MARATHON MSR50245 C

This site computes the figure of 2,494 kWh. The registry does not publish it. The calculation combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.9 with the daily hot-water draw the DOE test assigns to the low draw pattern. The data comes from the DOE CCD, retrieved 2026-09-19. Against the class median of 2,439 kWh, this model sits 55 kWh higher. Its rank is 122nd lowest energy use of 163, which places it in the second-highest quarter of its class for energy use. The comparison covers only electric tank models registered at the low draw pattern. The steps behind the calculation are set out on the page about how the annual cost is calculated.

The figure applies only to the low draw pattern. A household whose hot-water use matches that pattern can compare this unit directly with the other models in its class. The unit has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 41 gallons. Its rated volume is 48 gallons. The data does not show energy use under other draw patterns, so that figure is not available here for a household with higher demand. Those readers can use the selector by fuel, space and size to compare other units. Because this model uses 55 kWh more than the class median of 2,439 kWh, it does not suit a reader whose priority is the lowest energy use in the class.

The running cost is not stated in the text because it depends on your own utility electricity tariff. The cost calculator on your own ZIP applies your rate to the 2,494 kWh shown above. The same rate also sets what the 55 kWh gap from the class median costs over a year. The installed price is not published. This model's ratings lie outside the range the cost database's model was fitted on, and that range is not stretched past its limit. If you are verifying a swap for an existing unit, you can find a same-class replacement by model number and compare its figure with the 2,494 kWh on this page.