SMA Sunny Boy 3800W Inverter SB3.8-1SP-US-41


SKU: SB3.8-1SP-US-41 Category:

Volume discount pricing

Preferred pricing available. Contact us when ordering multiple inverters.

SMA US-41 Inverters
SMA America is producing the US-41 series of string inverters. The SMA Sunny Boy 3800W Inverter SB3.8-1SP-US-41 features an integrated DC disconnect, simplifying the installation and providing a safe system operation. It features multiple independent input channels, each with ShadeFix technology. The new technology allows you to install the solar panels in numerous possible string configurations, even on roofs with complex layouts and shading issues.

Sunny Portal Communication
Enhanced communication capabilities remove the need for additional equipment in system monitoring. The connection to SMA Sunny Portal facilitates a superior monitoring solution. It gives you lifetime access to SMA Smart Connected. SMA installation assistant and smartphone commissioning capabilities make getting systems up and running faster and easier than ever before.

All US-41 SMA inverters are SunSpec certified shutdown devices to achieve compliance with NEC 2017 module-level shutdown. They also provide advanced AFCI compliance to new Standard UL 1699B Ed.1 for arc fault protection. The AFCI feature delivers improved safety and reliability while allowing for automatic resetting. Do not be concerned about California Rule 21; it is easy to configure the inverter with the required values. 

SMA model: SB3.8-1SP-US-41
Rated power: 3800W
Features Secure Power Supply (SPS)
Transformerless with Arc-Fault Protection
Operating voltage: 208/240VAC
Integrated DC disconnect
Number of MPPT inputs: 2
Connectivity: Built in Ethernet/WLAN
Warranty: 10 years

For installation guide, user manual, and additional documentation visit SMA supporting documents download section.

The full family of US-41 inverters include the following 6 models:

SMA Model Max. Usable DC Power at 240V Number of MPPT Trackers
SB3.0-1SP-US-41 3100W 2
SB3.8-1SP-US-41 4000W 2
SB5.0-1SP-US-41 5150W 3
SB6.0-1SP-US-41 6200W 3
SB7.0-1SP-US-41 7200W 3
SB7.7-1SP-US-41 7950W 3

Secure Power Supply
The Secure Power Supply (SPS) feature comes standard with the SMA Sunny Boy US-41 series inverters. It is SMA’s battery-less solution for daytime power outages. The SPS can provide up to 2000W to a dedicated outlet wired directly to the Sunny Boy inverter.

To benefit from the SPS feature, you need a switch, grounded outlet, box, and conduit to wire (not included with inverter). The SPS output in the US-41 inverters is 2000W; the equipment and wires installed have to be sized to handle the 16 Amps of current the SPS can supply.

Install the SPS during the original solar installation or later on as a retrofit. Please note that the Secure Power Supply feature is not compatible with SMA TS4 module optimizer units.

Complete grid-tie systems
We offer complete residential solar systems using the Sunny Boy US-41 inverters. For more information please visit

Complete solar systems delivered to your home


SMA America

SMA America is a pioneer in photovoltaics power conversion, they started in 1981 in Germany. Today they are a top 3 inverter manufacturer worldwide with presence in 15 different countries including the United States and Canada. In 2011 they opened the solar academy in California to help installers understand SMA’s technology and bring that knowledge to the home of thousand of homeowners in the US. SMA staples are the Sunny Island inverters for off-grid and remote applications and the Sunny Boy inverters for residential and small commercial applications. In recent years they added the Tripower line of commercial inverters ranging from 12kW to 30kW per unit. Some of their inverters are assembled in Colorado and qualify for the ARRA recovery act. All their units are UL listed and comply with the most recent requirements in the National Electric Code (NEC). Additionally SMA provides their Sunny Portal free of charge to SMA users. It is one of the most advanced energy communication platforms; all SMA inverters can transfer production data to the Sunny Portal. The portal is accessible to system owners via the Internet, where they can view and monitor their system’s performance in great detail. SMA America has raised the bar in the solar industry for over 30 years and they certainly will continue to do so.

SMA Sunny Boy Inverter Datasheet


Technical specifications for SMA Sunny Boy US-41 inverters

SMA Inverter Warranty


Limited warranty information for SMA inverters

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