Description
Morningstar TriStar™ TS-45 45 Amp 12/24/48 V Three-Function Programmable PWM Charge Controller
Overview
The TriStar TS-45 is a versatile, three-function PWM charge controller designed for professional off-grid and hybrid solar systems. Rated at 45 A and supporting 12 V, 24 V, or 48 V DC battery banks, it can be configured for charging, load control, or diversion regulation. Morningstar’s robust, fan-less thermal design and industrial-grade build ensure long-term reliability in mission-critical environments such as telecom, SCADA, and remote industrial sites.
Easy DIP-switch configuration, RS-232 connectivity, and support for optional digital meters and remote sensors make the TS-45 a favorite among solar professionals. It is CE- and ETL-certified for UL 1741 and built for continuous service in harsh climates.
Key Features
- Three operating modes: charge, load, or diversion regulation
- Automatic battery voltage detection for 12 V / 24 V / 48 V systems
- Convection-cooled, fan-less design with full-power operation up to 60 °C ambient
- Advanced electronic protections: reverse polarity, short circuit, over-temperature, lightning surge (4500 W TVS)
- Adjustable set-points and custom charging profiles via RS-232 interface
- LED indicators for status, faults, and operating mode
- Compatible with optional TriStar Digital Meter ( TS-M-2 ) and remote temperature sensor ( RTS )
Applications
- Off-grid residential and light-commercial PV systems
- Telecom, signaling, and instrumentation power systems
- Hybrid renewable power systems with load or diversion control
- Industrial and remote site battery management
Technical Specifications
| Model | TS-45 |
|---|---|
| Rated Current | 45 A |
| Nominal System Voltage | 12 / 24 / 48 V DC (auto-detect) |
| Max PV Open-Circuit Voltage | 125 V DC |
| Self-Consumption | < 20 mA |
| Operating Temperature | −40 °C to +60 °C |
| Storage Temperature | −55 °C to +85 °C |
| Voltage Accuracy | ± 0.1 % ( ± 50 mV @ 12/24 V ; ± 100 mV @ 48 V ) |
| Charging Algorithm | 4-stage (Bulk, Absorption, Float, Equalize) |
| Communication Port | RS-232 for data logging and custom settings |
| Mechanical (H × W × D) | 26 cm × 12.7 cm × 7.1 cm ( 10.3 × 5.0 × 2.8 in ) |
| Weight | 1.6 kg ( 3.5 lb ) |
| Certifications | CE, ETL (UL 1741), cETL (CSA C22.2 No. 107.1), IEC 62109-1, RoHS compliant |
Design & Reliability
The TriStar TS-45’s passive cooling system eliminates moving parts and minimizes maintenance. Its precision voltage regulation and lightning surge protection enhance reliability across long service lifetimes. The controller’s large terminals, knockouts, and accessible layout make installation fast and secure for professional integrators.
Monitoring & Connectivity
Integrated LED indicators provide instant status feedback, while optional digital meters and PC connectivity expand data visibility. Multiple units can be networked in parallel systems using Morningstar’s MeterBus accessories for coordinated operation.
