Solar Management Unit (SMU) can convert your simple Inverter into Solar Inverter. SMU ensures priority usage of Solar Power to reduce Grid consumption.

The SMU could charge battery automatically from photovoltaic (PV) systems. The charging process has been optimized for long battery life and improved system performance. The comprehensive self-diagnostics and extensive electronic protection can prevent damage against incorrect wiring or system faults. The system can work as a domestic inverter and a solar inverter automatically or manually through a switch except in night condition. In night condition the system will work as normal domestic inverter.

Key Features:

  High speed and high performance micro-controller
  High reliability with longer operational life
  Prioritize Solar Power over Grid Power
  Increase the battery lifetime
  Automatic/ Manual operation through a switch
  Inbuilt protection to avoid battery undercharge and over-charge.
  Very Low Consumption in Idle State
  Electronic protection

High speed and high performance micro-controller

High speed microcontroller increases the performance of the system. UTL’s Solar Management Unit (SMU) is embed with a high speed microcontroller which provide ability to perform its task more reliably and efficiently.

High reliability with longer operational life

UTL’s Solar Management Unit (SMU) is highly reliable and it has longer operational life. It can be operated in extreme environment conditions. It can be operated at temperature range that lies in 0°C to 60°C.

Prioritize Solar Power over Grid Power

SMU ensures priority usage of Solar Power over Grid Power to reduce Grid consumption. In Daytime condition, the system will give priority to Solar Power and use Grid Power only when the Solar Power is insufficient to sustain the load requirement. When battery gets fully charged during daytime, the SMU will automatically cut-off the Grid Power from the system and load will run through the home inverter.

Increase the battery lifetime

SMU utilizes four stage battery charging algorithm that enhances the battery life. In Bulk stage SMU feeds the battery installed to it a constant boost charging current until its voltage reaches 14.4V and the float current (which is very close to zero), then in absorption stage it maintains this voltage above 14.2V for 3 hrs. 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.

Automatic/ Manual operation through a switch

The system can work as a domestic inverter and a solar inverter automatically or manually through a switch except in night condition. In night condition, first it will harvests the stored battery energy then it will work as normal domestic inverter.

Inbuilt protection to avoid battery undercharge and over-charge

UTL’s SMU has the capability to charge a battery which goes in deep discharge condition. It can charge the battery if the battery voltage during discharge reaches up to 8V per battery. It uses four stages to charge the battery i.e. Boost, Absorption, Float and Equalization. This feature protects the battery for being over charged.

Very Low Consumption in Idle State

UTL’s SMU have very low idle consumption. In idle state it consumes less than 20mA current which makes it more efficient than any other SMU.

Electronic Protection:

  Over charging-voltage
  Over charging-current
  Under voltage
  Battery reverse polarity protection
  Solar reverse polarity protection
  Reverse current flow at night from battery to solar array
  Over temperature

Specifications:

Application                                                                     Convert Simple Inverter into Solar Inverter

Model                                                                             12V/20A, 24V/20A

Operating temperature                                                0°C to 60°C

Storage temperature                                                   -20°C to 60°C

Battery Type                                                                  Lead Acid/ Flooded Battery 12V/24V

Battery (Ah)                                                                   100Ah – 180Ah

Battery charging regulation method                         4 Stage PWM
(Bulk/Absorption/Float/Equalize)

Solar Module size                                                       12V, 20 Amps: up to 300 W

(Max)                                                                              24V, 20 Amps: up to 500 W

 

Electrical

Nominal system Voltage                                             12/24V DC

Charging current (Solar)                                              20A

Idle consumption                                                          <20mA

Operating Solar input Voltage (Voc)                         21V/ 42V

Max. Solar input Voltage (Voc) + 2V                         25V/ 45V

Min. Solar input Voltage(Voc) @ start-up                15V/30V

Solar panel recovery Voltage                                    17V/34V

Max. Solar Current                                                       20A

Battery Voltage Range                                                6V-17V/ 17V-30V

Efficiency                                                                       > 95%

 

Protections

  1. Battery Reverse Polarity                                       5. SPV Reverse Polarity
  2. Against module reverse current flow                  6. Load Short Circuit
  3. Over Current                                                            7. Under Voltage
  4. Over Voltage                                                           8. Over Temperature

 

Physical

Dimensions (W x H x D) in mm                                 209 x 123 x 101

Weight                                                                           1.2 kg

Fixing                                                         Wall Mounted