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Low power Solar Charge Regulator

The Tortech Solar charger controller is a 40/60 amp 12/24 voltage Maximum Power Point Tracking (MPPT) photovoltaic (PV) battery charge controller. Through the use of MPPT technology, Solar charger controller can increase charge current up to 30% or more compared to conventional controllers. Solar charger controller’s sophisticated three stage charge control system can be configured to optimize charge parameters to precise battery requirements.

The unit is fully protected against voltage transients, over temperature, over current, reverse battery and reverse PV connections. An automatic current limit feature allows use of the full 40 amp capability without worrying about overload from excessive current, voltage or amp-hour based load control. Series pass Pulse Width Modulation (PWM) charge voltage control combined with a multistage charge control algorithm leads to superior charging and enhanced battery performance.

The filtered PWM power control system uses highly efficient and reliable power MOSFET transistors. The MOSFET’s are turned on and off at high frequency to precisely control charge voltage and MPPT. Fully automatic temperature compensation of charge voltage is available to further improve charge control and battery performance.

The optional battery temperature sensor is built for long term reliability. The sensor element is environmentally sealed and encapsulated into a plastic lug which adheres to directly to the battery terminal and by RJ11 port connect with the unit, And the Solar charger controller also includes an isolated RS232 port for connection to a PC computer for data logging and system monitoring. The Solar charger controller can easily install in parallel connection of output, so it also suitable for large system current application condition.

Features of the Tortech MPPT Solar Charge Controller:

  • tick.gif High converting efficiency (greater than 97%)

  • tick.gif Built-in MPPT tracker is equipped in the controller to optimize and extract maximum power from the solar panels

  • tick.gif Reversed current protection for enhanced safety

  • tick.gif Automatic battery temperature compensation monitors battery temperature and adjusts charging voltage to ensure optimum charge and increases battery longevity.

  • tick.gif Suitable for various types of batteries and charging modes

  • tick.gif Capable of connecting additional DC load for wider application range

  • tick.gif 3 stage charge control system (bulk, absorption and float mode) with temperature compensation.

  • tick.gif LED indicators display charge status in real time.

  • tick.gif Pulse Width Modulation (PWM) technology combined with a multi-stage charge control algorithm and MPPT technology ensures superior charging and enhanced battery performance

  • tick.gif Click here here for manual 


Model TTMPPT  


  • Further features:

  •  A DC Load output port

  •  An optional battery temperature sensor ensures precise battery charging

  •  LED displays to indicate the status of charge

  •  Lightning protection

  •  Reverse current at night

  •  Three-stage battery charging (bulk, absorption, and float) with optional temperature compensation

  •  Automatic overload protection

  •  Microprocessor controlled

  •  Silent, pulse width modulated (PWM), high efficiency operation



Rated  voltage 12/24 VDC
Rated charge current 40A
Load current 15A
Input voltage range 15-55 VDC
Max. PV open circuit array voltage 55VDC
Typical idle consumption At idle <10 mA
Overload protection (DC load) 2.0 *Inom>5s

1.5*Inom >20s

1.25*Inom temperature controlled

Bulk charge 14.6VDC (default) / 29.2VDC (default)
Floating charge 13.4VDC (default) / 26.8VDC (default)
Equalization charge 14.0VDC (default) / 28.0 VDC (default)
Over charge disconnection 14.8VDC / 29.6VDC
Over charge recovery 13.6VDC / 27.2 VDC
Over discharge disconnection 10.8VDC / 21.6VDC
Over discharge reconnection 12.3VDC/24.6VDC
Temperature compensation (-13.2 MV/°C )/ (-26.4 /°C)
Lead acid battery settings Adjustable
Ni Cad battery settings Adjustable


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  1. Solar Power Charge MPPT  regulator 24v/48v
  2. Solar Power Charge MPPT  regulator 12V

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