Product Description SMA Solar Technology AG
14 STP10-17TL-IEN102611 Installation Guide
3 Product Description
The Sunny Tripower is a multi-string inverter which converts the DC current of a PV generator into AC
current. To do this, it is equipped with 2 separate MPP trackers which can be connected to different
PV modules. Power is fed to the public grid in three-phase. Cooling is carried out by the cooling system
OptiCool, whereby a fan is integrated on the underside and on the left side of the enclosure.
In addition, Sunny Tripower is equipped with the features described below.
3.1 Overvoltage Protectors Type II
Alongside the standard, thermally controlled varistors, the Sunny Tripower is equipped with module
plug-in slots for connecting additional overvoltage protectors of type II. The modules are monitored
when plugged in. If a module triggers, a warning will come up on the display or in the external
communication (e.g. Sunny WebBox or Sunny Explorer). This makes it easy to integrate the Sunny
Tripower into a lightning protection concept. The necessary modules are available as retrofit kits for
input A or input A+B.
3.2 Auto-adaptive Identification of String Failure
The Sunny Tripower is equipped with a system which recognizes total failure of individual strings or
part-strings (see following figure). For this system to function reliably, at least 2 string inputs on the
Sunny Tripower must be occupied. With a PV module system of approx. 1 A, monitoring of up to 6
part-strings per string input is possible. One advantage of this system is that its auto-adaptive function
completely eliminates the necessity of any configuration. A learning curve of approx. 14 days from
initial activation is required by the Sunny Tripower in moderate irradiation. If string failure occurs, a
warning will come up on the display or in the external communication (e.g. Sunny WebBox or Sunny
Explorer).
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