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The About Us page lets you find out more about Solar 4 RVs.

The Assess Your Needs page will guide you on the steps to take to determine what size system you need and what products you needs.

Morningstar’s TriStar MPPT solar controller with TrakStar Technology™ is an advanced maximum power point tracking (MPPT) battery charger for off-grid photovoltaic (PV) systems up to 3kW.  


  • Maximizes Energy Harvest
  • High Reliability
  • High Efficiency
  • Extensive Networking and Communication Capabilities
  • Metering and Data Logging
  • Certified to IEC 62093

​​There are three models available.


​Remote Temperature Sensor

The RTS is recommended whenever the temperature of the battery varies more than 5°C during the year.   For maximum protection from harsh environments, the sensor is encapsulated in epoxy inside a power lug housing.  The RTS is also protected from lightning surges and short circuits.

The RTS is compatible with:

SunSaver MPPT™
SunSaver Duo™
ProStar™ whenever the temperature at the battery will be more than 5°C (9°F) different than the temperature at the controller.
TriStar™ for battery charging or diversion control modes (not for load control mode).

The TriStar has no on-board temperature compensation; therefore the use of the RTS is required for temperature compensated charging. 

Other Morningstar Products


​Solar Controller Communications Hub (MeterHub) to connect multiple units

The MeterHub (HUB-1) allows up to 15 Morningstar products on a single MeterBus network. The product electrically isolates devices that supply power to the network, preventing damage to the network in the event of grounding problems. Five status LED’s indicate the proper network connection to each port. The MeterHub is suitable for either wall or DIN rail mounting.


​TriStar Digital Meter or Tristar Remote Digital Meter

The TriStar Meter-2™ (TS-M-2) and the TriStar Remote Meter-2™ (TS-RM-2) are advanced LCD digital meters that display system and controller information, logged data, bar graph metering, alarms and faults for easy
troubleshooting. They are nearly identical except that the TS-M-2 is mounted on the controller and the TS-RM-2 is flush mounted up to 30 metres away from the controller.  

In multi-controller systems, they are networkable using Morningstar’s MeterHub to allow individual controller data and aggregate system data to be displayed together on a single meter.

Dimensions: 29.1 x 13.0 x 14.2 cm

Weight: 4.2 kg

Warranty: 5 years

Remote Temperature Sensor is included.

Manufacturer:  Morningstar (USA)

The TriStar has no on-board temperature compensation; therefore the use of the Remote Temperature Sensor (listed below) is required for temperature compensated charging.

The US based Morningstar Corporation has been supplying high quality PV solar charge controllers and inverters for over 21 years with over 2.5 million units installed in over 112 countries. 

Their products have protection against extreme environments, corrosion, lightning surges and harsh ambient operating temperatures.  Their MPPT solar charge controllers deliver extended battery capacity and life, lower overall system costs and maximum energy harvest. 

Morningstar TriStar

MPPT Solar Charge Controllers / Regulators 


For more information about our Kits go to Our Kits page
The Contacts Us page provides email and phone details if you have further questions.
Undertake our Solar Power Estimate Calculator (SPEC) questionnaire to determine what your RV power needs are.
The FAQ page has extensive, detailed information about solar power, solar power systems and its components.
The Our Products page has an overview of our products.

​PC MeterBus adapter

Morningstar’s PC Meterbus Adapter (MSC) converts a controller’s meter port (RJ-11 phone type connector) to a standard RS-232 serial connector for connection to a PC or other equipment. The MSC may be used with any Morningstar controller or inverter equipped with a meter connection that does not also already have a RS-232 port.

To purchase go ​to our Prices & Purchase page.

​Remote meter

Morningstar’s Remote Meter (RM-1) is a universal, four digit display with custom icons that is compatible with the SunSaver Duo and SunSaver Duo MPPT controllers and the SureSine inverter. This meter provides comprehensive system information for easy monitoring including voltage, current and temperature.


​Relay Driver Logic Module Accessory for solar Controllers 

Morningstar's Relay Driver is a logic module which provides high level system control functions such as high/low voltage alarms, load control and generator start.  The product controls four independent relay driver outputs by reading digital data inputs from the TriStar controller or by reading battery voltage when used in systems with other controllers.

Data Control Input Options:

  • when connected to a TriStar Controller:   Battery voltage, charge/load current, battery temperature, TriStar heatsink temperature, PWM duty cycle, PV/load voltage, and all TriStar alarms or faults.

  • when used in systems with other controllers:   Battery voltage, Relay Driver temperature, input voltages from other sources

Morningstar Accessories

To purchase any of these products go ​to our Prices & Purchase page.