Out of stock


Solar Loan from 6.99%
All SMA America LLC products


Dimensions LxWxH21.1" x 28.5" x 7.8" in
Weight57 lbs
ManufacturerSMA America LLC
Manufacturer Part #SBS-3.8-US-10
Operating Temperatures -40 °F to +140 °F
Warranty10 Years Manufacturer
Delivery Time 5-7 business days

About product

SMA Sunny Boy Storage battery inverter with 3800w AC nominal output over 240V. Compatible with LG Chem RESU 10H-C and BYD Battery-Box.

The Sunny Boy Storage battery inverter has been precisely engineered to serve as the intelligent interface between the electrical grid and the LG Chem RESU 10H-C or BYD Battery-Box. Its AC coupled architecture enables installation at any point in time, providing greater flexibility and giving installers the opportunity to generate new business with existing customers. The SBS system can be added to a home with any existing PV system. For high power backup applications, install the Sunny Boy Storage with the optional 200A Automatic Backup Unit. For low power backup applications, use the built-in in Secure Power Supply feature for up to 2000W of power in the event of a grid outage both day and night.


  • Rated efficiency of 97.5%. 
  • Operating temperatures of -13°F to 140°F. 
  • Up to three 10 A DC battery inputs.
  • Available in 3.8, 5.0, and 6.0 kW. 
  • Shipping Weight: 66 lb
  • Shipping Dimensions: 23.6 x 31.5 x 11.8 in
  • 10-year warranty, extendable up to 20-years.

Reviews & Questions

  • Reviews (2)
  • Questions (3)
Everyone was knowledgeable and pleasant to work with and did a good job of responding to various questions about technical issues of the product.
11/09/2020 04:01 pm
Very professional and we love our electric bill.
08/18/2020 11:11 am

Leave a review

Does this have an ethernet interface?
Captain Morgan
09/02/2021, 08:41
Yes, the device has this feature.
Does it use a fan for cooling? Is it very loud?
Chris Khan
08/18/2021, 11:40
Yes, this model has a fan. Typical noise emission is lower than 36 dB, which is much quieter than an average refrigerator.
What is the best type of battery to use with this inverter?
J. Collins
08/05/2021, 14:39
This model is compatible with Li-Ion batteries.