Xantrex TRUEcharge3 12V 40A Marine Battery Charger
The Xantrex TRUEcharge3 40A is a compact, power-factor-corrected onboard charger for 12V marine battery systems. Its three DC output connections support charging up to three battery banks from shore or generator power, with selectable profiles for flooded, AGM, gel and LiFePO4 batteries. The universal 90–265V AC input accommodates shore power at different voltages and frequencies. Microprocessor-controlled bulk, absorption and float charging helps replenish and maintain batteries efficiently.
Quiet Mode reduces fan noise by limiting charging output; protection features include reverse polarity, short-circuit, DC over-voltage and overheating safeguards. An optional TRUEcharge3 remote panel (part 808-8040-10, sold separately) provides advanced monitoring and enables parallel operation with a second compatible charger. For multi-bank installations, check chemistry and system compatibility before wiring. Manufacturer warranty: five years.
Manufacturer | Xantrex |
Category | Battery Chargers and Equipment |
Item Number | 804-1240-10 |
Series | TRUEcharge3 |
Protections/ Certifications | CE (Low Voltage and EMC Directives); CSA 60335-2-29; UL1564; IEC 60335-2-29; ABYC A-31; IP32; FCC Part 15B; DOE/CEC |
Connection/Terminal | 3 positive DC terminals; 1 negative DC terminal; hardwired AC input |
Dimensions | 70 × 170 × 250 mm |
Weight | 2.2 kg (4.8 lb) |
Voltage Type | DC |
Nominal Voltage | 12 V |
AMPS/Current Rating | 40 A |
Spec Sheet | View Manufacturer Spec Sheet |
- Nominal output: 12 V DC
- Maximum total charging output: 40 A
- DC output connections: 3 positive, 1 common negative; up to three battery banks
- AC input: 90–265 V AC, 47–63 Hz (120/230/240 V AC nominal)
- Battery profiles: flooded lead-acid, AGM, gel and lithium iron phosphate (LiFePO4)
- Bulk / absorption / float multistage charging; selectable two- or three-stage operation
- Charge voltage: 14.2–15.5 V DC; float: 13.4–13.8 V DC; equalize: 16 V DC where applicable
- Minimum recommended battery-bank size: 80 Ah
- Power-factor-corrected charging; charger efficiency greater than 80%
- Dimensions (H × W × L): 70 × 170 × 250 mm (2.8 × 6.7 × 9.8 in); weight: 2.2 kg (4.8 lb)
- Operating temperature: 0–60 °C; enclosure rating: IP32
- Optional TRUEcharge3 remote panel (808-8040-10) required for parallel stacking of two chargers
- Manufacturer warranty: five years; consult datasheet for detailed compatibility
Corrected from the obsolete TRUEcharge2 -02 catalog listing to Xantrex TRUEcharge3 -10. Retail price verified for exact SKU in Ward’s August 27, 2026 price list.
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