BRUNNTAHL (dpa-AFX) - Fuel cell supplier SFC Energy has received a follow-up order from Canada. A Canadian oil producer has ordered fully integrated frequency converters (VFD) for 5.3 million Canadian dollars (3.7 million euros), the SDax company announced in Brunnthal near Munich on Tuesday. The order will be booked as sales this year, it said. The customer from the province of Alberta had already ordered corresponding frequency converters worth more than 10 million dollars in October. The VFD systems operate electric pumps for oil production. SFC Energy specializes in power supply using fuel cells for stationary and mobile energy supply. The company had been included in the small-cap index SDax in December./men/mis