Xantrex C-Series Solar Charge Controller – 40A – C40

The Xantrex C-Series C40 is a reliable 40-amp PWM solar charge controller designed for off-grid solar, RV, marine, and small to medium renewable energy systems. It efficiently regulates charging from solar panels to maintain battery health and extend battery life.

Featuring three-stage battery charging and support for multiple battery types—including flooded, AGM, and gel—the C40 ensures safe, efficient charging. The controller can be configured as a solar charge controller, load controller, or DC diversion controller, providing flexibility for a variety of system setups. Its rugged aluminum enclosure and passive cooling allow for durable operation in harsh environments.

Ideal for off-grid cabins, RVs, boats, and backup solar power systems, the Xantrex C40 delivers dependable performance in compact, easy-to-install form.

🔧 Technical Specifications

Electrical

• Controller Type: PWM (Pulse Width Modulation)

• Maximum Charge Current: 40 amps

• System Voltage: 12 / 24 / 48 VDC (auto-select)

• Maximum PV Open-Circuit Voltage: 125 VDC

• Battery Voltage Range: 8 – 60 VDC

• Charging Stages: Bulk, Absorption, Float

• Maximum Load Current (Load Mode): 40 amps

Battery Compatibility

• Flooded Lead-Acid

• AGM

• Gel

• Configurable via jumper settings

Functional Modes

• Solar charge controller

• Load controller

• DC diversion (dump load) controller

Protection & Safety

• Over-current protection

• Reverse polarity protection

• Over-temperature protection

• Short-circuit protection

• Passive cooling

Environmental

• Operating Temperature Range: -40°F to 122°F (-40°C to 50°C)

• Humidity: 95% non-condensing

Physical

• Dimensions (H × W × D): Approx. 6.0″ × 3.8″ × 2.8″

• Weight: Approx. 1.3 lb (0.6 kg)

• Mounting: Vertical wall mount

• Enclosure: Powder-coated aluminum

Certifications

• UL Listed

• CSA Certified

• FCC Class B

Warranty

• 5-Year Manufacturer Warranty

⭐ Key Features 

• 40-amp solar charge controller for off-grid systems

• Supports 12V, 24V, and 48V DC battery banks

• Three-stage charging for flooded, AGM, and gel batteries

• Configurable as solar charge, load, or diversion controller

• Heavy-duty aluminum enclosure with passive cooling

• Compact and durable for RV, marine, and cabin installations

PV charge, diversion and load controller

The C35 and C60 are field configurable for 12 V and 24 V operation. The C40 may be configured for 12 V, 24 V, or 48 V operation. C35, C40 and C60 charge controllers can be used as a charge, diversion, or load controller and come with a standard multi-color charge status LED face plate.

A Controller for Virtually any DC Charging Source. The C60 is a fully solid state, microprocessor-driven controller that is UL and cUL listed. C Series controllers may be configured for PV battery charging, or DC load control or DC diversion operation. Whatever the charging source, a C Series controller is sure to meet your DC controller needs.

Silent Microprocessor Control-All C Series controllers have a powerful microprocessor at their core which increases system performance and maximizes battery life. They are fully solid state and operate silently.

Features:

• Improve battery life with pulse width modulated (PWM) multi-stage temperature compensated charging
• Two-year standard warranty
• PV charge, diversion, load controller
• Available remote display with cumulative AMP hours
• Electronic protection against short-circuit, overload, and over-temperature conditions
• Tolerance to hostile environments with conformal-coated boards and powder-coated enclosure
• Field adjustable voltage and battery set point
• Automatically disconnects from the battery at night
• Compatible with negative ground and ungrounded systems

WARNING: This product can expose you to chemicals including Diisononly Phthalate (DINP) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.