SMA SI-TB-BOX-10 - Manual (Page 13)

SMA America, LLC 2 Safety
Installation Manual SI_TDBOX-IA-eng-IUS122211 13
Electrical connection requirements:
The Smartformer must only be used with the following Sunny Island inverters:
• Sunny Island 4548‑US / 6048‑US
• Sunny Island 5048-US with labeling "Smartformer compatible" on the original packaging
Sunny Island 5048-US inverters without labeling "Smartformer compatible" on the original
packaging require an additional fuse outside of the Smartformer for Sunny Island (see
Section 6.3 "Selecting Cables", page 36).
The Smartformer may be used with the following PV inverters by SMA:
• Sunny Boy 2000HF-US / 2500HF-US / 3000HF-US
• Sunny Boy 3000-US / 3800-US / 4000-US
• Sunny Boy 5000-US / 6000-US
• In off-grid systems: Sunny Boy 7000-US / 8000-US
A generator or the power distribution grid may be connected to the Smartformer. The generator or
the power distribution grid may supply the Sunny Island system with 120 V on 1 line conductor or
with 240 V on 2 line conductors. A generator and the power distribution grid may only be connected
to the Smartformer at the same time if used with an external automatic transfer switch.
General terms of use:
Only use the Smartformer in accordance with the information provided in the enclosed
documentation. Any other use can result in personal injury or property damage.
The enclosed documentation is an integral part of this product.
• Read and adhere to the documentation.
• Keep the documentation in a convenient place for future reference.
Do not operate the Smartformer if it has technical defects.
For safety reasons, it is forbidden to modify the product or install components that are not explicitly
recommended or distributed by SMA.
2.2 Qualification of Skilled Workers
The tasks described in this document are intended for skilled workers only. Skilled workers must have
the following skills:
• Knowledge about the functional principle and operation of off-grid systems and backup systems
• Knowledge of how to deal with the dangers and risks associated with installing and using
electrical devices
• Knowledge of the installation and commissioning of electrical devices
• Knowledge of all applicable standards and guidelines
• Knowledge of and adherence to this document and all safety precautions