SMA Sunny Boy 3.8-1SP-US-41 3840 Watt Transformerless Grid-tie String Inverter

SMA Sunny Boy 3.8-1SP-US 3840 Watt Inverter

SMA America has removed the WiFi feature of some products due to supply chain issues. A hard-wired network connection will still work, or using an optional cellular network connection. SMA is on an industry-wide back-order. They are unable to give us ETA currently. Until then, please take a look at the "no WiFi" version of this inverter.

For more information and updates, please see the notice posted on the SMA website:

Discontinuation of the WiFi function

The SMA "-41" Series Sunny Boy inverter, featuring SunSpec signal transmitter chip, is one of the most versatile residential inverters available. Combine this series with the SMA-TS4-R-F in order to build cost effective NEC 2017 PV RSS compliant string systems, or pair with SMA-TS4-R "-S" / "-O" (and comms gateway) to provide module level monitoring / optimization (respectively). Or leave all the rooftop electronics behind and design the system to take full advantage of the Secure Power Supply (SPS feature not Compatible with Sunspec based PV RSS). 600V max system DCV, compatible with both 240V and 208V sites, and backed by SMA's Power+ customer service package.

Sunny Boy 3.8-US Features & Specifications:

• Maximum PV Power: 6,144 Watts
• Maximum DC Voltage: 600 Volts
• AC Nominal Power: 3,330 Watts @ 208V | 3,840 Watts @ 240V
• AC Apparent Power: 3,330 Volt-Amps @ 208V | 3,840 Volt-Amps @ 240V
• Nominal Voltage (adjustable): 208 / 240 Volts AC
• AC Voltage Range: [183-229VAC for 208VAC systems] and [211-264VAC for 240VAC systems]
• AC Grid Frequency: 50 Hz or 60 Hz
• Power Factor: 1
• Output Phases: 1
• Maximum Efficiency: 97.3% @ 208V & 97.6% @ 240V
• Environmental Protection Rating: NEMA 3R
• DC Disconnect Device: Yes
• DC Reverse Polarity Protection: Yes
• Ground Fault Monitoring / Grid Monitoring: Yes
• AC Short Circuit Protection: Yes
• All-pole Sensitive Residual Current Monitoring Unit (RCMU): Yes
• Arc Fault Circuit Interrupter (AFCI): Yes
• Internal Power Consumption at Night: <5 Watts
• Topology: Transformerless
• Cooling: Convection
• Interfaces: Ethernet / WLAN
• Dimensions: 21.1" x 28.5" x 7.8"
• Weight: 57 pounds
• Warranty: 10 Years