Introducing the Xantrex C40 PWM Charge Controller — a compact, intelligent solution engineered to protect and extend battery life while maximizing solar or DC charging efficiency. With pulse width modulation (PWM), multi-stage charging, and temperature compensation, the C40 delivers precise, battery-friendly power management for demanding off-grid or mobile setups.

Key benefits include silent operation, solid-state reliability, and field adaptability across a range of systems. The C40 supports PV charging, diversion, and DC load control, making it a versatile controller for virtually any DC charging source.

Configurable for 12 V, 24 V, or 48 V operation, these C Series controllers can be tuned for PV battery charging, DC load control, or DC diversion, so you can tailor performance to your battery bank and application. A remote display (available separately) provides cumulative amp-hours for easy monitoring and management.

Durable and safe, the C40 features electronic protection against short-circuit, overload, and over-temperature conditions. Built to endure harsh environments with conformal-coated boards and a powder-coated enclosure, it’s ready for challenging installations.

• PWM multi-stage charging with temperature compensation to optimize battery life and maintain performance across temperatures.
• Field-adjustable voltage and battery set points for precise charging profiles.
• Automatic nighttime disconnect to prevent battery drain when not charging.
• Two-year standard warranty for peace of mind.
• Negative-ground and ungrounded system compatibility for flexible installations.
• Versatile controller for PV charging, diversion, and DC load control on virtually any DC source.
• 12 V, 24 V, or 48 V operation and robust protection for hostile environments.
• Remote display option with cumulative amp-hours for easy monitoring.
• Silent microprocessor control delivering high performance with no moving parts.

Whether you're powering a solar setup, a battery bank, or alternative DC power sources, the Xantrex C40 PWM Charge Controller delivers reliable charging, smart protection, and straightforward control—keeping your batteries healthier, longer.