About The Morningstar Solar Regulator


Morningstar Corporation is a world-leading supplier of solar charge controllers & inverters—with over 2 million units installed, in over 112 countries around the world. Morningstar Solar Regulators have been recognized in international solar markets as the most advanced and highest-quality products available.


Why Choose MorningStar

  • The best overall value – Combination of performance, features and competitive  price results in the best solar  controller value on the market
  • Extremely high reliability – failure rates of less than 1 in 1000 units shipped
  • Outstanding battery charging – PWM charging can double the life of the battery and recover capacity in a sulfated battery. Series design, not shunt, reduces heating and stress on the electronic components
  • Highest quality – manufactured in a fully automated, world class ISO9001 factory. Quality control using the latest computerised test equipment.
  • Electronic protections – fully protected against reverse polarity, short circuit, overcurrent, high temperatures, and reverse current at night. No mechanical fuses.
  • Environmental protections – rated for ambient temperatures of -40°C to +60°C. Epoxy encapsulated or conformal coating to protect printed circuit boards from corrosion.
  • No need to derate – Designed with a 25% safety margin, the controllers may be used up to their “name plate” rating.
  • Expected 15 year life – 5-year warranty, with an expected operating life of 15 years or more.
  • Easy to use – Large clearly marked wire terminals, LED and meter displays, well-written manuals and timely technical support.
  • Efficiently uses the solar energy to fully recharge the battery
  • Prevents overcharging and excessive gassing of the battery
  • Prevents undercharging and sulphation of the battery
  • Provides load management
  • Provides status information and the controller and the system


The SunSaver is the world’s leading small solar controller for industrial and leisure markets.

SunSaver Duo

The SunSaver Duo is a two battery solar controller with optional remote meter for caravans and boats.


The Sunkeeper solar controller mounts directly to the solar module junction box and eliminates the need for an additional controller housing

Extended battery life

PWM series battery charging with temperatue compensation. Sealed/flooded battery select.


Epoxy encapsulation, marine rated terminals and anodised aluminium case provides environmental protection.

Download Datasheet

SunKeeperTwo battery charging

Solar charge current is shared between two batteries based on a user selectable priority. When one battery is fully charged, all of the charge current flows to the other battery.

Highly reliable

Epoxy encapsulation protects the controller against dust and high humidity. Extensive electronic protections, including short circuit,over current and reverse polarity, ensure that the controller will not be damaged by wiring mistakes or overloads.

User adjustable

Controler paramters may be adjusted ising the DIP switch on the controller. Further customisation is enabled by connecting to a personal computer and using Morningstars PC software.

Download Datasheet

High temperature rating

Rated to 70°C to operate in high temperatues at the solar module. No need to de-rate

Outdoor rated

approved for outdoor use without an additional enclosure. IP65, UV resistant case.Epoxy encapsulated and watertight connection to the module junction box

Download Datasheet

SunLight Solar Controller

The SunLight is the world’s leading solar controller for street and pathway lighting, parking areas, bus stations and signage.

SunGuard Solar Controller

The SunGuard is a one module solar controller for professional and lesiure markets.

Tristar PWM Controller

The TriStar is a three function controller that provides reliable battery charging, load control or diversion regulation.

Provides 10 lighting options

user adjustable for 2 to 10 hours on or for on all ngiht. Unique ON/OFF/ON settings conserve energy and turns light on furing the day and LED indicates selected lighting option.

East to install

To confirm the correct installation, test button turns light on during the day and LED indicates selected lighting option.

Rugged industrial design

Epoxy encapsulation electronics marine rated terminals and anodised aluminium case.

Download Datasheet

Highly reliable

100% solid state design and epoxy encapsulated for environmental protection. Rated for 25% overloads and no need to de rate.

Extended battery life

series design, not shunt, PWM battery charging with temperatue comensation. Low self-consumption.

Easy to install

Outdoor rated connecting wires for waterproof connection to solar module and battery.

Download Datasheet

Highest reliability

Large heat sink and conservative design enables operating at full ratings to 45°C

More information

Optional ,eter displays extensive system and controller information, automatic self-test and reset. Displays in 5 languages

Communication capability

RS-232 connects to a personal computer for custom settings, data logging and remote monitoring and control.

Fully adjustable

DIP switch provides user with choice of 7 digital presets. Additional custom settings via RS-232.

Extensive electronic protections

Fully protected against reverse polarity , short circuit, overcurrent, high temperature and overvoltage.

Download Datasheet

TriStar MPPT Controller

The TriStar MPPT TrakStar Technology is an advanced maximum power point tracking controller for off-grid solar systems up to 3kWp.

Morningstar SunSaver MPPT

This range of MPPT  solar controllers enables the use of high voltage and thin film modules for off-grid battery charging for both 12V and 24V applications. These solar controllers allow the user to take advantage of the lower prices of the higher wattage panels, typically used in the on-grid market, to make larger arrays of up to 400W

Maximises energy harvest

Better peak power tracking than other MPPT controllers.

Very high efficiency

the industry’s highest peak efficiency of 99% for off-grid charge controllers

Extensive networking & Communications

Enables system monitoring, data logging and adjustability. On board ethernet included on the TS-MPPT-60.v

Download Datasheet

Power boost

Maximum power point trakcing provides an increase of amps from the solar array into the battery.

Use of high voltage module

In addition to 12 volt crystalline modules, enables the use of high voltage and thin film modules for off-gird battery charging.

Trakkstar MPPT

harvests the power from the peak power point of the solar array, converts the power down to battery voltage, and boosts charging current in the process.

Download Datasheet

Overview of Maximum Power Ratings

Regulator Model Maximum Solar Panel Rating (12V) Maximum Solar Rating (24V)
SunGuard 4.5A 54W, 4.5A
SunSaver SS-10 L 120W, 10A
SunSaver SS-10 L 24 240W, 10A
SunSaver SS-20 L 240W, 20A
SunSaver Sunlight SL-10 120W, 10A
SunSaver Duo SSD-24 300W, 25A
Remote Meter N/A
SunSaver MPPT 200W, 15A 400W, 15A
TriStar MPPT 600W, 45A 1200W, 45A
TriStar MPPT 800W, 60A 1600W, 60A

What accessories would you buy with your regulator?

SunSaver X       X X
SunSaver Duo X     X X X
SunSaver MPPT X     X X  
TriStar PWM X X X X  
TriStar MPPT X X X X  

Tristar Digital Display

  • 2 x 16 character display
  • Mounts to the controller
  • Provides system and controller information, data logging and bar graphs
  • Choice of 5 languages

Tristar Remote Meter

  • 2 x 16 character display
  • Mounts to the controller
  • Provides system and controller information, data logging and bar graphs
  • Choice of 5 languages
  • 30m of cable for mounting away from the controller

Morningstar Remote Meter

  • 4 digit display with custom icons
  • Displays systems information, logged data, alarm and errors
  • May be mounted in the wall or on the wall including frame
  • Includes 10m of cable

Relay Driver (RD-1)

  • 4 independent relay driver outputs (relays not included)
  • Used for high/low voltage alarms, load control, generator start
  • Reads digital data inputs for TriStar or TriStar MPPT

Remote Temperature Sensor (RTS)

  • Improves battery charging by using temperature at the battery for very accurate temperature compensation
  • Recommended for solar systems that experience temperature variations during the year or whenever the temperature at the battery will be more than 5°C different than the temperature at the controller.

 PC Meterbus Adapter

  • Used to connect a Morningstar solar controller to a PC or other third party serial enabled devices
  • Comm link enables monitoring and logging of data as well as customising of set points

To speak to a sales engineer to help you select the right solar controller call +44 (0) 1536 201588 now


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