# Xantrex TRUEcharge3 40A 3 Bank Battery Charger - 12V [804-1240-10]

**TRUEcharge™3 40A 3 Bank Battery Charger - 12V**

TRUEcharge3 battery chargers lead the industry with a small footprint and ultra-compact design. In addition to meeting global safety and regulatory standards, they feature low electrical interference and efficient power factor-corrected multistage charging. The TRUEcharge3 Chargers can be mounted in multiple positions thanks to their inherent drip-proof design characteristics. Unlike its predecessors, TRUEcharge3 is lithium-ion battery compatible.

Designed for recreational and commercial applications worldwide, TRUEcharge3 accepts 90–265 Vac, and 47–63 Hz, which makes traveling abroad and handling poor-quality power a breeze. The easy-to-read display of the TRUEcharge3 12 V models can be enhanced with an optional remote panel. Each model has built-in protection against surges and spikes on the AC power line.

**Features:**

-   Microprocessor-controlled, multistage charging algorithms
-   Settings for two and three-stage charging
-   Battery-equalization feature
-   Settings for flooded, gel, AGM, or lithium-ion batteries
-   Equipped with parallel stacking (remote panel required)
-   Ability to charge batteries drained to extremely low voltage
-   Added quiet mode

**Protection Features:**

-   Reverse-battery polarity protection
-   Drip-proof design
-   DC over-voltage protection
-   Over-temperature protection
-   Circuit breaker protection

**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 to prevent damage and maintain batteries at a full charge for the remaining 20–30% of charge, bringing the battery to a full charge at a slow, safe rate

**Power Factor Corrected (PFC) Charging**

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

**Electrical Specifications (@ 25 degrees C unless otherwise noted):**

-   Output Current (nominal): 40 A 
-   Output Voltage (nominal, depending on settings): Charge 14.2–15.5; Float 13.4–13.8 Vdc; 16 V
-   DC Output Connections: Three
-   AC Input Voltage: 90–265 Vac; 47–63 Hz 120 Vac, 230 Vac, 240 Vac nominal
-   Temperature Compensation: Three settings 
-   Charger Efficiency: > 80%
-   Battery Type: Gel, Flooded, AGM, LiFePO4 
-   Minimum Recommended Battery Bank Size: 80 Ah

**General Specifications:**

-   Operating Temperature Range: 0–60°C (32–140°F) 
-   Storage Temperature -40–80°C (-40–176°F)
-   Battery Connection: Three positive terminals and one negative terminal
-   Dimensions (H x W x L): 70 x 170 x 250 mm (2.8 x 6.7 x 9.8”)
-   Weight 2.2 kg (4.8 lb)

**Regulatory Approvals** 

Meets CSA 60335-2-29, CE Marked for the Low Voltage Directive (safety) and the EMC Directive, UL1564, IEC 60335-2-29, IP32 per EN.IEC 60529, FCC Part 158, Canada ICES-003 Class B emissions limits, ABYC A-31, and DOE/CEC energy efficiency compliant.

**This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.**

**Specifications:**

-   Charger Output - Amps: 40a
-   Charger Output Voltage: 12v
-   Charging Banks: 3
-   Portable: No
-   Box Dimensions: 6"H x 11"W x 14"L WT: 6.1 lbs
-   UPC: 715535920814

  
[Quick Guide (pdf)](https://productimageserver.com/literature/quickGuide/101671QG.pdf)  
[Owner's Manual (pdf)](https://productimageserver.com/literature/ownersManual/101671OM.pdf)  
[Brochure (pdf)](https://productimageserver.com/literature/brochure/101671BR.pdf)

## Details

- **Price:** 669.05 USD
- **Type:** Battery Chargers
- **Tags:** Automotive/RV, Automotive/RV | Battery Chargers, Brand_Xantrex

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 669.05 USD | In stock |

## Images

- Xantrex TRUEcharge3 40A 3 Bank Battery Charger - 12V [804-1240-10] Xantrex
- Xantrex TRUEcharge3 40A 3 Bank Battery Charger - 12V [804-1240-10] Xantrex
- Xantrex TRUEcharge3 40A 3 Bank Battery Charger - 12V [804-1240-10] Xantrex
- Xantrex TRUEcharge3 40A 3 Bank Battery Charger - 12V [804-1240-10] Xantrex

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> Source: [Besafe1st](https://besafe1st.com/products/xantrex-truecharge3-40a-3-bank-battery-charger-12v-804-1240-10)
> Updated: 2026-05-22