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The PTC heater can be adapted to the requirements of any vehicle model and used as a de-central system, too; e.g. as head-space heating system in a convertible located in the headrest. Serial production of high-voltage heating systems (up to 500 V, up to 7 kW) for hybrid, electrical and fuel-cell vehicles is located in Germany ( Herxheim , Pfalz).
A domestic storage heater which uses cheap night time electricity to heat ceramic bricks which then release their heat during the day. A storage heater or heat bank (Australia) is an electrical heater which stores thermal energy during the evening, or at night when electricity is available at lower cost, and releases the heat during the day as required.