SMA Unveils Windy Boy Grid-Tied Inverter

much anticipation SMA America, known for their popular line of solar photovoltaic (PV) inverters named the “Sunny Boy” have followed up with their first single-phase grid tied inverter for direct use with wind turbines. And following in their previous footsteps, the new inverter is aptly named the “Windy Boy.” UL has approved and added the Wind Turbine (WT) Source Type to the existing UL1741 listing for the Sunny Boy SWR1800U and SWR2500U models. The Sunny Boy 1800/2500 is now UL listed for the following DC input sources.

Grass Valley, California – November 10, 2003 [SolarAccess.com] After much anticipation SMA America, known for their popular line of solar photovoltaic (PV) inverters named the “Sunny Boy” have followed up with their first single-phase grid tied inverter for direct use with wind turbines. And following in their previous footsteps, the new inverter is aptly named the “Windy Boy.” UL has approved and added the Wind Turbine (WT) Source Type to the existing UL1741 listing for the Sunny Boy SWR1800U and SWR2500U models. The Sunny Boy 1800/2500 is now UL listed for the following DC input sources. The Windy Boy can be connected to any wind turbine with a three-phase rectified DC output within the operating ranges of the inverter. Multiple Windy Boy inverters can be paralleled for some turbines larger than 2500 watts. Each turbine manufacturer pre-configures the inverter for optimum operation with their specific wind turbine. Historically, grid-tied wind systems have been connected to the grid through charge controllers, batteries and inverter/chargers. SMA said that the resulting total efficiency of the power conversion from the turbine to the grid is typically around 50 percent. With the Windy Boy, the peak efficiency is the same as the Sunny Boy PV models; up to 93.5 percent for the SB1800 and 94.5 percent for the SB2500, according to the company. SMA said that one of the major benefits is that system cost is greatly reduced, as the charge controller, batteries, and associated switchgear can be eliminated. They said increased total energy capture combined with a reduction of balance-of-system components greatly reduces installation and operating costs of a grid-tied wind system. SMA listed off a host of advantages to their new inverter: The Windy Boy grid-tied system is virtually maintenance free. There are no inverter settings for the system owner to change and adjust or battery set points to hassle with. There are no complicated, expensive batteries to maintain, clean, monitor and replace. The Windy Boy will also carry the same 5-year warranty as all Sunny Boy inverters. The Windy Boy also uses the same advanced communication options as all other SMA products. You can install Windy Boy and Sunny Boy inverters in one installation and have them all communicate with Sunny Boy Control products or directly to a PC using the Sunny Data Control software program.

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