A fuel cell is an electrochemical energy conversion device. Fuel cells differ from batteries in that they are designed for continuous replenishment of the reactants consumed.
This is a partial list of companies currently producing commercially available fuel cell systems for use in residential, commercial, or industrial settings. Fuel cell systems from these manufacturers are currently being used to generate AC or DC electricity, heat, water, or any combination of the three.
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| Company | Products |
|---|---|
| AFC Energy | Hydrogen fuel cells Alpha System and Betha System [1] |
| Air Liquide | Hydrogen fuel cells and hydrogen filling centers [2] [3] |
| Ballard | Proton-exchange membrane (PEM) fuel cells [4] |
| Bloom Energy | Bloom Energy Server "Bloom Box" [5] |
| Ceres Power | Solid-oxide fuel cells (SOFCs) and reversible solid oxide cells (rSOCs) [6] [7] [8] |
| Cummins | Hydrogen fuel cells, vehicles [9] |
| Doosan Fuel Cell America | PureCell Model 400 and SOFC [6] [10] |
| FuelCell Energy | Molten carbonate fuel cells [11] |
| GenCell | Alkaline fuel cells GenCell REX [12] |
| Horizon | ECOBOC-MR, Aerostack, Hydromax [13] |
| Hyundai Motor | Hydrogen fuel cell electric vehicles (FCEVs) [14] |
| Intelligent Energy | PEM fuel cells, FCM-800 and IE-SOAR series [15] |
| Kyocera | SOFCs and systems [16] |
| Mitsubishi Heavy Industries | SOFCs and hybrid SOFC and micro gas turbine Megamie [17] [18] |
| Panasonic | Integration of hydrogen fuel cells and photovoltaic (PV) systems - Panasonic HX [19] |
| Plug Power Inc. | GenDrive, GenSure, ProGen [20] |
| Robert Bosch GmbH | PEMFC and SOFC [7] [21] |
| SFC Energy | Direct methanol fuel cells and hydrogen fuel cells [22] |
| Toshiba | Ene-Farm, [23] H2Rex [24] |