DoesTheMath

HUBBELL ME65HPT vs Stiebel Eltron Accelera 300 E: which uses less energy?

At the medium draw pattern the HUBBELL ME65HPT uses 973 kWh a year and the Stiebel Eltron Accelera 300 E 1,025 — 52 kWh (5%) less, about 522 kWh over ten years. Both are filed as an electric tank, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

Compared within one class only: models filed as an electric tank at the medium draw pattern.

Filed and computed figures
HUBBELL ME65HPT Stiebel Eltron Accelera 300 E
UEF (Uniform Energy Factor) 3.34 (better) 3.17
Energy use per year (kWh) 973 (better) 1,025
First hour rating (gal) 70 66
Rated storage volume (gal) 57 58
Installed cost range $3,366–$4,103 $3,379–$3,943
ENERGY STAR certified yes not matched
Sound level (dB) 54 not filed
Refrigerant R-134a, GWP 1430 not filed
On the market since 2023-09-01 not filed
DOE CCD · 2026-09-19

What it costs to run

HUBBELL ME65HPT: 973 kWh a year Stiebel Eltron Accelera 300 E: 1,025 kWh a year

HUBBELL ME65HPT — 973 kWh a year Stiebel Eltron Accelera 300 E — 1,025 kWh a year

HUBBELL ME65HPT is 52 kWh a year lower than Stiebel Eltron Accelera 300 E.

DOE CCD · 2026-09-19

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Enter your ZIP to price both units on the same rate where you live.

Reliability

Not published: Reliability, failure rates and each model’s actual warranty term.

The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.

What is here instead:

  • The filed efficiency, capacity and tank size of both models, side by side below.
  • The actual warranty term is printed in each model’s documentation, not in any registry.

Which should you pick?

  • Pick the HUBBELL ME65HPT if running cost matters most: it uses 52 kWh less a year on the same test.
  • Pick the Stiebel Eltron Accelera 300 E if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the HUBBELL ME65HPT.
  • Neither if your household's busiest hour needs more than 70 gallons of hot water — neither lists more.

Each model on its own

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