VEVOR 520W 40A DC-to-DC Battery Charger with MPPT Solar Charging

Keep an RV, camper, trailer, overlanding, or vehicle auxiliary battery system charged while you're on the road with the VEVOR 520W 40A DC-to-DC Battery Charger. Designed to accept charging power from a compatible vehicle alternator as well as a compatible solar setup, this charger combines high-output DC charging with built-in MPPT solar charging in one unit.

With up to 40A charging current, 520W maximum output, and manufacturer-rated conversion efficiency of up to 94%, the charger provides a dedicated way to replenish compatible auxiliary and house batteries while traveling or when solar energy is available.

Alternator & Solar Charging in One Unit

The VEVOR charger can receive charging power from two primary sources:

• Compatible vehicle alternator
• Compatible solar-panel system

This gives RV, camper, trailer, and overlanding setups the ability to charge an auxiliary battery while driving and make use of available solar energy when appropriately configured.

The charger can prioritize solar energy when solar input is available, helping reduce charging demand on the vehicle alternator.

Built-In MPPT Solar Charging

Integrated Maximum Power Point Tracking (MPPT) technology is designed to optimize available power from a compatible solar-panel system.

MPPT charging adjusts operation according to available solar input to help make more effective use of changing sunlight conditions.

Solar performance varies according to panel compatibility, panel wattage, sunlight, temperature, shading, panel angle, wiring, system voltage, and other conditions.

Up to 40A / 520W Charging Output

The charger supports up to 40A charging current with a manufacturer-listed maximum output of 520W.

Manufacturer-rated conversion efficiency is up to 94% under applicable operating conditions.

Actual charging power and efficiency depend on system voltage, battery condition, charging stage, alternator output, solar input, temperature, wiring, configuration, and other operating factors.

12V & 24V System Compatibility

Wide 12V / 24V compatibility allows the charger to support multiple electrical-system configurations.

Supported configurations include:

• 12V-to-12V
• 12V-to-24V
• 24V-to-12V
• 24V-to-24V

The correct system configuration must be selected for the specific vehicle electrical system and auxiliary battery being used.

Compatible with Multiple Battery Chemistries

The charger supports several commonly used battery types, including:

• LiFePO4
• Lead-Acid
• GEL
• AGM
• Calcium

Two included DIP-switch keys provide a convenient way to select the appropriate battery type and charging configuration.

Correct battery selection is important because different battery chemistries require different charging characteristics.

Emergency Reverse-Charging Capability

The charger incorporates a reverse-charging function that can provide another useful option in compatible vehicle auxiliary-battery systems.

If the vehicle starter battery becomes low, the system can support reverse charging from the auxiliary battery when the system is properly configured and the function is used according to the manufacturer's instructions.

This feature should be considered a backup charging capability rather than a substitute for maintaining a healthy starter battery.

LED Status Indicator

An integrated LED indicator provides operating-status information, making it easier to check charger condition during use.

Install the charger where its indicators can be inspected while still meeting all manufacturer requirements for mounting, ventilation, wiring, environmental protection, and clearance.

Active Cooling Fan

A built-in cooling fan helps manage operating temperature during higher charging loads.

Adequate ventilation around the charger remains important. Do not obstruct cooling openings or install the charger where heat cannot dissipate properly.

Built-In Electrical Protection

Manufacturer-listed protection features include:

• Overvoltage Protection
• Undervoltage Protection
• Reverse-Polarity Protection
• Overtemperature Protection
• Short-Circuit Protection

These protection systems provide additional safeguards against certain abnormal electrical conditions but do not replace correct installation, wiring, fusing, grounding, configuration, or maintenance.

Designed for RV & Vehicle Auxiliary Power Systems

Recommended applications include:

• RV electrical systems
• Camper vans
• Travel trailers
• Overlanding vehicles
• Auxiliary and house-battery systems
• Solar-assisted vehicle charging
• Off-grid vehicle power systems
• Compatible backup-power systems

Specifications

Brand: VEVOR
Product Type: DC-to-DC Battery Charger with MPPT
Model: C40AMPPT
Maximum Charging Current: 40A
Maximum Output Power: 520W
Input System Voltage: 12V / 24V
Charging Voltage Range: 12.6V–29.4V
Manufacturer-Rated Maximum Conversion Efficiency: Up to 94%
Solar Charging Technology: MPPT
Charging Sources: Compatible Vehicle Alternator & Solar Input
Supported System Configurations: 12V-to-12V, 12V-to-24V, 24V-to-12V & 24V-to-24V
Compatible Battery Types: LiFePO4, Lead-Acid, GEL, AGM & Calcium
Battery Selection: DIP-Switch Configuration
Reverse Charging: Supported
LED Status Indicator: Yes
Active Cooling Fan: Yes

Safety & Protection

• Overvoltage Protection
• Undervoltage Protection
• Reverse-Polarity Protection
• Overtemperature Protection
• Short-Circuit Protection
• Active Cooling

Important Installation Information

This is high-current DC electrical equipment. Installation should only be performed by someone who understands automotive/RV electrical systems or by a qualified installer.

Before installation, verify:

• Vehicle and auxiliary-battery system voltage
• Battery chemistry and charging requirements
• Alternator specifications
• Solar-panel and solar-array compatibility
• Required conductor/wire size
• Cable length and voltage drop
• Fuse or circuit-protection requirements
• Grounding requirements
• Connector and terminal ratings
• Mounting location and ventilation requirements

Both 12V and 24V systems are supported, but the correct charging configuration and battery setting must be selected for the specific electrical system being used.

Never assume a battery is compatible based only on its nominal voltage. Confirm the battery manufacturer's charging requirements before configuration.

Solar panels, batteries, alternator, and other system components are not included unless specifically identified in the package contents.

Do not exceed the manufacturer's electrical ratings. Undersized wiring, loose connections, improper fusing, incorrect polarity, poor grounding, or improper configuration can result in overheating, equipment damage, fire, or other hazardous conditions.

Follow the manufacturer's installation instructions and all applicable vehicle, RV, battery, and electrical requirements.