American Electric Technologies - macht jetzt auch Wechselrichter - 500 Beiträge pro Seite

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MICHAEL KANELLOS: JULY 15, 2011
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American Electric Technologies got its first solar inverter certified for sale in the U.S. last week.

Not bad for a company founded in 1946.

The publicly traded company has provided converters, inverters and power equipment to run the DC-based equipment employed by the oil and gas industry for decades. Now, with the growth in solar, it has fashioned a utility-scale inverter for multi-megawatt projects. The first product -- the one that just got certified -- is a 1,000-volt, 1-megawatt inverter for solar fields. (Technically, it can go to 1200 volts, but everyone wants a margin.) While 1000-volt inverters can be obtained in Germany, U.S. utility fields largely rely on 600-volt inverters. (See photo.)

"We are used to 1.5-megawatt distributed generation projects: foot throttles, mud pumps," said CEO Charles Dauber during an impromptu meeting on the floor at Intersolar, which is taking place in San Francisco this week. "Our equipment is in the Middle East, the jungles of South America."

Overall, AmEl has installed over 1 gigawatt worth of equipment in its history.

A 1,000-volt inverter is in many ways a fundamentally different beast, Dauber argued. One just can't scale up smaller inverters. Engineers have to reconsider the selection and arrangement of components and other issues. AmEl, for instance, designs the workstations for technicians in a such a way as to allow them to wear the least amount of protective clothing. Large customers also often want a certain degree of customization.

Although a 1,000-volt inverter costs more than a 600-volt one, it pays dividends immediately. The larger inverters reduce ongoing maintenance, drive down component costs and even increase power production by 10 percent to 15 percent.

"For every dollar you spend, we will give you more watts," he said.

AmEl has yet to land any solar deals, but it just got certified, too. The equipment potentially could go into hundreds of projects.

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http://www.aeti.com/

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