SIGMA 2.0 MPPT Controller 45A, 150VDC, LCD Display
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The Sigma 2.0 MPPT controller with Maximum Power Point Tracking (MPPT) technology is used in off-grid solar system.  Adopting advanced tracking algorithm, it can get the maximum power point of solar module to improve the efficiency of whole system.  The controller optimize the controlling within battery charging to extend battery life. Self diagnostics and electronic protection can avoid mistakes within installation.

Sigma 2.0 MPPT charge controller is different than the traditional charge controllers in that they are more efficient and in many cases more feature rich.  Sigma MPPT charge controller allow your solar panels to operate at their optimum power output voltage, improving their performance by as much as 30%.  Traditional charge controllers reduce the efficiency of one part of your system in order to make it work with another.


How Do Sigma 2.0 MPPT Controllers Increase Charge Current?

Sigma 2.0 MPPT controller increase charge current by operating the PV module in a manner that allows the module to produce all the power it is capable of a conventional charge controller simply connects the module to the battery when the battery is discharged.  When the 75W module in this example is connected directly to a battery charging at 12 volts its power production is artificially limited to about 53 watts.  This wastes a whopping 22 watts or nearly 30% of the available power!

Patented MPPT technology used in Sigma MPPT controller operates in a very different fashion. The Sigma MPPT controller continually calculates the module’s maximum power voltage, in this case 17 volts. It then operates the module at its maximum power voltage to extract maximum power.  The higher power extracted from the module is then provided to the battery in the form of increased charge current.  In conditions where extra PV power is not available, Sigma MPPT controller will operate as a conventional controller with very low voltage drop.

MPPT Graph

The actual charge current increase you will see varies primarily with module temperature and battery voltage.  In comfortable temperatures, current increase typically varies between 10 to 25%, with 30% or more easily achieved with a discharged battery and cooler temperatures.  What you can be sure of is that Sigma MPPT charge controller will deliver the highest charge current possible for a given set of operating conditions.


Key Features and Benefits

  • Can be used in all kinds of bad environment with Aluminum frame.
  • Double crest or multi crest tracing technique design, when the solar panel is under shadow or part of the solar panel is damaged, multi crest will turn up in I-V curve, and the controller can still trace the Max. Power Point.
  • Built-in maximum power point tracking algorithm which could promote energy utilization efficiency of pv system. The charging efficiency is 15%~20% higher than PWM mode.
  • Adopting sorts of tracking algorithm to track the best working point of I-V curve promptly and accurately, the MPPT efficiency could reach to 99.9%
  • The use of advanced digital power technology, circuit energy conversion efficiency is as high as 98%
  • Four stage charging order mode: MPPT-equalizing charging-boost charging-float charging.
  • With current-limiting charging mode, when the power of solar panel is over-sized and charging current exceeds the rated current, the controller will lower the charging power, which enables the system to work under the rated charging current.
  • It can communicate with PC by communication wires and cables, read or set controller’s running parameters and monitor the system operation status.
  • The controller can realize networking operation by the link with telecommunication cable.
  • Have the fault code indication; it helps users confirm the system fault
  • 12V/24V/36V/48V auto identified.
  • Support data storage, the storage span can reach 5 years.
  • It can connect with LCD screen monitoring and the controller parameters are amendable.
  • Built-in temperature sensor, when the temperature exceeds the set value, the charging current will lower down followed by the decrease of temperature, so as to control the controller’s temperature rise.
  • With temperature compensation function to adjust the charge and discharge parameters automatically, which can improve battery service life.
  • Various system protection functions. Including over-charge, over-discharge, over-load, over-heat, the battery reverses connection protection and so on.
  • TVS lighting protection

Download: User Manual (Please click to download)



  • Item #: SIGMA45A

SIGMA 2.0 MPPT Controller 45A, 150VDC, LCD Display

Price: RM2,580.00
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