PWM Controller Steca PR2020 12/24V with Display
Modelo: PR2020- Sku: STECREG007
- Vendor: Steca
Specifications
Product Description
The Steca PR2020 12/24V PWM Controller with Display is designed for off-grid solar installations that require higher charging current without losing visual control and precision over the battery status. It belongs to the renowned Steca PR 10–30 series and combines a shunt topology with MOSFETs and a multi-stage PWM charging algorithm (bulk, boost, float, and monthly equalization) that minimizes sulfation and extends the service life of 12 or 24 V batteries. The Steca AtonIC system calculates the SOC (State of Charge) with great accuracy and displays it on a graphical LCD display along with voltage, current, and accumulated energy. Its internal energy logger (resettable data logger), self-diagnosis with fault messages, and automatic load disconnection/reconnection facilitate daily operation and incident resolution.
Main Features
- Nominal working current: 20 A for 12/24 V with automatic detection.
- Multi-stage PWM with temperature compensation and monthly equalization for preventive maintenance.
- Graphical LCD display with Steca AtonIC SOC, digital measurement of V/A/Wh, and button-operated menus.
- Integrated data logger, self-check, and alarm messages on screen.
- Comprehensive electronic protections and automatic fuse; intelligent load reconnection.
- Robust IP31 construction, very low self-consumption, and easy installation with generous terminals.
Advantages or Benefits
- Higher capacity (20 A) for PV arrays and higher loads without increasing system complexity.
- Battery care thanks to precise charging voltages and controlled equalization that reduces aging.
- Instant visualization of system status: actual SOC, energy produced, and clear alarms on the LCD.
- Reliability and safety with low voltage disconnection, protected reverse polarity, and blocked night return.
- Simple operation with automatic 12/24 V detection, intuitive buttons, and minimal maintenance.
Purpose or Applications
Ideal for small/medium off-grid homes, outdoor lighting, cabins, telecommunications, surveillance cameras, caravans, and boats. Its display and energy logging make it the preferred option when visual control and reliable data are required without additional equipment.
Technical Specifications
| System voltage | 12/24 V (automatic detection) |
| Charging current / load current | 20 A / 20 A |
| Technology | PWM in shunt topology (MOSFETs); bulk/boost/float and monthly equalization |
| Permissible PV Voc | < 47 V |
| End of charge / Boost / Equalization | 13.9 V / 14.4 V / 14.7 V (×2 at 24 V) |
| LVD / LVR (approx.) | ≈11.1 V / ≈12.6 V (×2 at 24 V) by SOC |
| Self-consumption | ≈12.5 mA |
| Display | Graphical LCD with Steca AtonIC SOC and navigation keys |
| Protections | Overload, deep discharge, reverse polarity, short circuit, over/under voltage, overtemperature, night return |
| Ambient temperature | −10 °C…+50 °C |
| Protection rating | IP31 |
| Connections | Terminals up to 16 mm² (stranded) / 25 mm² (solid) |
| Dimensions / weight | 187 × 96 × 44 mm / ≈ 350 g |
| Certifications | CE, RoHS; EU manufacturing under ISO 9001/14001 |
Compatibilities
Accessories: Steca PA TS10 external temperature sensor and optional alarm contact. Important: do not connect inverters to the “Load” output; they must be powered from the battery with appropriate protections.
Steca PR2020 12/24V PWM Controller with Display offers power, safety, and top-level visual control to maximize the performance of your off-grid photovoltaic installation.
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PWM Controller Steca PR2020 12/24V with Display
