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UTL r-MPPT Solar Management Unit 12V/24V 40A

Key Features

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.erational 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


SMU CapacitySMU1224/40
Operating Temperature0°C to 50°C
Storage Temperature-20° C to 60°C
Battery TypeTubular/SMF, Battery 12V/24V
Battery Capacity AH100AH – 180AH
Battery charging regulation methodBulk, Absorption, Float, Equalise
Nominal System Voltage12/24 DC
Charging Current (Solar)20A-40A
Charge Controller Efficiency>95%
Idle Consumption<20mA
Operating Solar Input Voltage (VOC)22.5V/45V
Max. Solar Input Voltage (VOC)25A/45V
Min Solar Input Voltage (VOC)15V/30V ± 2%
Solar Panel Recovery Voltage17V/31V ± 2%
Max. Solar Current40A
Battery Set Point @25 °C
Absorption voltage Tubular Battery14.2V/28.4V±2%
Absorption voltage SMF Battery13.7V/27.4V±2%
Absorption Duration3hr
Float Voltage Tubular Battery14V/28±2%
Float Voltage SMF Battery13.7V/27.0V±2%
Bulk Voltage Tubular Battery14.6V/29.2V±2%
Equalise Voltage14.9/29.8V±2%
Equalise Duration3hr
Equalise Calendar28days
Mains reconnect when Solar not PresentAt any Battery Voltage
Mains reconnect when insufficient solar power≤ 11.8V/23.6V ± 2%
Mains disconnect when sufficient solar power for Tubular≥ 13.8V/27.6V ± 2%
Mains disconnect when sufficient solar power for SMF13.7V/27.4V ± 2%
FixingWall Mounted
Ingress ProtectionIP-20
Dimension228X152X76 mm
BRAND:UTL (Fujiyama Power Systems Pvt Ltd)
SALES ENQUIRE CONTACT          : 8762607476
SERVICE CENTRE NAME                                : SL ELECTRONICS
SERVICE CENTRE CONTACT NUMBER     : 0824 4114138, 7795214858
Toll Free No  (All India Service)                                                        8510 885 885 

MRP : Rs 8720.00

Discounted Price : Rs 7848.00