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Stiebel Eltron Accelera 300 E Heat Pump Water Heater

2 Reviews
SKU 233059
Original price $2,599.00 - Original price $2,599.00
Original price
$2,599.00 - $2,599.00
Current price $2,599.00
in stock

The Stiebel Eltron Accelera 300 E Heat Pump Water Heater represents the pinnacle of water heating technology, engineered in Germany and leading the European market for over 30 years. Unlike traditional models, this heat pump water heater is designed to operate primarily on its heat pump mechanism rather than relying on a backup element, ensuring maximum efficiency. It offers an impressive reduction in hot water costs by up to 80%, providing both comfort and the lowest possible energy expenditure. Moreover, the Accelera 300 E is backed by a robust 10-year warranty, emphasizing its reliability and long-term performance.

  • Capacity: 79.8 gal
  • Refrigerant: R134a
  • Operating temperature range: 42°F to 108°F (6°C to 42°C)
  • Water connection: 1˝ male NPT
  • Condensate connection: 3/4˝ male NPT to ½˝ barbed elbow
  • Safety condenser: Wraps around outside
  • Voltage / Frequency: 220–240 V / 60 Hz
  • Circuit breaker: 15 A

* Installation location has to have a minimum size of 10´ x 10´ x 8´.

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    General DataAccelera® 220 EAccelera® 300 E 
    Item No. 233058233059
    Operating temperature range42°F to 108°F (6°C to 42°C)
    DHW temperature149 °F (65°C)
    Air flow rate324 CFM
    Sound power level* 60 dB
    Sound pressure level* @ 3.3 feet (1 m)52 dB(a)
    Capacity58 gal (220 l)79.8 gal (302 l) 
    Refrigerant / fi lling weightR134a / 850 gR134a / 900 g
    Height60 7/8˝ (1545 mm)75¼˝ (1913 mm)
    Diameter27 1/8˝ (690 mm)
    Height of unit when tilted incl. packing74 1/8˝ (1895 mm)87¾˝ (2230 mm)
    Weight dry264.5 lb (120 kg) 297.6 lb (135 kg)
    Weight wet748.5 lb (339.5 kg)956.6 lb (433.9 kg)
    Water connection1˝ male NPT
    Condensate connection3/4˝ male NPT to ½˝ barbed elbow
    Safety condenserWraps around outside 
    Operating pressure, water side87 psi (600 kPa)
    High pressure cutoff, refrigerant side348.1 psi (2.4 MPa)
    Electrical Data & Performance
    Voltage / Frequency220–240 V / 60 Hz
    Circuit breaker15 A 
    Rated current compressor & fan2.7 A
    Rated power consumption compressor and fan (2)650 W
    Rated power, booster heater1500 W
    Heating output, heat pump3approx. 1700 W
    Energy factor3.053.39
    DOE est. yearly energy usage / cost1040 kWh1289 kWh
    DOE est. yearly energy cost$169$155
    First hour rating50.3 gal (190.4 l)74.2 gal (280.8 l)


     * Sound Power Level measures the sound energy emitted by a source. Sound Pressure Level (SPL) measures the sound level (loudness) at a distance from the source. SPL varies depending on the acoustic environment and the accuracy of the measurement device. 

    1 Tamb = 107.6 °F (42 °C) Twater = 149 °F (65 °C) / 240 V 

    2 Test point to DIN 8497 at 59 °F (15 °C) air temperature, 70% rel. humidity and 113 °F (45 °C) water temperature. 

    3 Test point at 59 °F (15 °C) air temperature, 70% rel. humidity, heating up water from 59 °F (15 °C) to 149 °F (65 °C), according to EN 255 T3, 240 V / 60 Hz

    Heat Pump Comparison and Mode

    "Hybrid" Water Heaters Accelera Heat Pump Water Heaters

    Their most efficient mode provides the greatest savings

     they're capable of. Water heaters operates only with the heat pump.


    "Hybrids" must be set to the correct mode in order to either save energy or provide comfort. 

    Heat Pump Mode

    This is the main setting. Accelera is engineered to satisfy 90% of hot

    water needs through the use of the heat pump alone. In cases of high

    demand, one specially-designed electric "booster" element is located at the very top 

    of the tank. Positioned near the hot water draw point, the element has been designed

    and engineered to run as little as possible so that comfort is maintained and savings maximized. 

    Two standard electric elements activate for fast water temperature recovery. System allows heat 

    pump to work once demand has been met via electric elements. 

    Hybrid Mode

    Accelera is designed to satisfy hot water needs without having to pick a setting. There is nothing 

    to remember to choose i order to have both comfort and savings. 

    Twi standard electric elements activate sooner and stay on longer than in their "hybrid" mode. High Demand Mode

    Accelera is engineered to work as a harmonious whole to offer comfort and savings without having to ask, 

    "what setting do I need to choose today?" In cases of extraordinarily high demand the Accelera 220 E has a 

    user accessible booster function that will engage the booster element.

    Heat pump is disabled and, just like a standard electric tank, two electric elements heat the

    water. "Hybrids" don't have active defrost and must enable this mode so the evaporator can

    defrost. This mode is also selected if the heat pump fails. 

    Standard Mode

    Accelera was engineered so that the heat pump doesn't need to be disabled for a defrost cycle. We also engineered 

    for reliability. Why pay extra for a heat pump water heater if you're just going to end up with

    a standard electric tank?

    Water heater maintains a very low temperature in the tank then reheats the water the 

    day before you return. 

    Vacation Mode

    Our super-insulated tank keeps water hot in an Accelera during a 2-week vacation for less than $4. No one has t worry if

    vacation mode was set to wake up on the correct day. 


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