Sunny Boy SB3.8-US Inverter

Original price was: $1,523.00.Current price is: $1,084.00.

SMA Sunny Boy SB3.8-US Inverter / Transformerless / 3800w/ 208-240 VAC / 2 MPPT inputs / Secure Power Supply / Arc-Fault Protection / Built in Ethernet/WLAN

Out of stock

Sunny Boy SB3.8-US Inverter

Cost effective with powerful features

The Sunny Boy SB 3.8-US inverter, one of SMA’s new series of transformerless inverters represents the next step in performance for UL-certified inverters. The inverters are both economical and installer friendly. The transformerless design means the inverters are high efficiency with reduced weight and also less heat gain for the inverter. In addition, maximum power point tracking (MPPT) is derived from wide input voltage and operating temperature ranges, allowing for many stringing configurations and multiple independent MPPTs.

Shading issues have also been address in this new US series of inverters. SMA’s OptiTrac Global Peak shade mitigation technology provides a solution for both shade mitigation and the problem of installation on more complex roofs.

The newer version of the Secure Power Supply (SPS) feature now enables these Sunny Boy inverters to supply 2,000 watts of power in the event of a grid outage, as long as the sun is shining.

The SMA Sunny Boy US series now includes enhanced communications with no need to install additional equipment. Integrated WiFi or Wired datalogger and output to Sunny Portal for monitoring are now included, as well as direct access via a smartphone and use of SMA’s Installation Assistant.

Each inverter is covered by a 10-year warranty, which can be extended to 15 or 20 years.

Sunny Boy US Series Additional Features:

  • Sunny Boy’s new two-part enclosure allows the connection unit to separate from the power unit and aids in simple fast servicing, if necessary
  • Integrated DC disconnect simplifies onsite logistics and eliminates the need for a separate disconnect unit, saving time and money
  • Operating temperatures of -13 °F to +140°F
  • Multiple independent MPPTs
  • Enhanced AFCI technology reduces false tripping
  • Available in sizes from 3 kW to 7.7 kW
  • 10-year warranty, extendable up to 20 years
  • Listed to UL 1741, UL 1998, UL 1699B, IEEE1547, FCC Part 15 (Class A & B), CAN/CSA V22.2 107.1-1

Download the Sunny Boy  Quick Design Reference Tool that provides string design and inverter selection recommendations in a simple easy-to-use format.

SMA SB-US Series Inverters
Model Nom. AC power AC output Max DC voltage MPPT voltage range CEC rated efficiency MPPT trackers
SB3.0-US 3000 W 208 or 240 VAC 600 VDC 155-480 V 96/96.5% 2
SB3.8-US 3800 W 208 or 240 VAC 600 VDC 195-480 V 96.5% 2
SB5.0-US 5000 W 208 or 240 VAC 600 VDC 220-480 V 96.5-97% 3
SB6.0-US 6000 W 208 or 240 VAC 600 VDC 220-480 V 96.5-97% 3
SB7.0-US 7000 W 208 or 240 VAC 600 VDC 245-480V 96.5-97% 3
SB7.7US 7700 W 208 or 240 VAC 600 VDC 270-480V 96.5% 3

pdficon_largeSMA Sunny-boy SB3.0 to 7.7 US Series Inverter Specs

Additional information

Weight66 lbs
Dimensions31.5 × 23.6 × 11.8 in

10 years, extendable to 15 or 20 years


UL 1741, UL 1998, UL 1699B, IEEE1547, FCC Part 15 (Class A & B), CAN/CSA V22.2 107.1-1