CoolMax SRX




AERL’s SRX is the latest release in the CoolMax MAXIMIZER™ range. More powerful, robust and efficient than previous generations, the SRX MPPT Solar Charge Controllers feature peak power efficiencies over 99%.

The CoolMax SRX's revolutionary ultra-low heat, high-efficiency thermal design makes the SRX a highly robust and reliable MPPT Solar Charge Controller that is at home in any high-quality DC Coupled installation.


AERL has been designing and manufacturing highly reliable and efficient specialized MPPT Solar Pump and Solar Charge Controllers since 1985. AERL’s MAXIMIZER™ MPPT Solar Regulator was, in fact, the world’s first truly Universal Maximum Power Point Tracker ever to be developed and manufactured commercially.

AERL has now supplied thousands of MAXIMIZER™ MPPT controllers, totaling millions of field operating hours, and supplying reliable power to many satisfied customers worldwide.


More information is available here on AERL's website. Contact us for pricing and availability.




 Datasheet | Installation Manual | Warranty Conditions


Why use an AERL COOLMAX SRX MAXIMIZER™ MPPT Solar Charge Controller?


  • Australian Designed and Made - Local Service and Support.

  • Established Reputation AERL MPPT Solar Charge Controllers already possess a long-established reputation for being highly reliable and efficient.

  • World Record Efficiencies - The CoolMax SRX’s ultra-low loss, high-efficiency design with peak power efficiencies of over 99%.

  • Up to 35% More Power - Harvest up to 35% more power from solar panels with a high-efficiency MPPT solar charge controller.

  • Remote Monitoring Capabilities - Suitable for remote monitoring via CAN bus or Modbus interface options.

  • LCD Touch Screen Programming - For easy set-up and system configuration. 

  • Smart multi-stage Battery Charging Profile

  • Active Temperature Compensation - Onboard support for active temperature compensation.

  • Fully Adjustable Charge Profile - For custom-sized battery packs (Charge voltages selectable in 0.1 V increments).

  • Compatible with all types of batteries and solar arrays

  • Suitable for all Climates - Rated for temperature extremes ranging from -20 to 50°C (ambient).

  • Robust and Reliable - Mil-spec conformal coating on both sides of the printed circuit board, sealed potentiometer, gold plated switch ensures long term reliability especially in harsh tropical and marine environments. 

  • Easy Installation & Set-up

  • Easy servicing - Custom made, compact, lightweight and easily replaceable plug-in control module provides for exceptionally simple servicing should a fault develop.

  • Five Year WarrantyAERL’s COOLMAX MPPT solar charge controller range comes with a full comprehensive five-year warranty.