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Jaycar

Perfect for automotive and solar applications.

Features:
·Universal DC input 12.0V-30.0V士0.2V For Solar/12.0V-15.0V士0.2V For car
·Compatible with Lead Acid,Li-ion, Gel and AGM batteries
·Fitted with colour-coded 50A high-current (Anderson-compatible) connectors
·High efficiency and high reliability
·Battery type select function
·Protection :Short Circuit/Over-temperature/Reverse polarity
·E24/CE/RoHs approved
·IP65-rated enclosure - dust tight and watertight against light pressure water spray

Specifications:
Input voltage
     - Solar charging: 12.0V-30.0V±0.2V
     - Car generator charging : 12.0V-15.8V±0.2V

Output voltage
     - GEL: 14.2V±0.2V
     - CAL: 14.2V±0.2V
     - STD: 14.4V±0.2V
     - AGM: 14.8V±0.2V
     - LiFePo4: 14.6V±0.2V

Output current : 20A±0.5A
Charging efficiency: Full load ≥90%;Maximum efficiency reaches 97%

Plugs to suit those supplied with the charger: Grey: PT4425 / Red: PT4426 / Yellow: PT4543

Working mode
1.    Solar charging (default priority)
2.    Car generator charging
3.    Five speed battery type adjustment

Product size : 205x105x51mm (230mm long including mounting flanges)
Product weight : 1.2KG 

Note: the battery plug (red) will not connect to battery boxes as it is physically different to the plugs used on battery boxes. You will need to buy a plug set to change this plug housing to suit a battery box.

Length:200.0 mm
Width:105.0 mm
Height:51.0 mm
Weight:1.25 kg
Dimension details:200*105*51MM

12V 20A DC-DC Charger

Cat. No: MB3938
3.0(2)
$169
Bulk Pricing
Buy More, Save More! Bulk pricing applies automatically in cart.
Qty 1-1
$169.00 / unit
Qty 2-3
$151.95 / unit
Best Value
Qty 4+
$151.95 / unit
30-Day Returns
Australian Stock
Warranty Included
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Customer Reviews

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Be warned

PaulMarch 2026

I have tried two of these chargers after the first was returned under warranty - the second will be returned for a refund. Worked for a day or two then just stopped! Setup was in a ford transit, charging an AGM battery. Solar panel hooked up as well. Simple to set up, but for some reason they just stop. Staff have no idea. Instructions are vague regarding the ACC connection - the instructions refer to the generator, ie the alternator. I hope it works for you - has cost me a fortune in wasted time and fuel replacing and testing.

Helpful?

No brainer. Does the trick.

Gordon87May 2025

Had the older model for 2 and a half years on a 2018 ford transit custom. Zero dramas. Forget redarc

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