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Conversion to Energy that can be used in the Home

The specifications, structures, power generation efficiency of fuel cells described on this page are based on the specifications of our household fuel cell system developed as the first commercial model and different from those of the latest products.


Water heated by the heat emitted from the stack and stored in the hot water tank is energy that can be used in the home as it is, whether in the kitchen, in the bathroom or as room heating. However, the electricity generated by the stack is a direct current and cannot be used as it is in the home.

Conversion of Electric Energy by an Inverter

The electricity produced by fuel cells is direct current (DC), so it cannot be used in the home as it is. For this reason, an inverter (1) is installed in the fuel cell to carry out the conversion of the generated direct current to alternating current (AC) for use in the home.

In the inverter, the direct current generated in the stack is converted as follows: square wave → step-up → modulation/rectification → corrugation and is finally synchronized with the alternating current used in the household, before being supplied to the home.

Related Information

(1) Inverter
In precise terms, a device that converts an alternating current (AC) to a direct current (DC) is called a "rectifier," and a device that converts direct current into alternating current is called an "inverter." However, a device in which both functions are combined is generally referred to as an "inverter."

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Our fuel cells are intended for household use in Japan only.
Note that the data and values on this website are based on the energy conditions in Japan.


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