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BCDC2420 — 24V 20A Under Bonnet DC-DC Charger with MPPT Solar Input
BCDC2420
24V to 24V DC-DC charger for trucks, buses and large 4WDs on 24V systems. 20A continuous output (600W), MPPT solar input, sealed and fanless for under-bonnet mounting.
$799.00
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24V INPUT, 24V AT 20A
Purpose-built 24V DC-DC charger for 24V vehicles charging a 24V auxiliary bank.
3-STAGE CHARGING, ANY CHEMISTRY
Selectable charge profiles for AGM, gel, calcium, standard lead-acid and lithium banks.
SEALED FOR ENGINE-BAY HEAT
Rated to run in the engine bay of an Australian 4WD or truck — dust, water and vibration tolerant.
LITHIUM AND AGM READY
Selectable profiles for AGM, gel, calcium, standard lead-acid and LiFePO4 lithium banks.
2 YEAR REDARC WARRANTY
Backed by 2 years direct from Redarc. Repair or replacement in accordance with Redarc's warranty policy.
A 24V to 24V DC-DC charger for trucks, buses, service utes and larger 4WDs running a 24V starter system. Runs a 24V auxiliary bank from the alternator while driving, with MPPT solar input so a 12V panel can top the bank up at camp. Fits under the bonnet behind a sealed, fanless chassis rated for engine-bay heat, dust and vibration.
The chassis is 150 by 120 by 37mm and weighs 650g, with bare-wire input, output and solar tails for straight-in wiring. Operates across a 9 to 32V DC input range so it runs from a 12V alternator just as happily as from a 24V one, outputs 20A continuous (600W) and holds a maximum charging voltage of 30.6V. Multi-stage charging covers AGM, gel, calcium content, VRLA and standard lead acid.
Output is 24V, so if you run a 24V vehicle with a 12V auxiliary bank this is not the right charger. Fuse the input at 60A and the output at 40A with Redarc FK60 and FK40 kits fitted at the battery ends, not at the charger.
What sets it apart
MPPT solar input — a 12V panel charges a 24V bank directly
Sealed and fanless — rated for under-bonnet heat, dust and vibration
Start battery isolator — stops the aux bank draining the cranking battery
Multi-stage charging — profiles for 5 common lead-acid chemistries
9-32V DC input — one unit works from 12V or 24V vehicles
Australian designed and built — Lonsdale SA, 2-year Redarc warranty
Mounting and install
Mounts under the bonnet with 4 fixing holes on the base plate. Leave 50mm clearance for airflow around the heatsink even though the chassis is fanless. Our workshop runs the input in 6 B&S cable from the start battery with the 60A fuse at the battery end, and the output in 6 B&S cable to the aux bank with the 40A fuse at the aux battery end. The solar input takes a panel with a Voc between 9V and 32V, wired in cable sized to the panel's short-circuit current.
On late-model vehicles with a smart alternator or stop-start system, and on any build running more than one BCDC (for example one on the vehicle and one on a caravan), hardwire an ignition trigger from a switched 12V source so all chargers only run while the engine is running. We fit this on every workshop install.
- MPPT solar input — a 12V panel charges a 24V bank directly
- Sealed and fanless — rated for under-bonnet heat, dust and vibration
- Start battery isolator — stops the aux bank draining the cranking battery
- Multi-stage charging — profiles for 5 common lead-acid chemistries
- 9-32V DC input — one unit works from 12V or 24V vehicles
- Fuse kit guidance — Redarc FK60 input and FK40 output kits
- Australian designed and built — Lonsdale SA, 2-year Redarc warranty
Electrical
Input Voltage: 9–32V DC
Output Voltage: 24V DC
Continuous Output: 20A (600W)
Max Charging Voltage: 30.6V
Input Fuse Rating: 60A
Output Fuse Rating: 40A
No-Load Current: <100mA
Standby Current: <8mA
Solar Input
Solar Input Range: 9–32V DC
Solar Switch-On: 17.5V
Charging and build
Operating Temp: −20°C to +80°C
Approvals: E-Mark, CE
