SMA STP 15000TL Installation - Manual (Page 18)

Product Description SMA Solar Technology AG
18 STP20TLHE-IA-IEN122222 Installation Manual
4.3 DC switch-disconnector
The DC switch-disconnector is optional. If you have ordered the inverter with DC switch-disconnector,
it will be pre-installed in the inverter on delivery.
Using the DC switch-disconnector, you can manually close or interrupt the electric circuit between the
PV array and the inverter. The DC switch-disconnector enables safe disconnection of the inverter from
the PV array. The disconnection takes place at all poles.
4.4 Communication
The inverter is equipped with a Bluetooth interface as standard. A multi-function relay and an
additional communication interface (e.g. RS485) can be retrofitted. The inverter can communicate
with special SMA communication products (e.g. data logger, software) or other inverters via the
communication interfaces (for information on supported communication products, see
www.SMA.de/en). You can only set the inverter's parameters using SMA communication products.
If you communicate via Bluetooth, you can protect the inverter with a plant password for the user and
a plant password for the installer. All inverters are delivered with the same factory-installed plant
passwords. You must change plant passwords using a communication product in order to protect the
PV plant from unauthorised access.
If you do not communicate via Bluetooth, deactivate the Bluetooth communication
(see Section 6.6.1 "Bluetooth" (page 50)). This protects your PV plant from unauthorised access.
Grid relay When the grid relay is closed, the inverter feeds into
the grid. When the grid relay is open, the inverter is
disconnected from the electricity grid.
Electricity grid ‒
Various parameter displays
Depending on the type of communication, RS485 or Bluetooth, the parameters and
messages are displayed differently on the communication products.
Example: parameter display for testing the fan
• If you are using RS485: parameter "CoolSys.FanTst"
• If you are using Bluetooth: parameter "Fan test"
Symbol Designation Explanation