Description
The Victron Energy BlueSolar PWM LCD&USB 48-20 is a 48V solar charge controller featuring a built-in liquid crystal display, dual USB outputs, and programmable battery charge algorithms for reliable and straightforward off-grid solar system management.
Key Features:
- Built-In LCD Display — Onboard liquid crystal display provides real-time status monitoring and full controller setup without additional devices or software.
- Dual 5V USB Outputs — Two built-in USB charging ports deliver up to 2A combined current for convenient device charging directly from the solar system.
- Programmable Battery Charge Algorithm — Pre-programmed charging profiles for AGM, GEL, Flooded, and LiFePO4 batteries ensure optimized charging for all common battery types.
- Day/Night Load Timing — Built-in day/night detection allows a pre-set load ON-time after dusk for automated lighting and load control applications.
- Advanced Overload Protection — Automatically shuts down after 60 seconds at 130% load or after 5 seconds at 160% load, with immediate shutdown on short circuit detection.
The BlueSolar PWM 48-20 supports 48V battery systems with a 100V maximum solar input voltage, delivering 20A of rated charge current for mid-size 48V off-grid installations. Its load output with low voltage disconnect, manual control, and timer function provides complete load management in a single compact unit.
The controller automatically switches to a lower float voltage level two hours after absorption voltage is reached, protecting batteries from overcharge during extended sunny periods. A new charge cycle is triggered whenever battery voltage drops below 13V, ensuring the battery remains fully maintained.
Built with battery reverse polarity protection, output short circuit protection, and over-temperature protection, this unit is designed for reliable long-term field use. Its IP20-rated enclosure operates across a wide -35°C to +60°C temperature range and meets EN60335-1 and IEC 62109-1 safety standards.
Technical Specifications
| Specification | Details |
|---|---|
| Model | BlueSolar PWM LCD&USB 48-20 |
| Battery Voltage | 48V |
| Rated Charge Current | 20A |
| Maximum Solar Voltage | 100V |
| Self-Consumption | < 10 mA |
| Automatic Load Disconnect | Yes |
| Load Output | Manual control + low voltage disconnect + timer |
| Charge Voltage – Absorption | 57.6V (factory setting) |
| Charge Voltage – Float | 54.8V (factory setting) |
| Low Voltage Load Disconnect | 44.8V (factory setting) |
| Low Voltage Load Reconnect | 50.4V (factory setting) |
| USB Output Voltage | 5V |
| USB Output Current | 2A (combined from 2 outputs) |
| Overload Protection | 130% load: 60 sec shutdown / 160% load: 5 sec shutdown |
| Short Circuit Protection | Immediate shutdown |
| Grounding | Common positive |
| Protection | Battery reverse polarity (fuse), output short circuit, over-temperature |
| Operating Temperature | -35°C to +60°C (full load) |
| Humidity | Max 95% non-condensing |
| Protection Class | IP20 |
| Terminal Size | 16 mm² / AWG6 |
| Weight | 0.3 kg (0.66 lbs) |
| Dimensions (H x W x D) | 101 x 184 x 47 mm / 4.0 x 7.4 x 1.8 in |
| Safety | EN60335-1, IEC 62109-1 |
| EMC | EN 61000-6-1, EN 61000-6-3, ISO 7637-2 |
Specs & Info