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HOME>Charge Controllers
Xantrex- C-40 Charge Controller 12/24/48V 40Amp
Xantrex- C-40 Charge Controller 12/24/48V 40Amp
Xantrex- C-40 Charge Controller 12/24/48V 40Amp
Item Id:RNWC40

Retail Price: $164.99
Your Savings: $41.61
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Xantrex C Series Charge Controller
The C Series, including the C35, C40 and C60, is the benchmark of our charge controller lineup. The C35 and C60 are field configurable for 12 and 24 VDC operation. The C40 may be configured for 12, 24, or 48 VDC operation. All can be used as a charge, diversion, or load controller and come with a standard multi-color charge status LED.

All three of these fully solid state, microprocessor-driven controllers are UL and cUL listed. Whatever the charging source, a C Series controller is sure to meet your DC controller needs.

  • The C Series offers three models, the C35, C40, and C60, that can handle 35,40, and 60 amps of DC current.
  • Silent, pulse width modulated (PWM), high efficiency operation.
  • Three-stage battery charging (bulk, absorption, and float).
  • Automatic overload protection in both active and passive modes.
  • PV array short circuit and reverse polarity protection.
  • Durable construction.
  • Backed by a two year warranty.
  • Microprocessor controlled.

As a Solar Charge Controller

  • When used as a solar charge controller, the C40 can control 12, 24, or 48 VDC array operation and the C35 and C60 can control 12 and 24 VDC array operation.
  • All units offer selectable settings for NiCad, flooded lead acid, gel, or absorbed glass mat batteries.

As a DC load controller

  • As a DC load controller, the C Series has a low voltage disconnect warning system and field adjustable set points that govern automatic low and high voltage disconnect.
  • Manual reset switch for emergency low voltage operation.

As a Diversion Load Controller

  • The C Series automatically directs extra power to a dedicated load such as an electric water heater and ensures batteries are never over-charged.


  • Plug-in remote temperature sensor (BTS) for increased charging precision.
  • Cumulative amp-hour meter (CM) that can be installed on the face of the controller, or remotely (CM/R), up to 100 feet (30 m) away.


Electrical Specifications


Voltage Configurations


12, 24 and 48 VDC


Max. PV Open Circuit Array Voltage


125 VDC


Charging / Load Current (at 25 C)


40 amps DC


Max. Peak current


85 amps


Max. Voltage Drop through Controller


0.30 volts


Typical Operating Consumption


15 ma


Typical Idle Consumption


3 ma


Recommended Breaker Size


50 amps


Recommended Wire Size


#8 AWG


Lead Acid Battery Settings




NiCad Battery Settings




Load Control Mode


Low Voltage Reconnect - Adjustable (sticker provided with unit) all models


Low Voltage Disconnect - User selectable manual or automatic reconnection - includes warning flash before disconnect and provides a one time, user selectable grace period) all models


General Specifications


Specified Temperature Range


32 F to 104 F (0 C to 40 C)


Enclosure Type


Indoor, ventilated, powder coated steel with 3/4" and 1" knockouts


Unit Weight


3.0 lb (1.4 kg)


Shipping Weight


3.5 lb (1.6 kg)


Dimensions (H x W x D)


10 x 5 x 2.5" (25.4 x 12.7 x 6.35 cm)


Shipping Dimensions (H x W x D)


12.4 x 7 x 2.5" (31.5 x 17.8 x 6.4 cm)




Vertical wall mount - indoor only


Altitude - Operating


15,000' (4,572 m)


Altitude - Non-Operating


50,000' (15,240 m)




Two years


Part Numbers


C5, C40, C60 - Controllers


CM - Front Display Panel


CM/R-50, CM/R-100 - Remote Display Panel


BTS - Battery temperature sensor


Features & Options


Regulation Method


Solid stage, three-stage (bulk, absorption, and float), pulse width modulation


Field Adjustable Control Setpoints


Two user adjustable voltage setpoints for control of loads or charging sources - setting retained if battery is disconnected


Display Panel


CM, CM/R-50, or CM/R-100 - optional LCD - backlit, alphanumeric display showing battery voltage, DC amperage, cumulative amp hours, and amp hours since last reset - remote includes 50' (15 m) or 100' (30.5 m) cable


Equalization Charge


User selectable manual or automatic equalization - every 30 days


Battery Temperature Sensor


BTS - optional remote battery temperature sensor for increased charging precision


Regulatory Approvals


UL Listed to UL 1741 - 1999 and to CSA 22.2 No. 107.1-95 Standards, CE compliant

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