SMA Smartformer for Sunny Island, Transformer and Distribution Box for operation of 120/240 V, 60 Hz split-phase loads SI-TD-BOX


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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 120/240 V autoformer. The autoformer provides step-up and stepdown 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.

SMA Off-Grid Power Supply Systems

This product is shipped from one of our warehouses in Northern California. Orders placed after 12 p.m. will typically ship the following business day. To see an estimate of our delivery times, click here.

Returns & Replacements
If you are not satisfied with your purchase, you may return the product within 30 days for a replacement or a refund of the product value. Products must be unused in re-sellable condition with all original packaging, paperwork and accessories.

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