DoesTheMath

Bosch US3-RSJ-15/300RDVN3-L3 vs LG APHWC802D: which uses less energy?

At the high draw pattern the LG APHWC802D uses 1,210 kWh a year and the Bosch US3-RSJ-15/300RDVN3-L3 1,240 — 30 kWh (2%) less, about 302 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 high draw pattern.

Filed and computed figures
Bosch US3-RSJ-15/300RDVN3-L3 LG APHWC802D
UEF (Uniform Energy Factor) 4 4.1 (better)
Energy use per year (kWh) 1,240 1,210 (better)
First hour rating (gal) 91 91
Rated storage volume (gal) 74 72
Installed cost range $3,993–$4,924 not published
ENERGY STAR certified yes yes
Sound level (dB) 49 not filed
Refrigerant R-134a, GWP 1430 R-134a, GWP 1430
On the market since 2024-05-30 2026-03-15
DOE CCD · 2026-09-19

What it costs to run

Bosch US3-RSJ-15/300RDVN3-L3: 1,240 kWh a year LG APHWC802D: 1,210 kWh a year

Bosch US3-RSJ-15/300RDVN3-L3 — 1,240 kWh a year LG APHWC802D — 1,210 kWh a year

LG APHWC802D is 30 kWh a year lower than Bosch US3-RSJ-15/300RDVN3-L3.

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.
  • Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
  • Time on the market, as filed with ENERGY STAR: the Bosch US3-RSJ-15/300RDVN3-L3 since 2024-05-30, the LG APHWC802D since 2026-03-15. A sale date, not a lifespan.

Which should you pick?

  • Pick the LG APHWC802D if running cost matters most: it uses 30 kWh less a year on the same test.
  • Pick the Bosch US3-RSJ-15/300RDVN3-L3 if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the LG APHWC802D.
  • Neither if your household's busiest hour needs more than 91 gallons of hot water — neither lists more. Check whether a 75-gallon heater is enough.

Each model on its own

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