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State ENL-50 1**

State ENL-50 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 4 listed models

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under A. O. Smith ENL-50 1**.

Storage volume
48gallons
UEF
0.92Uniform energy factor
First-hour rating
51gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

State ENL-50 1**: advertised and certified
State ENL-50 1**: advertised and certified Size: advertised 51 gal, certified 48 gal (advertised nominal size, certified storage volume). Size: advertised 48 gal, certified 48 gal (certified storage volume). UEF: advertised 0.92, certified 0.92. First-hour rating: advertised 51 gal, certified 51 gal. Size · advertised nominal size, certified storage volume Advertised 51 gal Certified 48 gal Size · certified storage volume Advertised 48 gal Certified 48 gal UEF Advertised 0.92 Certified 0.92 First-hour rating Advertised 51 gal Certified 51 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 51 gal, nominal size 48 gal storage volume State Read Oct 4, 2026
Size 48 gal 48 gal storage volume State Read Oct 4, 2026
UEF 0.92 0.92 State Read Oct 4, 2026
First-hour rating 51 gal 51 gal State Read Oct 4, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EN6-50-DOLS 1**480.925198%Medium
EN6-50-SOLS 1**480.925198%Medium
ESX-50-DOLS 1**480.925198%Medium
PCE-50-2OLSA 1**480.925198%Medium

UEF is the uniform energy factor. A dash means the model has no such figure.

It holds 48 gallons in the test, 3 gallons less than its 51-gallon sold size. Over one hour from a full tank, it gave 51 gallons in the test (its first-hour rating). That is 3 gallons more than its tank holds, since it reheats during the hour. Of 477 electric storage models, 286 give more hot water in the first hour. The median electric storage model gives 55 gallons in its first hour.

In tests, 92% of the energy went to hot water, so its UEF is 0.92. The daily hot water use in the test, called its draw pattern, was medium. Among 297 electric storage models on its draw pattern, 81 have a higher UEF. For its type and draw pattern, its UEF sits at the median. The water took in 98% of the energy used to reheat it (its recovery efficiency).

It is sold under 4 model numbers in all. There are 5 more basic models with the same test figures. Each of the 5 other brands lists one of them. For the full group, see the A. O. Smith ENL-50 1**.

Also listed as

They carry every figure in the table above.

Updated Oct 19, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.