SMA Sunny Boy SB4000US Inverter (discontinued model)

This model has been discontinued, but is still new in the box. We can, therefore, offer this at a low cost. If you find that you can use it you may purchase it.



Compact design makes them ideal for residential use and the integrated DC disconnect makes installation more cost effective.
They are field-configurable for positive ground systems making them more versatile than ever. Increased efficiency means better performance and shorter payback periods. With over 500,000 fielded units, Sunny Boy has become the benchmark for PV inverter performance and reliability throughout the world.

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 & Attributes

  • Dimensions (LxWxH): 18 × 14 × 9 inches
  • Weight: 70 lbs
  • Improved CEC efficiency
  • Near perfect sinewave shape
  • Integrated load-break rated DC disconnect switch
  • Integrated fused series string combiner
  • Built-in LCD output display
  • Comprehensive SMA communications and data collection options
  • Maximum Power Point Tracking
  • Ideal for residential or light commercial applications
  • Rugged cast aluminum outdoor rated enclosure
  • passes requirements for CA renewable energy rebate program
  • Isolation monitoring
  • Surge voltage protection
  • Interruption protection.
  • LED indicator for malfunction
  • Ground fault protection
  • Rugged outdoor enclosure
  • MPN: Sunny Boy 4000US-10



Additional Information

Weight 70 lbs
Dimensions 20 × 16 × 12 in


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