REDARC
20A Under Bonnet DC-DC Battery Charger
20A Under Bonnet DC-DC Battery Charger
SKU:BCDC1220
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⚡ REDARC BCDC1220 20A Under Bonnet DC-DC Battery Charger
Australian-made under bonnet DC-DC battery charger for 12V and 24V vehicle systems, with multi-stage charging, start battery isolation, rugged sealed electronics, bare wire connection, and support for AGM, gel, calcium, VRLA, and standard lead acid batteries.
The REDARC BCDC1220 20A Under Bonnet DC-DC Battery Charger is designed to keep your auxiliary battery charged while driving.
Built for harsh Australian conditions, this compact DC-DC charger converts power from a 12V or 24V vehicle system into the correct charging profile for compatible 12V auxiliary batteries. With multi-stage charging, sealed electronics, no fan, and a wide input voltage range of 9V to 32V, it is suitable for vehicle, trailer, engine bay, cabin, canopy, and marine-style installations.
The BCDC1220 is designed for AGM, gel, standard lead acid, calcium, and VRLA batteries. It is not suitable for lithium LiFePO4 batteries.
✅ Key Benefits
⚡ Under Bonnet DC-DC Charging
Designed for rugged under bonnet auxiliary battery charging while driving.
🚗 12V & 24V Vehicle Compatible
Accepts input from both 12V and 24V vehicle systems.
🔋 Multi-Stage Battery Charging
Uses multi-stage charging to help charge compatible auxiliary batteries correctly.
🛡️ Start Battery Isolator
Built-in start battery isolation helps protect the vehicle starting battery.
🔇 No Fan Operation
Fanless design provides quiet operation and reduces moving parts.
🌧️ Sealed Electronics
Designed to handle water, dust, vibration, rough tracks, and harsh environments.
🇦🇺 Designed, Built & Tested in Australia
Developed for Australian touring, off-road, and under bonnet conditions.
🚙 Engine Bay Installation Suitable
Potted and rugged construction makes it suitable for under bonnet installation.
🔌 Bare Wire Connection
Bare wire connection allows flexible vehicle installation.
🚐 Suitable Applications
🚙 4WD dual battery systems
🚗 Under bonnet auxiliary battery charging
🛻 Ute and canopy power systems
🚚 Work vehicles and commercial vehicles
🚐 Caravan and trailer charging systems
⛵ Marine-style installations
🏕️ Camping and touring setups
🔋 AGM, gel, calcium, VRLA, and lead acid battery systems
🏜️ Remote travel and off-road touring
🔋 Battery Compatibility
The REDARC BCDC1220 is suitable for a range of common lead acid battery types.
| Battery Type | Supported |
|---|---|
| AGM | Yes |
| Gel | Yes |
| Standard Lead Acid | Yes |
| Calcium | Yes |
| VRLA | Yes |
| Lithium LiFePO4 | No |
This model is not suitable for lithium LiFePO4 batteries.
⚡ Charging Performance
| Charging Feature | Details |
|---|---|
| Power Type | DC to DC |
| Input Voltage Range | 9V to 32V |
| Output Voltage | 12V DC |
| Maximum Charging Voltage | 15.3V |
| Maximum Rated Output Current | 11A from 12V vehicle / 20A from 24V vehicle |
| Nominal Output Power | 148W from 12V vehicle / 294W from 24V vehicle |
| Charging Type | Multi-stage |
| MPPT Solar Regulator | No |
🛡️ Rugged Under Bonnet Design
The BCDC1220 is built for demanding installations where vibration, heat, dust, and moisture can be a concern.
| Feature | Details |
|---|---|
| Engine Bay Install | Yes |
| Cabin / Canopy Install | Yes |
| Trailer Install | Yes |
| Operating Temperature | -20°C to +80°C |
| No Load Current | <100mA |
| Standby Current | <5mA |
| Cooling Design | No fan |
| Electronics | Sealed and ruggedised |
🔌 Installation Details
| Installation Feature | Details |
|---|---|
| Connector Type | Bare wire |
| Input Fuse Rating | 16A to 23A, not supplied |
| Output Fuse Rating | 31A, not supplied |
| Suitable for 12V Systems | Yes |
| Suitable for 24V Systems | Yes |
| Start Battery Isolator | Yes |
📏 Technical Specifications
| Specification | Details |
|---|---|
| Product | REDARC BCDC1220 20A Under Bonnet DC-DC Battery Charger |
| Power Type | DC to DC |
| Battery Chemistry | AGM, Gel, Standard Lead Acid, Calcium, VRLA |
| Lithium Compatibility | Not suitable for Lithium LiFePO4 |
| Input Voltage | 9V to 32V |
| Output Voltage | 12V DC |
| Maximum Charging Voltage | 15.3V |
| Maximum Rated Output Current | 11A from 12V vehicle / 20A from 24V vehicle |
| Nominal Output Power | 148W from 12V vehicle / 294W from 24V vehicle |
| MPPT Solar Regulator | No |
| No Load Current | <100mA |
| Standby Current | <5mA |
| Input Fuse Rating | 16A to 23A, not supplied |
| Output Fuse Rating | 31A, not supplied |
| Connector Type | Bare wire |
| Operating Temperature | -20°C to +80°C |
📐 Dimensions & Weight
| Measurement | Details |
|---|---|
| Length | 100mm |
| Width | 120mm |
| Height | 37mm |
| Weight | 450g |
⚠️ Fitment & Installation Note
Please confirm your required battery chemistry, vehicle voltage, battery capacity, alternator type, cable sizing, fuse protection, mounting location, ventilation, and charging current requirements before purchase or installation.
Important:
✅ Suitable for 12V and 24V vehicle systems
✅ Designed for under bonnet installation
✅ Suitable for cabin, canopy, trailer, and engine bay installations
✅ Multi-stage DC-DC charging
✅ Built-in start battery isolator
✅ No fan for quiet operation
✅ Charges AGM, gel, standard lead acid, calcium, and VRLA batteries
✅ Input and output fuses are required but not supplied
⛔ Not suitable for lithium LiFePO4 batteries
⛔ Does not include MPPT solar regulation
⛔ Do not exceed battery manufacturer charging limits
⛔ Professional installation is recommended for vehicle, trailer, marine, and auxiliary battery systems
🔎 Why Choose the REDARC BCDC1220?
The REDARC BCDC1220 20A Under Bonnet DC-DC Battery Charger is designed for users who need a rugged, compact, and proven DC-DC charger for lead acid auxiliary battery systems.
With multi-stage charging, 12V and 24V vehicle input compatibility, sealed electronics, start battery isolation, fanless operation, and Australian design and testing, it is a reliable option for under bonnet, trailer, canopy, cabin, and harsh-environment installations.
📦 What’s Included
⚡ 1 x REDARC BCDC1220 20A Under Bonnet DC-DC Battery Charger
🛒 Order with Confidence
Choose the REDARC BCDC1220 Under Bonnet DC-DC Battery Charger for reliable auxiliary battery charging, rugged sealed construction, start battery protection, and dependable REDARC performance in Australian touring and work vehicle conditions.
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