SMA SB 240-US-10 Sunny Boy 240W Micro Inverter

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SMA SB 240-US-10 Sunny Boy 240W Micro Inverter

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SMA SB 240-US-10 Summary
Grid-Tied - Microinverter

SMA SB 240-US-10 Sunny Boy 240W Micro Inverter

SB 240-US-10 Sunny Boy 240W Micro Inverter

SMA’s Sunny Boy micro inverter system enhances design flexibility for installers in the U.S. and across the globe. It features industry-leading 96% CEC efficiency, simple installation, an innovative communications platform and is especially applicable for residential systems and rooftops with complex, shaded situations.  An improved cabling concept further elevates the Sunny Boy 240 from the competition by eliminating the need for a trunk cable.

Optimized Reliability

  • Industry-leading 96% CEC efficiency
  • Multigate technology allows for reduced component count
  • Private band powerline for highly reliable communications
  • Overvoltage protection enhances durability

Simple Installation

  • Ideal for complex roofs
  • Pre-assembled AC plugs and connection cables
  • Multiple DC connector options and daisy chain configuration

Unrivaled Monitoring

  • The Sunny Multigate is a reliable, distortion-free solution
  • Module-level, customized reporting through Sunny Portal
  • Remote monitoring via the Internet or iPhone and Android apps

SMA-Backed Security

  • 30-year history and strong financials create stability and ensure full warranty support
  • German engineered, assembled in the USA for unmatched quality
  • #1 ranked service offering

Also Known As:

Also Known As:

 Sunny Boy 240-USSunny Multigate-US

Input (DC)
Max. DC power (@ cos φ = 1)250 WN / A
Max. number of micro invertersN / A 
Max. input voltage45 VN / A
MPP voltage range / rated input voltage23 V ...32 V / 29.5 VN / A
Min. input volatge / start voltage15 V / 23 VN / A
Max. input current8.5 AN / A
Max. input current per string8.5 AN / A
Number of independent MMP inputs /
String per MPP input
1 / 1 (Unfused)N / A

Output (AC)
Rated power (@ 240 V. 60 Hz)240 WN / A
Max. apparent AC power240 VA2880 VA / 2880 W
Nominal AC voltage / range2 x 120 V / 211 V - 264 V2 x 120 V / 211 V - 264 V
AC power frequency / range60 Hz; 59.3 — 60.5 Hz60 Hz; 59.3 — 60.5 Hz
Rated power frequency / rated grid voltage60 Hz / 240 V60 Hz / 240 V
Max. ouput current1 A12 A
Power factor at rated power11
Feed-in phases / connection phases2 / 2 X 120 V split phase-  / 2 X 120 V split phase

Max. efficiency95.9%99.9%
CEC efficiency96%N / A

Protection devices    
Ground fault monitoring / grid monitoringyesN / A
DC reverse polarity / AC short-circuit
current capability / galvanically isolated
yes / yes / yesN / A
Grid monitoring /
AC short-circuit current capability
N / AN / A
Max. permissible fuse protectionN / A15 A Circuit Breaker

General Data
Dimensions (W / H / D)188.4 / 218.4 / 43.7 mm
(7.4 / 8.6 / 1.7 im)
162 / 90 / 63 (6.4 / 3.5 / 2.5)
Weight1.3 kg / 2.9 lbs.07 kg / 1.5 lb
Operating temperature range—40 °C ... +65 °C
(—40 °F ... +149 °F)
—40 °C ... +45 °C
(—40 °F ... +113 °F)
TopologyHF transformerN / A
Cooling conceptConvectionConvection
Degree of protection (according to IEC 60529)NEMA 3RType 1
Max. permissible value for
relative humidity (non-condensing)
100%N / A

DC ConnectionConnectorN / A
AC ConnectionConnectorScrew terminal
Interface: WebconnectN / Ayes
Certificates and permits
(more available on request)
UL1741, UL1998, IEEE 1547, FCC Part 15 (Class A & B), IEC 62109-1/-2 (CAN/CSA C22.2 No. 107.1-1)
Data at nominal conditions  
Type designationSB 240-US-10Multigate-US-10
Note: Specifications and pricing of the SMA SB 240-US-10 Sunny Boy 240W Micro Inverter subject to change without notice. Illustrations and descriptions of the SMA SB 240-US-10 do not claim to be complete or exhaustive.

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