SMA SI-TD-BOX Smartformer 120/240V Transformer Distribution Box
List Price: $2,570.00
Price: $1,721.91 $1,688.11
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SMA SI-TD-BOX Summary
Product Type
Transformer

SI-TD-BOX Smartformer 120/240V Transformer Distribution Box

SMA SI-TD-BOX Smartformer 120/240V Transformer Distribution Box

The Smartformer is the complete solution for off-grid and battery back-up systems up to eight kilowatts. It acts simultaneously as AC distribution and a 120 V/240 V autoformer. The autoformer provides step-up and step-down options to supply loads with 120 V and 240 V using a Sunny Island and a Sunny Boy, with high efficiency over the entire power spectrum. Thanks to the pre-wired bypass function, the PV system can be easily bridged via a robust switch for maintenance. The optimized transformer overload protection and a load shedding relay provide extra protection to the system. The Smartformer makes the stand-alone power supply simple and reliable.

Features of the SMA SI-TD-BOX Smartformer 120/240V Transformer Distribution Box:

Simple

  • Pre-wired AC distribution board
  • Fast installation and commissioning

Complete

  • Bypass switch for direct grid operation
  • Load shedding relay to prevent deep battery discharge
  • Miniature circuit breakers for PV and load

Efficient

  • Maximum efficiency of 99%

Safe

  • UL certified
  • Optimized overload protection
  • 5-year standard warranty, extebdable to 20 years

Also Known As:
SI.TD.BOX
SI TD BOX
SI_TD_BOX
SITDBOX

Technical DataSI-TD-BOXSmartformer

General data
Number of phasesSplit-phase
Rated voltage120 Vac/240 Vac
AC voltage range between L1 and N102 V - 132 V
AC voltage range between L1 and L2204 V - 264 V
Rated frequency60 Hz
Dimensions (width x height x depth)24.02 x 24.02 x 9.25 in (610 x 610 x 235 mm)
Weightapprox. 123.5 lbs (approx. 56 kg)
Idle power consumption19 W (typical)
Rated power transformer3.4 kVA
Max. efficiency/CEC efficiency99% / 98.8%
Transformer AC power for 30 min4.4 kVA
Transformer AC power for 1 min8.8 kVA
Conduit accessKnockouts top: 2x 3/4”, 2x 1”, 2x 1 1/4”
bottom: 5x 3/4”, 3x 1”, 3x 1 1/4”

Connections for Sunny Island
Maximum number and nominal voltage of Sunny Island1 x 120 V (L1, N)
Rated power5.8 kW
Current at rated values48 A
Fuses1

PV plant connection
Number of connections/nominal voltage1 x 240 V (L1, L2, N)
Rated power9.6 kW
AC power in parallel grid operation6 kW
AC current at rated values40 A
Fuses2

Load connection
Number of connections/rated voltage1 x 120 V/240 V
Rated power7.2 kW
AC power at 40 °C6.6 kW
Rated power / current between L₁ and L₂6.7 kW / 28 A
Rated power / current between L₁ and N3.8 kW / 32 A
Rated power / current between L₂ and N3.4 kW / 28 A
Current at rated values32 A, 28 A (with activated bypass: 2 x 48 A)
FuseK40A (with activated bypass: K60A)

PV array connection
Number of connections/rated voltage120 V / 240 V (L1, L2, N)
Rated grid input power11.5 kW
AC input current48 A
Fuse2

Ambient conditions
Operating temperature range-13 °F ... +140 °F (-25 °C ... +60 °C)
Humidity0 - 100% (non-condensing)
Protection classNEMA Type 1
Certification and approvalUL 1741

Features/function
Warranty: 5/10/15/20 yearsyes/opt./opt./opt.
Integrated bypass for maintenance/load shedding relay/transformer protectionyes/yes/yes
Type designationSI-TD-BOX-10

Important note for the SMA SI-TD-BOX Smartformer 120/240V Transformer Distribution Box

Shipping Note: Due to the oversized nature of this product, freight is the only shipping method available. You may proceed with an order online and we will contact you prior shipping this item or please Contact Us and we will work to get you the exact shipping cost.
Note: Specifications and pricing of the SMA SI-TD-BOX Smartformer 120/240V Transformer Distribution Box subject to change without notice. Illustrations and descriptions of the SMA SI-TD-BOX do not claim to be complete or exhaustive.
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Manufacturer Info
SMA
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