Model # Accelera 300

Internet #203899071

Stiebel Eltron Accelera 300 80 Gal. Tall Hybrid Heat Pump Water Heater

Discontinued Stiebel Eltron

Accelera 300 80 Gal. Tall Hybrid Heat Pump Water Heater

  • First hour rating is 78.6 gal.
  • Superior insulation guarantees ultra-low standby losses
  • Same-day installation in most areas. Call 1-855-400-2552 by noon.
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Product Overview

Stiebel Eltron developed tankless electric water heating technology 90 years ago and continues as the industry pioneer and world leader. Our engineering excellence and high-quality manufacturing results in products fulfilling the highest expectations of performance and reliability. Thirty years of heat pump experience have taught us how to design a heat pump water heater to be as efficient as possible. The Accelera 300 extracts 80% of the heat it needs to make hot water from the energy in ambient air. We rely on the heat pump to make hot water, not on the back-up element. Heat pump draws only 500-Watt and every watt it uses generates 3 - 5-Watt of hot water. Over a year our 80 Gal. tank is more efficient than competing 50 Gal. tanks. In warm climates, the unit can be placed in a garage, where it uses the heat from the outside air; or inside the house, where it helps with air conditioning. In cooler climates, it is typically placed in a basement where it also dehumidifies the basement. Heat pump water heaters are not a new concept in Europe, and the Accelera 300, engineered and made by us in Germany, has been the largest seller there for 30 years. The Accelera 300’s ENERGY STAR energy factor is 2.51, the highest in the category.

  • Accelera 300 qualifies for federal, state, local, and utility financial incentives that may be available for heat pump water heaters
  • Single, specially-designed 1700-Watt back-up element can be disabled
  • 80 Gal. (300 l) tank is designed so 50 Gal. of hot water can be drawn before the back-up element is needed
  • Only wrap-around aluminum condenser on the market means no possible contamination of potable water
  • Glass-lined tank resists lime for longer life and the anode rod is replaceable
  • Can be powered by photovoltaic array
  • Higher the ambient air temperature where the unit is located, the greater the efficiency will be
  • Heat pump requires sufficient air in order to work and should not be installed in a closed space smaller than 10 ft. x 10 ft. x 8 ft.
  • Water heater height is approximately 75 in. tall and 1 ft. minimum additional is needed for servicing
  • Heat pump will dehumidify the space where it is installed and cool it down approximately 2-6°F (1-3°C)
  • Moisture removed from the air by the heat pump will require a condensate drain
  • Make sure the floor will support 1000 lbs., the weight of a unit filled with water
  • Do not install in a location where air temperature regularly drops below 42°F (6°C) or above 108°F (42°C)
  • All heat pump water heaters make noise roughly equivalent to a freezer while in operation and should not be installed where this would be a problem
  • Click here to check out our buying guide on water heaters
  • Inlet and outlet fittings are 1 in. NPT; condensate drain and T and P fittings are 3/4 in. NPT
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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$2,399.00 /each
$2,498.00 /each
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Name Accelera 300 80 Gal. Tall Hybrid Heat Pump Water Heater 58 Gal. Heat Pump Water Heater 80 Gal. Heat Pump Water Heater
Brand Stiebel Eltron Stiebel Eltron Stiebel Eltron
Ratings (19) (3) (3)
Wattage (watts) 1700 1500 1500
Water Heater Features Overheat Protection,Temperature Pressure Relief Valve Overheat Protection,Self Cleaning,Temperature Pressure Relief Valve Overheat Protection,Self Cleaning,Temperature Pressure Relief Valve
Water Heater Profile Tall Tall Tall
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Warranty / Certifications

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Customer Questions & Answers

Average percentage savings over conventional 220 V 80 gal tank?

I need to know a return on investment to see how long it would take (on average) to justify the additional cost.
Asked by: Anonymous
My friend said she saved about $40 a month once she was using the heat pump water heater. When it was off for service, then the electric bill went up $40.
Answered by: GoldenHVAC
Date published: 2016-01-29

Does warranty require professional installation?

Some product manufacturers require professional installation for their warranty to be valid. Is that the case with this unit?
Asked by: RJ
If the install is simple and you are an accomplished DIYer I would say yes. But we had some more compicated plumbing to do and changing of electrical, so I opted for professionals.
Answered by: papalion
Date published: 2016-01-15

What size house is this appropriate for ?

2-4 people, 3-5 people, 4-6 people 2-4 bathrooms, 3-5 bathrooms, etc ??
Asked by: chachi
This has a 80 gallon 'First hour' rating, meaning that with the tank full at 120F you can draw out 80 gallons of water that will be over 105F. This should be good for 2-4 bathrooms, and 6-8 people. Of course if they are all college students taking a shower at 6 am, you might run into a problem. If they take showers more than 30 minutes apart, then no problem recovering between showers. Recovery should be about 24 gallons per hour in the heat pump only mode. GE is building a higher capacity 'Norther Climate' HPWH that is rated to run in heat pump mode while in a 37F room (below 37 it changes to electric only mode) and is rated at 4 showers before reaching 105F. This is defined as 2 GPM draw for 8 minutes, then 5 minutes no draw, then 2 GPM X * minutes, 5 minute break until the water temp going out is less than 105F. The GE 80 gallon HPWH was able to draw out 4 times before reaching 105F. If you need a LOT of hot water, then the Nyle CCHP Cold Climate Heat Pump is rated at many more gallons per minute, and designed to be mounted outside, with 0F ambient, it can produce many gallons of hot water each hour. It uses a 24,000 Btu compressor. This water heater uses a compressor rated at roughly 6,000 Btu's per hour. It also is about as noisy as a microwave.
Answered by: GoldenHVAC
Date published: 2015-12-28

Can a whole house hot water recirculating pump be connected to this heater?

Asked by: Mike
Don't know, but there is no need to do it.
Answered by: papalion
Date published: 2016-09-23
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