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SMA Sunny Boy Grid Tie Inverter 4000 Watt SB4000US

$1,907.00
Sunny Boy 4000 US Grid-Tie Inverter - 4000 Watts

The Sunny Boy 3000US and 4000US are the first of the new “US” series of Sunny Boy string inverters. They have been updated with our most advanced technology and are designed specifically to meet the new IEEE 1547 requirements.

Their compact design makes them ideal for light commercial or 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 overall performance and shorter payback periods. Each are engineered and built to last and now come with a standard ten year warranty. Sunny Boy inverters are trusted worldwide to go the distance.

ModelSunny Boy 4000US
Recommended Max. PV Power
(Module STC)		4375 W @ 208 V / 5000 W @ 240 V
Max. DC Voltage600 V
Peak Power Tracking Voltage220 V – 480 V @ 208 V
250 V – 480 V @ 240 V
DC Max. Input Current18 A
Number of Fused String Inputs2 (inverter), 4 x 15 A
(DC disconnect)
PV Start Voltage (adjustable)285 V
AC Nominal Power3500 W @ 208 V / 4000 W @ 240 V
AC Maximum Output Power3500 W @ 208 V / 4000 W @ 240 V
AC Maximum Output Current17 A
AC Nominal Voltage / Range183 – 229 V @ 208 V
211 – 264 V @ 240 V
211 – 264 V @ 240 V, AC Frequency / Range60 Hz / 59.3 Hz – 60.5 Hz
Power Factor0.99 @ nominal power
Peak Inverter Efficiency96.8 %
CEC Weighted Efficiency95.5 % @ 208 V, 96.0 % @ 240 V
Dimensions W x H x D in inches17.8 x 13.8 x 9.3
Weight / Shipping Weight88 lbs / 94 lbs
Ambient Temperature Range–13 to +113 °F
Power Consumption: standby / nighttime< 7 W / 0.1 W
TopologyPWM, true sine wave, current source
Cooling ConceptLow frequency transformer, true sinewave
Mounting LocationIndoor / Outdoor (NEMA 3R)Included/Included
LCD Displayincluded
Lid Color: aluminum/red/blue/yellowincluded/optional/optional/optional
Communication: RS485 / Wirelessoptional/optional
Warranty: 10-yearincluded
Compliance: IEEE-929, IEEE-1547, UL 1741, UL 1998, FCC Part 15 A & Bincluded


  • CEC efficiency of up to 96 %
  • 10 Year warranty standard, up to 20 years optional
  • Certified to the new UL 1741/ IEEE 1547
  • Integrated load-break rated DC disconnect switch
  • Integrated fused series string combiner
  • Sealed electronics enclosure and OptiCool
  • Comprehensive SMA communications and data collection options
  • Ideal for residential or light commercial applications
  • Rugged cast aluminum outdoor rated enclosure
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This product was added to our catalog on Thursday 25 June, 2009.