Enerdrive 12V 20A  AC Battery Charger EN31220

Enerdrive ePOWER 12V 20A Battery Charger Lithium, AGM, Gel

Enerdrive ePOWER 12V 20A Battery Charger Lithium, AGM, Gel

Regular Price $348.00 Special Price $315.00

Enerdrive ePOWER 12V 20A Fully Automatic Battery Charger - Lithium, AGM, Gel

Availability: In stock

Enerdrive ePower 20amp 12v Battery Charger EN31220

The Enerdrive ePOWER 12V 20A Battery Charger is a fully automatic, “set and forget” charger. It is designed to quickly and accurately recharge your batteries using algorithms that help maximise service life. Multistage smart charging technology enables the charger to be connected to your battery banks permanently. The ePower 20 amp, 12 volt smart battery charger with display and the ability to charge 3 separate battery banks. Suitable for caravans, camper trailer, motorhomes and boats. Profiles to charge GEL, AGM, Flooded, Lithium and even full custom profiles are included.

Future Proof Lithium Battery Charging - Built In

Lithium batteries require a constant current / constant voltage charge algorithm. The Enerdrive ePOWER charger has a class leading Profile for charging all types of Lithium batteries to their full potential. This setting delivers the full rated output of the charger constantly with the charger switching to power supply mode once the voltage peak is met (indicating a full battery bank). Also feature fully customisable charge rate and end voltage settings;

  • Select Charger Voltage Constant: 13.9, 14.0, 14.1, 14.2, 14.3, 14.4, 14.5, 14.6 Volts
  • Select Charger Current: 5A, 10A, 15A, 20A  - So you can charge different size batteries or battery banks

Industry Leading Warranty

5 Year Product Warranty & Lifetime Technical Support . They also promote a track record of near perfect resolve - Purchase any Enerdrive Product with peace of mind your covered by a company at the forefront of lithium battery systems in Australia.


Display Panel

The ePOWER 20A Battery Charger display gives you all the information you need for the operation of your charger. At a glance, key information such as charger amps, battery voltage and charge state continually alternate on the screen. When in float / power supply mode, the load amps are displayed so you can see exactly what the charger is doing. The display also allows you to program all settings of the charger, as well as activate the silent mode.

Silence when you need it – By pressing the “SEL” button for 5 seconds, the ePOWER Charger enters the ‘Silent’ mode that prohibits the fan from working. This ensures totally silent and safe operation at night, ideal if the charger is located close to your sleeping quarters. Silent mode limits current output to no more than 50%, and is programmed to remain on for 12 hours before automatically returning to a normal ‘fan-on & full output’ setting.



  • Charge GEL, AGM, Flooded, Lithium with specific charge profiles inbuilt 
  • Multistage Charging: Fully automatic multistage 20A battery charger with the ability to charge 3 separate battery banks.
  • Separate Battery Banks: Isolated charging design where battery bank one is separate from battery bank two and three.
  • Programmable: Battery bank 1 can be programmed with a different charge algorithm over banks 2 and 3.
  • Current Control: User adjustable current output (e.g. Dial the 20amp unit back to run off a 1kVA generator).
  • Smart Charging: The ePOWER 20A battery charger will regulate its output based on the loads connected to your battery banks.
  • Wide AC Input Range: Operates on both 110V / 60Hz and 240V / 50Hz.
  • LED Display: Easy to use “set and select” menu along with scrolling charger status.
  • Silent Mode: Disables the cooling fan for total silent operation at night or whenever required & reduces charge output by half and locks out fan for 12 hours.
  • Temperature Sensor: Battery temperature sensor included with 3 meter cable.
  • 5 Year Warranty from an Australian company renowned for customer support.

Multistage Charging Process

As dictated by battery manufacturer’s recommendations, batteries require a multistage charge sequence for perfect, fast and accurate charging. Our ePOWER multistage smart 20A battery charger deliver four primary charge stages:-

Stage 1 – Bulk or Boost Charge; The battery is charged at full rated output current of the charger until the battery reaches its final charging voltage, known as its absorption voltage. In this step, around 80% of the battery capacity is recovered as fast as possible.

Stage 2 – Absorption Charge; With the charger voltage held steady the remaining 20% is replaced allowing the current to drop as the battery approaches its full charge.

Stage 3 – Float; Finally, in the float stage the charger voltage is lowered and held at a constant and safe predetermined level. This prevents the battery from being overcharged while supporting any additional loads connected to the battery, such as DC lighting and refrigerators. This stage allows for the charger to be used as a DC power supply.

Stage 4 – Maintenance; This stage is a regular timed “return to bulk” stage. After 7 days of constant operation in “float” the Enerdrive ePOWER Battery Charger will switch the charger from float to bulk to agitate the batteries electrolyte helping to provide an extended service life.


EN31220 Specifications

Model EN31220   EN31240 EN31260 EN32430 
Note: Specifications subject to change without notice.
Output Current (Maximum)  20A  40A  60A  30A
Charge 14.2 – 15.5 V  28.4 – 31.0V
Float 13.4 – 13.8 V  26.8 – 27.6V
– Equalize 16.0 V  32.0V
Charging Control Four stages (Bulk/Absorption/Float/Maintenance)
  Two stages (Bulk/Absorption)
  Constant Power Supply (Program setting)
  Priority Battery Bank Charging
DC Output Bank Three (1 fully independent, 2 common with diode isolation)
Selectable Battery Type Gel, AGM, Flooded, Lithium, Program
Standby Current < 2 mA
AC Input Voltage (Nominal) 90 to 265 VAC
AC Input Operating Range 207-265 Vac (2.0 A Max)90-125 Vac (3.8 A Max) 207-265 Vac (3.8 A Max)90 – 125 Vac (7.7 A Max) 207-265 Vac (5.9 A Max)90-125 Vac (11.3 A Max) 207-265 Vac (5.9 A Max)90-125 Vac (11.3 A Max)
AC Input Frequency Range 47 – 63 Hz
Power Consumption 350W (Full Load) 700W (Full Load) 1050W (Full Load) 1050W (Full Load)
Power Factor Correction Yes
Charger Efficiency > 82%
Reverse Polarity Yes, (with user replaceable fuse/s)
Over Charge Yes, unit shutdown
Over Temperature Yes, unit de-rated and shutdown
Output Short Circuit Yes, (with user replaceable fuse/s)
Cooling Forced air ventilation (thermo controlled fan)
Temperature Setting Hot, Normal, Cold (no sensor connected)
Battery Temp Sensor Port RJ12 (standard battery temp. sensor supplied)
LCD Display (with back light) Charging status, Battery Voltage, Output Current & Fault Codes.
AC Input Connection IEC with Supplied 1.2M Power Lead
DC Output Connection Heavy Duty Terminal (3 banks) – Pan Heads 6mm Thread
DC Output Ground Single Heavy Duty Common Ground Stud
Storage Range -40° to 70° C
Operating Range -20° to 60° C
Humidity 5-95%, relative humidity non-condensing
Ingress Protection IP32 (Basic drip proof in vertical orientation)
Base Unit Weight and Dimensions
Weight: (kg) 2.4 2.6 4.0 4.0
Dimension: (mm) L x W x H 295 x 206 x 86 295 x 206 x 86 356 x 206 x 99 356 x 206 x 99
Optional Accessories Remote Digital Display / Enerdrive Part Number EN3REM
Regulatory Compliance Complies with AS/NZS 60335.2.29 Including Australian deviations.
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