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Schneider Electric RNWC40 > 40 Amp 12/24/48 Volt PWM Charge Controller
Schneider Electric RNWC40 > 40 Amp 12/24/48 Volt PWM Charge Controller

Our Price: $159.00
Warranty: 2 Years


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Description Datasheet

Schneider Electric 40 Amp 12/24/48 Volt PWM Charge Controller

Manufacturer Part Number: RNWC40

The Xantex C40 is a fully solid state, microprocessor-driven controllers that is UL and cUL listed. The C Series, Xantrex C40 charge controller may be configured for 12, 24, or 48 VDC operation. It can be used as a battery charge, DC load control or DC diversion operation and comes with a standard multi-color charge status LED.


  • 12 A for 12 V batteries (Xantrex C12 PMW)
  • 35, 40 and 60 A for 12, 24 and 48 V batteries (48 V only Xantrex C40 PMW)
  • Silent, pulse width modulated (PWM), high effi ciency operation
  • Electronic protection against short-circuit, overload, over-temperature and reverse polarity conditions
  • Automatic overload protection in both active and passive models
  • Easy to read, front panel status LED
  • Durable construction
  • Field adjustable voltage and battery set points
  • Can control lights (Xantrex C12 PMW)
  • Optional operation as diversion load controller (Xantrex C35, C40, C60 PMW)


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 Adjustable
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 300 lb (1.4 kg)
Dimensions (H x W x D) 10.0 x 5.0 x 2.5" (25.4 x 12.7 x 6.35 cm)
Shipping Weight 3.5 lb (1.6 kg)
Shipping Dimensions (H x W x D) 12.4" x 7" x 2.5" (31.5 x 17.8 x 6.4 cm)
Mounting Vertical wall mount - indoor only
Altitude - Operating 15,000' (4,572 m)
Altitude - Non-Operating 50,000' (15,240 m)
Warranty Two years


  • Display Panel: CM, CMR/50 or CMR/100-A back-lit meter which continuously displays: battery voltage, DC amperage, cumulative amp hours and amp hours since last reset. CM mounts on front of C Series, C35, C40 and C60, charge controllers. The remote meters CMR/50 and CMR/100 use simple telephone type plug-in connectors. 50 ft. (15 m) or 100 ft. (30 m) cable included.
  • Battery Temperature Sensor: BTS/15 or BTS/35 Monitors battery temperature and adjusts charging voltage for maximum performance. A 15 ft. (4.5 m) or 35 ft. (11 m) cable with standard telephone type connectors is included.

Detailed Description

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.

PWM Charge Performance

C Series controllers all use Pulse Width Modulation (PWM) charging profiles which are designed to provide a full charge to your battery while, at the same time, minimize gassing which can shorten battery life.

3-Stage Battery Charging

All C Series controllers automatically initiate a 3-stage battery charging cycle. Bulk, Absorption, and Float modes are used to ensure that voltage and current settings accurately match the batteries' actual state of charge. This means fast-as-possible charging and extended battery life. An auto equalize mode can be easily switched off when the controller is used with sealed batteries. C Series controllers are factory set for solar PV battery charging operation.

Field Adjustable

There are a number of field configurable, user adjustments for C Series controllers. C35 and C60's can only be set for 12 or 24 VDC operation. The C40 may be configured for 12, 24 or 48 volt systems. Bulk and Float voltage set points are user adjustable which allows use with a wide variety of battery technologies including; flooded lead acid, gel, and absorbed glass mat. In addition, there are manually selectable settings for Nicad batteries.

DC Load Controller Mode

When used as a load controller, the C Series will automatically turn a DC load on or off at predetermined battery voltage settings. Both LVD (low voltage disconnect) and LVR (low voltage reconnect) set points are user adjustable.

DC Diversion Mode

In this mode, all power, which is not used to maintain a full charge on the batteries, is diverted to a load dump such as water or space heaters. Diversion mode is used to regulate microhydro and wind turbine systems which need a constant load.

LED Status Indicator

A simple to read, multi-color LED indicates operating status and is standard on all C Series controllers.

UL and cUL Listed

C Series controllers are listed by UL to exacting UL 1741 and cUL CSA 22.2 107.1-95 standards. C Series controllers are also CE compliant (European countries) and are designed to CTIK standards (Australia). Their current ratings are "real world" and do not have to be derated to comply with USA NEC 125% over-current requirements.

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