SOLAR MICRO INVERTER 260
COMMUNICATION GATEWAY
Apparent Power Control (APC)
P
Q
unique micro inverter with
REAL & REACTIVE POWER CONTROL
2
Micro Inverters
unique micro inverter with real & reactive power control
Main advantages
•
•
•
•
•
•
•
•
•
•
Apparent power control (APC)
Smart grid ready
Grid power quality improvement
Extremely precise MPPT algorithm
The best overall solar energy conversion
Compact waterproof design
Wireless communication
Very long life-time (25 years)
Fire safe installations
Three phase balanced installations with no
additional equipment for reactive power
compensation
• Integrated interface protection system
Applications
Micro, small and medium PV installations (residential, commercial / on-grid, off-grid with storage)
Typical applications
Multiple orientations and OPTIMAL USE
OF ROOF SURFACE
• Modularity
• Each panel MPPT
• Apparent power control
Partial shading
• Each panel MPPT
• Extremely precise MPPT
unique micro inverter with real & reactive power control
Micro Inverters
SMALL SPECIFIC SYSTEMS
• Single panel AC grid connection
• Modularity
string and micro inverter
Combined field applications
• Each panel MPPT
• Extremely precise MPPT
Pole mounted
• Apparent power control
• Grid power quality improvement
• Smart grid ready
CARPORTS
• AC compact fire safe solutions
Combination with E-MOBILITY
• Smart grid ready
• Fire safe installation
Off-grid
• Modularity
• AC battery
• Battery storage
3
Micro Inverters
unique micro inverter with real & reactive power control
THE MOST EFFICIENT
CONVERSION OF LIGHT
INTO ELECTRICITY
Advantages
of MI systems
• The best PV levelized cost of electricity
(LCOE) / Total cost of ownership (TCO)
in comparison with power optimizers
and string inverters.
• Up to 20 % higher energy yield compared
to string inverters due to individual panel
level shading optimization.
• No single point of failure. In case of
one inverter's malfunction, the others
continue generating energy.
• Low service cost, since inverters are
simply exchanged in case of failure.
• Modularly built-up system. It can be
enlarged gradually in time.
• Wireless monitoring and control. Each
panel's performance can be examined
and controlled through standard
WMBUS communication.
P - Q diagram
Reactive power generation from 0 to 260 VAr (cap., ind.)
• Safety:
• When operating, only a low DC voltage
(up to 50V) is present on the roof.
• In the event of fire and other hazards
inverters will switch off in max
2 seconds.
P
260 W
• Long life-time without maintenance
(25 years).
290 VA
App
aren
t Po
wer
• Simple and cost effective installation.
No high DC voltage on roof. Simple 230V
AC UL and VDE approved, IP67 rated, UV
resistant T connection cables used for
inverter interconnections.
Real Power
4
• Micro-grid suitable technology.
• Suitable for off-grid applications with
energy storage.
Q
-260 VAr
-125 VAr
125 VAr
Reactive Power
260 VAr
unique micro inverter with real & reactive power control
External
cloud server
l
ona
Persputer
com
ile
Mobne
pho
DC / AC
AC / DC
Micro Inverters
5
6
Micro Inverter
unique micro inverter with real & reactive power control
SOLAR Micro
Inverter
260
Features
• Reactive power control.
Dynamic power factor regulation.
• Power factor options:
• Unity (1),
• Fixed down to 0.8, capacitive/
inductive,
• Dynamic according to power or
grid voltage.
• Very low power needed to start the
inverter (< 2W).
• Foil capacitors are used, allowing
very long lifetime (25 years) and
high MTBF values (up to 600 years
MTBF).
• Electronics is designed with
automotive standard components,
ensuring easy implementation
of automated production with
automotive quality and traceability.
• Compact waterproof design.
• Internet access to panel data
through the communitation gateway
(WiFi, Ethernet gateway with
embbeded web server). The desired
real power and power factor can also
be set through the communitation
gateway allowing dynamic control
of micro grid performances and
adaptation to every grid quality.
• Extremely precise MPPT algorithm.
• Very low panel's DC ripple current
(50 mA).
• High efficiency.
• Integrated IPS (Interface Protection
System) /Anti-Islanding Protection.
• Optional: parallel connection of two
solar panels each with peak power up
to 140 W and max DC input voltage
up to 60 V (Double DC connector).
• Suitable for 60 and 72-cell panels up
to 310 Wp.
unique micro inverter with real & reactive power control
Micro Inverter
TECHNICAL CHARACTERISTICS
Parameters
Value
Recommended rated input DC power
200 W - 275 W
Max PV panel power
up to 310 Wp
Max DC input voltage
60 V
MPPT range
21 V-55 V
Min start voltage
21 V
Max DC short circuit current
12 A
Max input current
10.5 A
Operating range
15 V- 60 V
Nominal apparent AC power
290 VA
Nominal real AC power
260 W
Nominal reactive AC power (at power factor 0.9)
125 VAr
Max reactive power
0 – 260 VAR (cap., ind.)
Nominal output current
1.15 A
Frequency range
50 Hz (47.5 Hz-55 Hz)
According to standards
Voltage range 240 V systems
180 V – 270 V
According to standards
Reactive power regulation
1 (Unity)
0.8 cap. … 1 ... 0.8 ind.
Dynamic regulation
THD odd harmonics
<3%
Efficiency max.
96.1 %
Efficiency CEC/EURO
95.5 % / 95.3 %
MPPT efficiency
99.9 %
Panel's ripple current
50 mA
Ambient temperature
-40 °C … +65 °C
Cooling
Natural
Communication
WMBUS 868 Mhz (optional 915 Mhz)
Complies to
EN 50438, VDE 4105, CEI 0-21, G83/2, EN 62109-1, EN 62109-2,EN 61000-6-3,
EN 61000-6-1, RoHS
Lifetime expectancy
25 years
Limited warranty
25 years
Housing
Die casted aluminum
IP protection
IP67, completely potted (waterproof)
Dimensions (without mounting brackets)
209 x 221 x 40 mm
Mounting brackets
M8x16, distance 130 mm
Weight
cca 2 kg
AC connection system
Amphenol LTW VTC/Wieland RST
DC connection system
Amphenol LTW H4
Standby consumption
0W
Integrated Interface Protection System/Antiislanding protection
as for VDE 4105
7
8
EMBEDDED LINUX OPERATING SYSTEM
COMMUNICATION GATEWAY
communication
gateway
The communication gateway enables simple wireless monitoring and control
of each individual panel of a solar power plant from any web enabled device
through an intuitive graphical interface. Three-phase grid system can be
monitored and controlled with only one device.
Cloud server
Features
• Embedded linux operating system.
• RF, 868Mhz WMBUS
communication.
• Software stack complies to
EN 13757-1 … 5 and EN 870-5.
• Possibility to send special command
to the micro inverters (desired power
factor, desired generating power,
start-stop command).
• Collecting, storing and retransmitting
data to the service provider via
Wifi, Ethernet and GSM / GPRS
communications.
• Works with registered micro
inverters, which are filtered
by ID number.
• AES-128 encryption.
• WAN connectivity.
• Allows balancing of production and
consumption of electricity in micro
grid networks.
Internet connection
COMMUNICATION GATEWAY
EMBEDDED LINUX OPERATING SYSTEM
Monitoring
9
Controlling
• Web application compatible with
all platforms: PC, notebooks,
smartphones, tablets.
• Generated energy on each PV panel
(daily, weekly, monthly, yearly).
• Actual power from each PV panel.
• Each PV panel DC voltage and current.
• Each micro inverter AC output
current and voltage.
• Efficency of each PV panel.
• Presence of each PV panel.
• Faults on each panel.
• Internal temperature of each
micro inverter.
• Wake up and sleep time
of each micro inverter.
The power plant can be
monitored via notebook,
tablet and smartphone.
• Each micro inverter power.
• Each micro inverter power factor.
• Each micro inverter ON-OFF.
Main information:
• Overall energy
• Overall reduced CO2 emissions
• Earned / saved money
• Current power
• Alarms
Cloud server
• Data available for external
cloud server.
• Documented interface based on
https protocol allows access to real
time data for external cloud server.
SETTINGS
MAIN PAGE
LETRIKA
MANUAL / ABOUT
ON
STATUS
1600 W
1066.67 W
13.1 kWh
0.2 kWh
2.36 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
0W
00:00
08:00
12:00
20:00
16:00
00:00
13.1 kWh
0.2 kWh
2.36 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
A3
A4
0.4 MWh
184 W
3.3 MWh
185 W
3.2 MWh
179 W
0W
00:00
04:00
08:00
12:00
16:00
20:00
VIEW:
00:00
PHYSICAL LAYOUT
A2
A3
A4
A5
0.4 MWh
184 W
3.3 MWh
185 W
3.2 MWh
179 W
3.3 MWh
184 W
A5
3 MWh
183 W
3 MWh
183 W
533.33 W
Updated 34 s ago.
A1
A2
STATUS
1066.67 W
PHYSICAL LAYOUT
A1
MANUAL / ABOUT
ON
1600 W
04:00
Updated 34 s ago.
VIEW:
SETTINGS
MAIN PAGE
LETRIKA
533.33 W
3.3 MWh
184 W
SETTINGS
MAIN PAGE
LETRIKA
MANUAL / ABOUT
ON
Copyright (©) Letrika, d.d. - All right reserved.
0.2 kWh
2.36 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
0W
00:00
04:00
08:00
12:00
16:00
20:00
00:00
13.1 kWh
0.2 kWh
2.36 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
Copyright (©) Letrika, d.d. - All right reserved.
All the calculationsare onlyinformative.
VIEW:
A2
A3
A4
A5
0.4 MWh
184 W
3.3 MWh
185 W
3.2 MWh
179 W
3.3 MWh
184 W
SETTINGS
LETRIKA
13.1 kWh
0.2 kWh
2.36 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
SETTINGS
MAIN PAGE
LETRIKA
STATUS
1600 W
1000 W
666.67 W
533.33 W
0W
00:00
04:00
08:00
12:00
16:00
20:00
00:00
13.2 kWh
0.3 kWh
2.37 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
A5
3.3 MWh
184 W
333.33 W
0W
00:00
04:00
08:00
12:00
16:00
20:00
00:00
Updated 34 s ago.
DAILY POWER
VIEW:
PHYSICAL LAYOUT
A4
3.2 MWh
179 W
STATUS
Updated 34 s ago.
VIEW:
A3
3.3 MWh
185 W
MANUAL / ABOUT
ON
1066.67 W
A2
0.4 MWh
184 W
Copyright (©) Letrika, d.d. - All right reserved.
All the calculationsare onlyinformative.
MANUAL / ABOUT
ON
DAILY POW
2014-9-18
ALL PANELS
4000 W
A1
A2
A3
A4
A5
3600 W
3200 W
3 MWh
183 W
0.4 MWh
184 W
3.3 MWh
185 W
3.2 MWh
179 W
3.3 MWh
184 W
2800 W
2400 W
2000 W
1600 W
1200 W
800 W
400 W
0W
00:00
Copyright (©) Letrika, d.d. - All right reserved.
02:00
04:00
06:00
08:00
10:00
12:00
14:00
16:00
18:00
20:00
22:00
00:00
All the calculationsare onlyinformative.
Copyright (©) Letrika, d.d. - All right reserved.
0W
00:00
04:00
08:00
12:00
16:00
20:00
00:00
PHYSICAL LAYOUT
A1
3 MWh
183 W
Copyright (©) Letrika, d.d. - All right reserved.
MAIN PAGE
STATUS
533.33 W
Updated 34 s ago.
PHYSICAL LAYOUT
A1
3 MWh
183 W
MANUAL / ABOUT
ON
1600 W
1066.67 W
533.33 W
Updated 34 s ago.
VIEW:
SETTINGS
MAIN PAGE
LETRIKA
STATUS
All the calculationsare onlyinformative.
1600 W
1066.67 W
13.1 kWh
All the calculationsare onlyinformative.
All the calculationsare onlyinformative.
EMBEDDED LINUX OPERATING SYSTEM
10
SETTINGS
MAIN PAGE
LETRIKA
MANUAL / ABOUT
ON
13.3 kWh
0.4 kWh
2.4 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
SETTINGS
MAIN PAGE
LETRIKA
STATUS
1000 W
1600 W
666.67 W
1066.67 W
333.33 W
0W
00:00
04:00
08:00
12:00
16:00
20:00
00:00
MANUAL / ABOUT
ON
13.3 kWh
0.4 kWh
2.39 €
0.01 t
OVERALL ENERGY
DAILY ENERGY
EARNINGS
REDUCED CO2 EMMISIONS
STATUS
533.33 W
0W
00:00
04:00
08:00
12:00
WEEKLY POWER
VIEW:
2015-2-2...2015-2-8
WEEKLY P
ALL PANELS
20:00
00:00
ALARM HISTORY
VIEW:
4000 W
Panel ID
Microinverter ID
Time
Alarm no.
Error
3600 W
A1
0000020B
6. 2. 2015 14:58:46
9
ERR_ADC_OFFSET_ERROR
3200 W
A2
0000020B
6. 2. 2015 14:58:36
9
ERR_ADC_OFFSET_ERROR
A3
00000241
6. 2. 2015 14:58:35
9
ERR_ADC_OFFSET_ERROR
A4
0000020C
6. 2. 2015 14:58:36
9
ERR_ADC_OFFSET_ERROR
2800 W
16:00
Updated 19 s ago.
Updated 52 s ago.
2400 W
2000 W
1600 W
1200 W
800 W
400 W
0W
Feb 02 00:00
Feb 02 12:00
Feb 03 00:00
Feb 03 12:00
Feb 04 00:00
Feb 04 12:00
Feb 05 00:00
Feb 05 12:00
Feb 06 00:00
Feb 06 12:00
Feb 07 00:00
Feb 07 12:00
Feb 08 00:00
Feb 08 12:00
Feb 09 00:00
Copyright (©) Letrika, d.d. - All right reserved.
Copyright (©) Letrika, d.d. - All right reserved.
All the calculationsare onlyinformative.
TECHNICAL CHARACTERISTICS
Communication to microinverters
WMbus 868 MHz, selectable sample rate(min 60s)
Communication to PC, tablet, smartphone
WiFi IEEE 802.11/2.4GHz, Ethernet RJ45
Connectors
1xRJ45 Ethernet, 1xUSB(for additional functions)
Operation system
Embedded Linux, Integrated web server
Data storage
SD card (Max. 32 GB)
Supply voltage
12v DC
IP protection
IP 40
Ambient temperature
-20...+55°C
Weight
350g
Dimensions
150x37x155mm
Optional sending data to cloud by predefined protocol
Basic monitoring and settings through LCD display
POWER SUPPLY
Input
100...240Vac; 50Hz-60Hz
Output
12Vdc, 700mA
IP protection
IP 40
Optional
Extension cable for WMbus antenna
All the calculationsare onlyinformative.
ABOUT US
Headquarters
Letrika Sol d.o.o.
Vrtojbenksa cesta 64
5290 Šempeter pri Gorici, Slovenia
T: +386 5 339 4262
E: info.sol@letrika.com
Letrika Sol d.o.o. is a joint venture between companies Cosylab d.d. and Letrika d.d.
Cosylab d. d., Control System Laboratory
Teslova ulica 30
1000 Ljubljana, Slovenia
T: +386 1 477 66 76
F: +386 1 477 66 10
E: info@cosylab.com
Letrika d.d.
Polje 15
5290 Šempeter pri Gorici, Slovenia
T: +386 5 339 3000
F: +386 5 339 3801
E: info@letrika.com
www.letrikasol.com
February 2015 / 722.704.841