First there was the SB 3800U. Now, the latest addition to the Sunny Boy Family, the new SB 3300U PV inverter. Over two decades of engineering experience has culminated with the creation of the SB 3300U. Its new cast aluminum enclosure means lighter weight and better heat transfer for sensitive components. New construction and design techniques allow SMA to set the bar even higher when it comes to real-world efficiency and overall reliability. The new SB 3300U, evidence that the pioneering spirit is alive and well at SMA. Sunny Boy. Ask for it by name! Like its big brother, the SB 3800U, SMA’s new 3300 watt inverter processes solar energy at an unparalleled 95.6% efficiency and is the second in a new generation of inverters to be released in America. These new SMA inverters incorporate a cast aluminum housing used to separate the control and power electronics. This new chassis design is incredibly rugged, lightweight and weatherproof. The power electronics compartment integrates SMA’s new OpticoolTM airflow technology where cool air is drawn in through the bottom of the enclosure by convection, drawn around the power electronics where the air absorbs heat and is then released through a side vent. When required, this process is assisted by a temperature controlled fan. The built in meter displays system status as well as the solar energy being produced by the power plant and other key information on the LCD screen. Several meter and software options are available from your SMA supplier. Features: Exceptional efficiency Outstanding reliability and energy capture ratio LCD display included 5-year comprehensive warranty - extended warranty available Rugged cast aluminum outdoor rated enclosure Easy to install integrated wall mount bracket system Compatible with the SMA family of communications and data collection options Very quiet operation UL Listed to 1741