In observance of Memorial Day, EcoDirect will be closed Monday, May, 28th.

We will still be accepting new orders during the holiday. Shipping delays may occur due to the holiday.
We will be returning Tuesday, May 29th.


Request a Quote!

  Home > Power Inverters > SMA Inverters > SMA Off Grid Inverters (Sunny Island) >

SMA SI-TD-BOX-10 > Smartformer for Sunny Island
SMA SI-TD-BOX-10 > Smartformer for Sunny Island

Our Price: $1,764.64
Warranty: 5 Years

Availability: Usually ships in 3 to 4 weeks. Call for availability.
Product Code: SMA-SI-TD-BOX-10

Description Datasheet

SMA SI-TD-BOX-10 > Smartformer for Sunny Island

Set up Split-Phase Grids - Easier Than Ever

Transformer, control, and AC breaker box for allowing a single Sunny Island inverter to AC couple with a Sunny Boy grid tie inverter at 240VAC.
Load shedding and AC bypass are also included.


Model SI-TD-BOX-10 / Smartformer
Series Sunny Island
Manufacturer SMA Solar
Compatible With Sunny Island Inverters


Data Sheet SMA SI-TD-BOX-10 Smartformer

Detailed Description

The Smartformer is the complete solution for off-grid and backup plants of up to seven kilowatts. At the same time, it acts as a AC distributor and a 120/240-volt autotransformer. The transformer 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 a high level of efficiency over the entire power spectrum. Thanks to the pre-wired bypass function, the PV plant can be bridged without problems via a robust switch for maintenance work. The optimized transformer overload protection and a load-shedding contactor provide extra protection to the system. The Smartformer makes the stand-alone power supply simple and reliable.


  • Pre-wired AC distribution board
  • Quick installation and commissioning
  • Suitable for SI 4548 / 6048-US


  • Bypass switch for direct grid operation
  • Load-shedding contactor to prevent battery deep discharge
  • Miniature circuit-breaker for PV and load


  • Max. efficiency: 99 percent
  • Highest yield in the entire power range


  • UL listed
  • Optimized overload protection
  • Warranty: 5 years as standard – extendable to 20 years

Share your knowledge of this product with other customers... Be the first to write a review

Browse for more products in the same category as this item:

Power Inverters > SMA Inverters > SMA Off Grid Inverters (Sunny Island)
Power Inverters
Power Inverters > SMA Inverters
48 VDC
Accessories > SMA Accessories