UNO-DM-3.3/3.8/4.6/5.0TL-PLUS-US-Q Data sheet
String inverter - UNO-DM-3.3/3.8/4.6/5.0-TL-PLUS-US-Q
UNO-DM-3.3/3.8/4.6/5.0-TL-PLUS-Q string inverter block diagram
One size fits all 
The design wraps FIMER’s quality and engineering into a
lightweight and compact package thanks to technological choices 
optimized for installations with different orientation.
All power ratings share the same overall volume, allowing higher 
performance in a minimum space, and have a dual Maximum 
Power Point Tracker (2 MPPT).
Easy to install, fast to commission 
The wireless communication, enables a simple, fast and safe 
installation without the need of opening the front cover of the 
inverter.
The featured easy commissioning routine removes the need for a 
long configuration process, resulting in lower installation time and 
costs.
Improved user experience thanks to a build in User Interface (UI), 
which enables access to features such as advanced inverter 
configuration settings, dynamic feed-in control and load manager, 
from any WLAN enabled devices (smartphone, tablet or PC).
Smart capabilities 
The embedded logging capabilities and direct transferring of the data 
to Internet (via Ethernet or WLAN) allow customers to enjoy the whole 
Aurora Vision remote monitoring experience. 
The advanced communication interfaces (WLAN, Ethernet, RS485) 
combined with an efficient Modbus (RTU/TCP) communication 
protocol, Sunspec compliance, allow the inverter to be easily
integrated within any smart environment and with third party
monitoring and control systems.
A complete set of control functions with the embedded efficient 
algorithm, enabling dynamic control of the feed-in (i.e. Zero
Injection), make the inverter suitable for worldwide applications in 
compliance with regulatory norms and needs of the utilities.
The future-proof and flexible design enables integration with current 
and future devices for smart building automation.
Module Level Rapid Shutdown (RSD)
UNO-DM-PLUS now offers an integrated solution to comply with the 
safety requirements of de-energizing a PV system at the module level. 
With a built-in SunSpec certified transmitter, the unit can send a 
powerline signal, to the modules, providing the fastest and most 
reliable way to be compliant with NEC 2017 and NEC 2020 (690.12) 
requirements. 
FIMER allows the customer to choose between the standard model 
allowing for field-installation of the Rapid Shutdown in the wire box, or 
the integrated RSD wire-box for an agnostic solution compatible with 
SunSpec compliant receivers.
Energy Viewer 
This tool allows residential customers to remotely monitor the 
performance of their own solar plant.
Highlights
•  Wireless access to the embedded Web User Interface
•  Easy commissioning with QR code access 
•  UL 1741 SA compliant
•  Future-proof with embedded connectivity for smart building and 
smart grid integration
•  Remote Over The Air (OTA) firmware upgrade for inverter and 
components
•  Modbus TCP/RTU Sunspec compliant
•  Remote monitoring via Aurora Vision cloud 
•  Dual input section with independent MPPT
•  Integrated rapid shutdown power supplier (String level RSD)
•  Integrated module level RSD PLC transmitter (specific version)
•  FIMER PowerGain Hardware and Software optimization per MPPT
IN1
IN2
+
-
+
-
IN1
+
-
IN2
+
-
MPPT 2
(DC/DC)
MPPT 1
(DC/DC)
Bulk caps 
Inverter
(DC/AC)
Line
filter
Grid parallel 
relay
L1
L2
PE
Residual current
detection
RS485
+ T/R
- T/R
RTN
Remote control*
+ R
- R
Load manager / 
Alarm
N.C
N.O
C
Ground
fault
detection
N
* Remote control function not available on -A version
IN1
IN2
+
-
+
-
DC
AFDI
IN1.1(+)
IN1.2(+)
IN1.1(-)
IN1.2(-)
IN1
IN2
+
-
+
-
IN2.1(+)
IN2.2(+)
IN2.1(-)
IN2.2(-)
IN1
IN2
+
-
+
-
 Wiring box
IN1
IN2
+
-
+
-
Optional 
5)
RSD(+)
RSD(-)
RSD(+)
RSD(-)
DC/DC
DSP
contr.
DC/AC
DSP
contr.
µP
Control Circuit
WLAN
RSD(+)
RSD(-)




