2,506 kWh difference from the class median carries into cost at whatever rate you pay. What that difference is worth on your bill is unknown until your tariff is applied. To see it, use the running cost calculator for your ZIP. The installed price range sits in its own block with its source and date. It is a modeled installed-cost range, not a quote, and this text does not restate it.