SMA SUNNY TRIPOWER 12000TL-US, Installation Manual

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2 Safety
2.1 Intended Use
The Sunny Tripower is a transformerless PV inverter with two MPP trackers which converts the direct
current of the PV array to grid-compliant three-phase current and feeds it into the utility grid.
No galvanic isolation
• The product is not equipped with a transformer and therefore has no galvanic isolation.
Do not use grounded PV modules with the product. Only ground the mounting frame of
the PV modules. If you connect grounded PV modules to the product, the error message
Insulation resistance > Check generator occurs.
• The AC output/neutral conductor is not bonded to ground inside of the product.
The product is suitable for indoor and outdoor use.
The Sunny Tripower must only be operated with PV arrays (PV modules and cabling) that are
approved by the electrical standards applicable on-site and the
National Electrical Code
®
ANSI/
NFPA 70 or the
Canadian Electrical Code
®
CSA C22.1. The PV modules used must be suitable for
use with the Sunny Tripower.
SMA offers the SMA Connection Unit which is equipped with fuse holders for string fuses for up to
eight strings and with a DC load-break switch. The SMA Connection Unit combines up to four
strings to each of two output circuits. These two DC electric circuits can be connected to the two
MPP tracker inputs of the Sunny Tripower (for further information see the installation manual of the
SMA Connection Unit-US at www.SMA-Solar.com).
PV modules with a high capacity to ground may only be used if their coupling capacity does not
exceed 3.5 μF.
All components must remain within their permitted operating ranges at all times.
To protect the PV system against excessive reverse currents under fault conditions, the
National
Electrical Code
®
, Section 690.9, requires overcurrent protection for PV source circuits where
possible short-circuit currents exceed the ampacity of source circuit conductors or the maximum
series fuse rating of the PV modules. Typically, this requires string fusing where more than two
strings are combined in parallel. Where overcurrent protection is required,
National Electrical
Code
®
, Section 690.35, requires that both positive and negative conductors have overcurrent
protection for ungrounded PV arrays.
The product must only be used in countries for which it is approved or released by SMA and the
grid operator.
The product is not equipped with a transformer and therefore has no galvanic isolation. Do not use
grounded PV modules with the product. Only ground the mounting frame of the PV modules. If you
connect grounded PV modules to the product, the error message
Insulation resistance > Check
generator occurs.
Use this product only in accordance with the information provided in the enclosed documentation
and with the locally applicable standards and directives. Any other application may cause
personal injury or property damage.
2 Safety SMA Solar Technology America LLC
Installation Manual STPTL-US-10-IA-xx-17 10
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