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XANTREX  TRUECHARGE2 20, 40  20 Amp and 40 Amp 12V Multistage Battery Chargers

High Performance, Multistage Charging

Redesigned, High Performance, Worldwide Charging – Xantrex TRUECHARGE2 Battery Chargers lead the industry with a small footprint and ultra-compact design.

The  XANTREX TRUECHARGE2 40-12 40A,12V BATTERY CHARGER  is Designed primarily for marine and commercial applications worldwide, TRUECHARGE2 Battery Chargers are unmatched for reliability. Available in two 12-volt models, they are versatile enough to be used in a wide variety of conditions and locations. Auto-ranging AC input voltage capability (90 – 265 volts AC) makes traveling abroad and handling poor-quality power a breeze. The easy-to-read display can be augmented with an optional remote panel.

Truecharge 20/40

  • 12-volt models available in 20 A and 40 A
  • Microprocessor-controlled, multistage charging algorithms
  • Settings for two and three-stage charging
  • Settings for flooded, gel, AGM or lead-calcium batteries
  • Auto-ranging universal input voltage (90-265 Vac, 47-63 Hz) is also compatible with a generator or other low-quality power sources
  • Temperature-compensated charging
  • Power factor corrected for efficient charging
  • Battery-equalization feature
  • Ability to charge ‘dead’ batteries
  • Battery temperature sensor available (Part #808-0232-01)
  • Optional remote display includes a maximum charger output control Available mid 2009 (Part #808-8040-00)

Protection Features

  • Reverse battery polarity protection
  • Drip-proof design
  • Over and under-temperature protection
  • DC over-voltage protection
  • Battery overcharging protection
  • Ignition protection
Electrical Specifications
Models TRUECHARGE2 20 / 40
Output current (nominal) 20 A / 40 A
Output voltage (nominal, depending on settings)
Charge 14.2 – 15.5 Vdc
Float 13.4 – 13.8 Vdc
Equalize 16 Vdc
DC output connections Three
AC input voltage 1 90-265 Vac 47-63 Hz
120 Vac, 230 Vac, 240 Vac nominal
Temperature compensation Three settings or optional remote battery temperature sensor
Charger efficiency > 80%
Battery type Gel, Flooded, AGM and Pb-Ca
Recommended battery size 100 Ah to 400 Ah
General Specifications
Operating temperature 2 0 to 65°C
Storage temperature -40 to 80°C
Battery connection Three positive terminals
One negative terminal
Dimensions (H x W x L) 2.8 x 6.7 x 9.8″
(70 x 170 x 250mm)
Weight 4.8 lb (2.2 kg)
Warranty Two year
Part Numbers 804-1220, 804-1240
Remote Panel 808-8040-00
Battery Temperature Sensor 808-0232-01


Three-Stage Charging: Multistage charging ensures batteries receive optimum charging, but with minimal wear and tear, regulating the voltage and current delivered to the batteries in three automatic stages:

  • Bulk:  Replaces 70-80% of the battery’s state-of-charge at the fastest possible rate.
  • Absorption:  Replenishes the remaining 20-30% of charge, bringing the battery to a full charge at a slow, safe rate.
  • Float:  Voltage is reduced and held constant in order to prevent damage and maintain batteries at a full charge.

Power Factor Corrected (PFC)

Less shorepower is required for charging batteries, freeing up more usable AC power for running electrical devices and appliances and reducing the likelihood of tripping shorepower breakers.

Regulatory Approvals

CSA E60335-2-29, UL1564, and UL1236 including the Marine Supplement, drip test, and Ignition Protection ratings. CE Marked for the Low Voltage Directive
(safety) and the EMC Directive. Complies with IEC 60335-2-29 including Australian deviations. Ingress protection rating IP32 per EN/IEC 60529. Complies with FCC Part 15B and Industry Canada ICES-003 Class B emissions limits. Complies with ABYC A-31.

1 90 – 105 Vac ± 4 Vac output de-rated to 80% of full load current.
2 Between 50° and 65°C DC output current de-rated. Highly Accelerated Life Tested (HALT) to -20°C.
Note:  Specifications subject to change without notice.

Additional information

Weight 10 lbs


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