SMA Smartformer for Sunny Island Inverters


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Product information

The SMA Smartformer makes it easy to configure slip-phase off-grid systems up to 7000 Watts. It is compatible with SMA Sunny Island inverters SI 4548-US and SI 6048-US. The Smartfromer also functions as an AC distributor and 120/240 Volt autotransformer. 

Using a Sunny Boy inverter and a Sunny Island, the Smartformer can step-down or step-up to become a 120V or 240V power source with minimal efficiency loss.

The pre-wired bypass function will bridge the PV systems to perform maintenance. The smart former also includes overload protection and load shedding contractor to prevent battery over discharge.

Some of the Smartformer features include, pre-wired AC distribution board, bypass switch for direct grid operation and miniature circuit-breaker for PV and load. The Smartformer is UL listed and comes standard with a 5-Year warranty.

SMA America started in Germany in 1981 and is a pioneer in photovoltaics power conversion. Today they are the number one inverter manufacturer worldwide with presence in 15 different countries, including the United States and Canada. In 2011 they opened the solar academy in California to help installers understand SMA’s technology and bring that knowledge to the home of thousands of homeowners in the US.

SMA staples include the Sunny Island inverters for off-grid and remote applications and the Sunny Boy inverters for residential and small commercial applications. In recent years they added the Tripower line of commercial inverters ranging from 12kW to 30kW per unit. Some of their inverters are assembled in Colorado and qualify for the ARRA Recovery Act. All their units are UL listed and comply with the most recent requirements in the National Electric Code (NEC).

SMA America has raised the bar in the solar industry for over 30 years and they continue to do so. They cover a wide range of applications and system sizes. The new inverter models with grid-tie applications come with multiple MPPT channels that will provide increased flexibility for your design and the length of you PV strings. This is a required feature when working with challenging roofs such as odd shapes or significant shading.

Additionally, SMA provides their Sunny Portal free of charge to SMA users. It is one of the most advanced energy communication platforms; all SMA inverters can transfer production data to the Sunny Portal. The portal is accessible to system owners via the Internet, where they can view and monitor their system’s performance in great detail.

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SMA Smartformer

Specs for SMA Smartformer SI-TD-BOX-10 for Sunny Island Inverters

Download datasheet
List of Pre Wired Systems

Note: Price includes shipping within continental US.

Midnite Part NumberSystem VoltageNominal PowerCharge ControllerInverter / ChargerApplication TypePrice**
MNXWP5548-UPS48 V5500 WNoneXW5548UPS$5,044
MNXWP6848-UPS48 V6800 WNoneXW6848UPS$5,756
MNSW2524-UPS24 V2500 WNoneSW2524UPS$3,029
MNSW4024-UPS24 V4000 WNoneSW4024UPS$3,179
MNSW4048-UPS48 V4000 WNoneSW4048UPS$3,330
MNXWPAC554848 V5500 WNoneXW5548AC Coupled$5,317
MNXWPAC5548-CL15048 V5500 WClassic 150XW5548AC Coupled$6,085
MNXWPAC5548-CL20048 V5500 WClassic 200XW5548AC Coupled$6,100
MNXWPAC5548-CL25048 V5500 WClassic 250XW5548AC Coupled$6,247
MNXWPAC5548-RSS48 V5500 WNoneXW5548AC Coupled$5,517
MNXWPAC6848 48 V6800 WNoneXW6848AC Coupled$5,871
MNXWPAC6848-CL15048 V6800 WClassic 150XW6848AC Coupled$6,594
MNXWPAC6848-CL20048 V6800 WClassic 200XW6848AC Coupled$6,609
MNXWPAC6848-CL25048 V6800 WClassic 250XW6848AC Coupled$6,756
MNXWPAC6848-RSS48 V6800 WNoneXW6848AC Coupled$6,070
MNXWPAC5548D48 V11000 WNoneXW5548AC Coupled$10,170
MNXWPAC5548D-CL15048 V11000 WClassic 150XW5548AC Coupled$10,937
MNXWPAC5548D-CL20048 V11000 WClassic 200XW5548AC Coupled$10,952
MNXWPAC5548D-CL25048 V11000 WClassic 250XW5548AC Coupled$11,100
MNXWPAC5548D-2CL15048 V11000 WClassic 150 (x2)XW5548AC Coupled$11,660
MNXWPAC5548D-2CL20048 V11000 WClassic 200 (x2)XW5548AC Coupled$11,690
MNXWPAC5548D-2CL25048 V11000 WClassic 250 (x2)XW5548AC Coupled$11,985
MNXWPAC5548D-RSS48 V11000 WNoneXW5548AC Coupled$10,502
MNXWPAC6848D48 V13600 WNoneXW6848AC Coupled$11,273
MNXWPAC6848D-CL15048 V13600 WClassic 150XW6848AC Coupled$12,040
MNXWPAC6848D-CL20048 V13600 WClassic 200XW6848AC Coupled$12,055
MNXWPAC6848D-CL25048 V13600 WClassic 250XW6848AC Coupled$12,203
MNXWPAC6848D-2CL15048 V13600 WClassic 150 (x2)XW6848AC Coupled$12,764
MNXWPAC6848D-2CL20048 V13600 WClassic 200 (x2)XW6848AC Coupled$12,793
MNXWPAC6848D-2CL25048 V13600 WClassic 250 (x2)XW6848AC Coupled$13,088
MNXWPAC6848D-RSS48 V13600 WNoneXW6848AC Coupled$11,605
MNXWP5548-CL15048 V5500 WClassic 150XW5548Off-Grid / Grid-Tie with Battery Backup$6,059
MNXWP5548-CL20048 V5500 WClassic 200XW5548Off-Grid / Grid-Tie with Battery Backup$6,074
MNXWP5548-CL25048 V5500 WClassic 250XW5548Off-Grid / Grid-Tie with Battery Backup$6,221
MNXWP5548-2CL15048 V5500 WClassic 150 (x2)XW5548Off-Grid / Grid-Tie with Battery Backup$6,871
MNXWP5548-2CL20048 V5500 WClassic 200 (x2)XW5548Off-Grid / Grid-Tie with Battery Backup$6,900
MNXWP5548-2CL25048 V5500 WClassic 250 (x2)XW5548Off-Grid / Grid-Tie with Battery Backup$7,196
MNXWP5548-CL150-RSS48 V5500 WClassic 150XW5548Off-Grid / Grid-Tie with Battery Backup$6,258
MNXWP6848-CL15048 V6800 WClassic 150XW6848Off-Grid / Grid-Tie with Battery Backup$6,612
MNXWP6848-CL20048 V6800 WClassic 200XW6848Off-Grid / Grid-Tie with Battery Backup$6,627
MNXWP6848-CL25048 V6800 WClassic 250XW6848Off-Grid / Grid-Tie with Battery Backup$6,775
MNXWP6848-2CL15048 V6800 WClassic 150 (x2)XW6848Off-Grid / Grid-Tie with Battery Backup$7,424
MNXWP6848-2CL20048 V6800 WClassic 200 (x2)XW6848Off-Grid / Grid-Tie with Battery Backup$7,454
MNXWP6848-2CL25048 V6800 WClassic 250 (x2)XW6848Off-Grid / Grid-Tie with Battery Backup$7,749
MNXWP6848-CL150-RSS48 V6800 WClassic 150XW6848Off-Grid / Grid-Tie with Battery Backup$6,812
MNXWP5548D-CL15048 V11000 WClassic 150XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$10,911
MNXWP5548D-CL20048 V11000 WClassic 200XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$10,926
MNXWP5548D-CL25048 V11000 WClassic 250XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$11,074
MNXWP5548D-2CL15048 V11000 WClassic 150 (x2)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$11,723
MNXWP5548D-2CL20048 V11000 WClassic 200 (x2)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$11,753
MNXWP5548D-2CL25048 V11000 WClassic 250 (x2)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$12,048
MNXWP5548D-3CL15048 V11000 WClassic 150 (x3)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$12,535
MNXWP5548D-3CL20048 V11000 WClassic 200 (x3)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$12,579
MNXWP5548D-3CL25048 V11000 WClassic 250 (x3)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$13,022
MNXWP5548D-4CL15048 V11000 WClassic 150 (x4)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$13,347
MNXWP5548D-4CL20048 V11000 WClassic 200 (x4)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$13,406
MNXWP5548D-4CL25048 V11000 WClassic 250 (x4)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$13,996
MNXWP5548D-2CL150-RSS48 V11000 WClassic 150 (x2)XW5548 (x2)Off-Grid / Grid-Tie with Battery Backup$12,122
MNXWP6848D-CL15048 V13600 WClassic 150XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$12,015
MNXWP6848D-CL20048 V13600 WClassic 200XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$12,029
MNXWP6848D-CL25048 V13600 WClassic 250XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$12,177
MNXWP6848D-2CL15048 V13600 WClassic 150 (x2)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$12,826
MNXWP6848D-2CL20048 V13600 WClassic 200 (x2)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$12,856
MNXWP6848D-2CL25048 V13600 WClassic 250 (x2)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$13,151
MNXWP6848D-3CL15048 V13600 WClassic 150 (x3)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$13,638
MNXWP6848D-3CL20048 V13600 WClassic 200 (x3)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$13,683
MNXWP6848D-3CL25048 V13600 WClassic 250 (x3)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$14,125
MNXWP6848D-4CL15048 V13600 WClassic 150 (x4)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$14,450
MNXWP6848D-4CL20048 V13600 WClassic 200 (x4)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$14,509
MNXWP6848D-4CL25048 V13600 WClassic 250 (x4)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$15,099
MNXWP6848D-2CL150-RSS48 V13600 WClassic 150 (x2)XW6848 (x2)Off-Grid / Grid-Tie with Battery Backup$13,225
MNSW2524-KID-B24 V2500 WKID-BSW2524Off-Grid$3,291
MNSW2524-KID-B-RSS24 V2500 WKID-BSW2524Off-Grid$3,491
MNSW4024-KID-B24 V4000 WKID-BSW4024Off-Grid$3,443
MNSW4024-KID-B-RSS24 V4000 WKID-BSW4048Off-Grid$3,642
MNSW4048-KID-B48 V4000 WKID-BSW4048Off-Grid$3,594
MNSW4048-KID-B-RSS48 V4000 WKID-BSW4048Off-Grid$3,793
MNSW2524-CL15024 V2500 WClassic 150SW2524Off-Grid$3,849
MNSW2524-CL20024 V2500 WClassic 200SW2524Off-Grid$3,863
MNSW2524-CL25024 V2500 WClassic 250SW2524Off-Grid$4,011
MNSW2524-CL150-RSS24 V2500 WClassic 150SW2524Off-Grid$4,048
MNSW4024-CL15024 V4000 WClassic 150SW4024Off-Grid$4,000
MNSW4024-CL20024 V4000 WClassic 200SW4024Off-Grid$4,015
MNSW4024-CL25024 V4000 WClassic 250SW4024Off-Grid$4,162
MNSW4024-CL150-RSS24 V4000 WClassic 150SW4024Off-Grid$4,192
MNSW4048-CL15048 V4000 WClassic 150SW4048Off-Grid$4,148
MNSW4048-CL20048 V4000 WClassic 200SW4048Off-Grid$4,162
MNSW4048-CL25048 V4000 WClassic 250SW4048Off-Grid$4,310
MNSW4048-CL150-RSS48 V4000 WClassic 150SW4048Off-Grid$4,354

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SMA Smartformer for Sunny Island Inverters

SMA Smartformer for Sunny Island Inverters

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