SMA SUNNY TRIPOWER X 20-US - Digital Inputs; Device Key (DEV KEY); Grid Management Services; SMA Shadefix

4 Product Overview
SMA Solar Technology AG
Operating manual STPxx-US-50-BE-en-11 25
4.5.7 Digital inputs
The product is equipped with digital inputs as standard.
Digital input DI 1-4 is intended for connection of an external signal source for active power
limitation.
Digital input DI 5-6 is intended for connection of an external signal source for fast stop.
4.5.8 Device Key (DEV KEY)
If you have forgotten the administrator password for the product, you can reset the administrator
account with the Device Key and assign a new password. The Device Key can be used to prove the
identity of the product in digital communication. The Device Key is located on the back of the quick
reference guide that comes with the product. Keep the Device Key safe in case you forget the
administrator password.
4.5.9 Grid Management Services
The inverter is a grid support interactive inverter.
The inverter was tested in accordance with UL 1741SB / IEEE 1547-2018 (10/2022) to be
compliant with the source requirements documents of the states available at the time of the test.
For connecting the inverter to the utility grid, no additional grid monitoring equipment is necessary.
4.5.10 SMA ShadeFix
The inverter is equipped with the shade management system SMA ShadeFix. SMA ShadeFix uses
an intelligent MPP tracking system to determine the operating point with the highest output during
shading conditions. With SMA ShadeFix, inverters use the best possible energy supply from the PV
modules at all times to increase yields in shaded systems.
SMA ShadeFix is disabled by default, and can be enabled if required.
The time interval of SMA ShadeFix is usually 6 minutes. This means that the inverter determines the
optimum operating point every 6 minutes. Depending on the PV system or shading situation, it may
be useful to adjust the time interval.
4.5.11 Surge arrester type 1+2 or type 2
The inverter has a DIN rail that serves as a mounting location for the DC overvoltage protection.
The DC overvoltage protection with surge protection devices of the type1+2 or type2 is available
as an accessory. The surge protection devices limit dangerous overvoltages.
4.5.12 Rapid Shutdown Equipment
The inverter is listed as PV Rapid Shutdown Equipment (PVRSE) according to UL 1741.
All DC inputs and AC outputs of this product comply with photovoltaic rapid shutdown requirements
for controlled conductors outside the array.
A complete PV Rapid Shutdown System (PVRSS) consists of the PV inverter, PV array disconnect
switches, and a Rapid Shutdown initiation device. The Rapid Shutdown initiation device serves to
initiate a rapid shutdown. The PV Rapid Shutdown System must limit the DC conductors to <30V
within 30seconds.