About The Spectra Regulators


Spectra is Marlec’s range of solar charge controllers for PV systems up to to 30A, (375W @ 12V and 750W @ 24V). These intelligent regulators use Pulse Width Modulation to deliver bulk, absorption, float and equalised charging regimes ensuring batteries get fully charged and are maintained in good condition.


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All models include an easy to view LCD display with simple to operate push buttons for scrolling and settings where needed. The 10A and 20A models include 2 USB charge points, 5V 1A rated, making these Spectra models excellent value for the user. Standard features include:

  • User adjustable voltage setting
  • Automatic system voltage setting
  • Low voltage disconnect feature
  • Temperature compensation
  • Over current and reverse discharge protection
  • Push button operation
  • Dusk to dawn switching feature


Spectra PV Regulator Maximum
Solar Panel
Rating (12V)
Solar Panel
Rating (24V)
 Spectra PV Regulator 10A  125W  250W  160 x 88 x 42.5
  Spectra PV Regulator 20A  250W  500W  178 x 101.5 x 45.5
  Spectra PV Regulator 30A  375W  750W  196 x 111 x 54

Simple to Connect Spectra Regulators

The large terminals accept cables up to 10mm2 (16mm² for the 30A model).

Auto Detection Voltage Setting

Connect the battery first for the regulator to auto-detect your intended operating voltage to 12V or 24V.

USB Connection Points: 10A & 20A Models Only

Display Screens

The built in display keeps the system user informed about the current operating mode and condition of the battery. It is also used to programme voltage settings and set up of the lighting function. A few examples are:

Indicates the battery voltage levels and the night light function is on

Indicates that solar energy is charging in the Absorption phase. No load is connected.

Indicates that the battery is fully charged and receiving solar energy to float charge to maintain it. No load is connected.

Indicates that the battery is in a critically low state of charge and the Low Voltage Disconnect has shut down the load. No solar energy is being generated at this time.


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