Solar Inverter

UTL Sigma Grid Export Solar PCU 10 Kva 180V Price

UTL Sigma Grid Export Solar PCU 10 Kva 180V Price

Sigma+ PCU is a solar power conditioning unit which is a single phase output, Inverter system. It works as a Bi-directional inverter which means power will be exported into the grid or power will be imported from the Grid.

The Sigma+ PCU work in two operating condition:
1. Stand-alone
2. Grid Interactive

Stand-alone: Inverter operates from battery or array power source and produces AC output. Battery charged by solar (primary) & also from grid (secondary). Since usage of power from grid is secondary, grid power is only used when solar power is absent or below a certain level and battery voltage level reduces upto battery low status. Working Modes: Smart, PCU & Hybrid


Model 10 Kva
Operating DC Voltage 180 V

Solar Panel

Input Voltage range(Min.-Max.) 337-540
Maximum PV power recommended 10

Solar Charge Controller

Switching Element IGBT
Controller DSP
 Type of Charger PWM with MPPT
Efficiency 95%


Battery Low Buzzer 11.2 V
Battery Low cut 11 V
Battery High cut 16 V
Battery Charging Voltage with SPV 14.5 V
Battery Charging Current with SPV 18 V
Battery Charging Voltage with Grid 13 V
Battery Charging Current with Grid 10 V
Grid low cut voltage(it Mode/Normal) 175/120 V
Grid high cut voltage(IT Mode/Normal) 255/280 V
Grid Charging Enable/Disable
IT Load Enable/Disable
Operating mode Smart/PCU/Hybrid/Grid Export
Output voltage low 185 V
Output voltage high 255 V
No load shutdown Enable/Disable

Grid Export Mode Enable

Grid Interactive: Inverter operates from battery or array power source and produces AC output and also operates in parallel with the grid supply. Any excess solar power will be exported into the grid. Whenever sufficient solar power is not available to run the load, the required power is shared from the grid. The maximum power feed into the grid is depends on the system rating. Battery charging automatically occur from the grid to maintain the battery bank at its grid charging voltage. Working Modes: Grid Export Mode

Grid Low/recover 185/195 V
Grid High/recover 280/275 V
Synchronization voltage range 185/280 V
Synchronization frequency range 47 to 53 V
maximum charging current from grid (import) 10 A


The PCU feeds the battery installed to it a constant boost charging current until its voltage reaches 14.2V and the float current (which is very close to zero) then maintains this voltage above 13V. Thus reducing the float current ( flowing for the longest period during the entire process) to zero, ultimately resulting in much enhanced battery life keeping it fully charged simultaneously.

Grid Disconnect (Solar Available) @14.5V/Battery for 2 minutes OR 13.5V/Battery-100% Current (if Grid Chg. Volt. Ref. set to 14.2V)
Grid Reconnect (PCU Mode / Smart Mode), 11.5 V
Import ON (Grid Export mode) 11.5 V
Temp. Compensation @ 3mV/cell; 18mV/Battery


Switching Element IGBT
Control PWM
Nominal Output voltage 220 V
Output supply phase 1Phase, 3 Wire
Output waveform Sine Wave
Nominal frequency 50 Hz
Load power factor 0.8
Voltage regulation 1
Output voltage distortion with 100% linear load <3
Overload capacity IT Load Disable
100-120%(3Times auto reset):60sec;
120- 150%(3Times auto reset : 30sec;
200-300%:1 sec;
300-400%: 250msec;
>400%:20 msec;IT Load Enable
100-110%:10min; 150-200%:2sec; >400%:20 msec;
110-120%: 2min; 200-300%:2sec;
120-150%:30sec; 300-400%:250msec;
Peak efficiency >85 %
Noise @ 1 meter 60 dB
Cooling Temp. Controlled Fan
Protections Overload, Battery Low, Battery High, Output Low, Output High, Output Short Ckt., Input Short Ckt., Overheat, Under Frequency, Over Frequency, Solar Panel Reverse , Anti-islanding
Display Parameters Battery Voltage, Charging Current, Discharging Current, charging KWH and discharging KWH, Solar Voltage, Solar Current, Instantaneous Power, Cummulative Energy , Grid Voltage Grid Current, Frequency, Import Power, Import Energy
Export Power, Export Energy , Output Voltage, Output Current, Frequency, Instantaneous Power & Commutative Energy , Grid, Inverter & SPV Charger Status
Switches Reset for System ON/OFF, UP, DOWN, BACK, ENTER (for LCD Configuration)
Indications System ON, Inv. ON, SPV Charging, Grid Charging, Grid Export ON, Battery Low/High, No Load, Overload, Overheat, Mains Low, Mains High, Under frequency, Over frequency, Operating modes (smart, Hybrid, PCU and Gridexport)


Operating temperature 0-50 ºC
Max. Relative Humidity @ 25 C (non condensing) 95 %
Degree of Protection IP-21
Data Logging 30 Days Data Storage
Dimension (LxWxH) 26 x 13 x 26 Inch
Weight 90


  • Grid Interactive.
  • DSP based design built in rMPPT solar charge controller.
  • USB/Ethernet based monitoring with 30 days data storage.
  • Maximum preference to Solar Power.
  • Priority based working modes:
    Smart Mode – Solar, Battery, Grid (Day time)
    Grid, Battery (Night time).
    PCU Mode – Solar, Battery, Grid.
    Hybrid Mode – Grid, Solar, Battery (Load)
    Solar/Grid (Charging)
    Grid Export Mode – Solar, Grid, Battery
  • User friendly & easily accessible LCD Display with all AC & DC parameter configurable from LCD:
    AC- Input & Output Voltage. DC- Battery charging voltage, Charging current, Low cut & High cut.
  • Compatible with all PV arrays having different no of cells (36 cell/60 cell/72 cell) with 100% panel
    power rating.
  • IEC 61683, 61727, 60529, 60068-2 (1,2,14,30) and 62116 standards approved from MNRE.

Disclaimer: The Price & Specs Shown May Be Different From Actual. Please Confirm Before Purchasing.

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