The Victron BlueSolar PWM-Light 48-20 is a robust PWM solar charge controller designed for 48 V battery systems with a higher charging capacity. It features efficient three-stage battery charging and an integrated load output with lighting control, making it well suited for off-grid solar installations such as lighting systems, remote power sites, and small autonomous energy systems. With advanced electronic protections, low self-consumption, and straightforward configuration via a seven-segment display, the 48-20 ensures reliable and long-term operation.
Key Features
- Designed for 48 V battery systems
- 20 A rated charge current
- Integrated load output with low-voltage disconnect
- Lighting control function with timer options
- Three-stage battery charging: bulk, absorption, float
- Seven-segment display for quick setup and monitoring
- Automatic load disconnect for battery protection
- Electronic protections against reverse polarity, short circuit, overload, and over-temperature
- Low self-consumption (< 10 mA)
- Common positive grounding
- Compact and lightweight enclosure
Technical Specifications
General
| Parameter |
Specification |
| Battery voltage |
48 V |
| Rated charge current |
20 A |
| Automatic load disconnect |
Yes |
| Maximum solar voltage |
100 V |
| Self-consumption |
< 10 mA |
| Load output |
Manual control + low-voltage disconnect |
| Grounding |
Common positive |
| Operating temperature range |
-20 °C to +50 °C (full load) |
| Humidity (non-condensing) |
Max. 95% |
Battery Charging Parameters
| Charging Parameter |
Value |
| Bulk charge voltage |
58.0 V |
| Absorption charge voltage |
56.8 V |
| Float charge voltage |
55.2 V |
| Low-voltage load disconnect |
44.8 V |
| Low-voltage load reconnect |
50.4 V (manual) / 52.4 V (automatic) |
Protection
| Protection Type |
Description |
| Reverse polarity |
Battery reverse polarity fuse |
| Overload protection |
Shutdown after 60 s at 130% load; 5 s at 160% load |
| Short circuit |
Immediate shutdown |
| Over-temperature |
Yes |
Mechanical & Compliance
| Item |
Specification |
| Protection class |
IP20 |
| Terminal size |
6 mm² / AWG 10 |
| Weight |
0.17 kg |
| Dimensions (H × W × D) |
95 × 140 × 33.5 mm |
| Safety standard |
IEC 62109-1 |
| EMC standards |
EN 61000-6-1, EN 61000-6-3 |
