Request a Quote!

" is the best! They are such a pleasure to work with! Great brands at the best prices. Special thanks to RenĂe who always answered my questions on the spot, and giving thoughtful advice." Serge (Tahiti, French Polynesia)
"The experience I had with my purchase was very good. The items I ordered arrived when I expected & were packaged well. My overall purchasing experience was very positive."

- Thank you,
"I recently found EcoDirect & have been extremely happy with their service. They have had all the PV modules, inverters, optimizers and accessories I needed. They provide excellent customer service & turn orders around very quickly. I have switched to EcoDirect for all my parts & materials orders. Highly recommended."

- Zeno
"I wanted to let you know I am very pleased with the service you gave & the quality & condition of the solar panels I received from EcoDirect. I will purchase more items in the future from EcoDirect and will be sure to tell others about your fine operation."

"Thanks EcoDirect! My solar system is up and running; waiting for City and San Diego Gas & Electric inspections this week; so far so good!"

- J.L.,
Oceanside, CA
"I enjoyed ordering what I needed. It was simple and fast, no issues what so ever. If I need something else and its at a good price, I will defiantly order from here again. Also the shipping is at a good price."

- Simon
My shipment arrived on time, as predicted. Very, very good performance by EcoDirect. What more could you ask for from an online material supplier? Looks like the quantity from Quick Mount is spot on & the rails were bundled safely. EcoDirect will be my recommended source to my friends & neighbors for solar.
- Thank you, Jim Lake
Escondido, CA
"Over the past couple of years, I have purchased several items from Ecodirect and I have always been happy with their customer service and prompt delivery of products."

- Chris
"I am very satisfied, everything was as expected."

- Anon

  Home >

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

Warranty: 5 Years

Stock Status:(Out of Stock)
Availability: This product is no longer available.
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