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Xantrex / Trace C-40 40A PWM Charge Controller

Xantrex / Trace C-40 40A PWM Charge Controller
Xantrex / Trace C-40 40A PWM Charge Controller

Home / Shop / Controllers / PWM Charge Controllers

Xantrex / Trace C-40 40A PWM Charge Controller

Model Number: 20-106
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Manufacturer: Xantrex
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Trace / Xantrex
C Series - C35, C40 & C60
Charge Controllers

A Controller for Virtually any DC Charging Source
The C40 has long been the mainstay of our charge controller line-up, its versatility and reliability have made it an industry standard. Now the C40 is joined by two companion controllers, the C35 and C60. All three of these fully solid state, microprocessor-driven controllers are 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.

Standard Features

Silent Microprocessor Control
All C Series controllers (C35, C40 & C60) 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 (C35, C40 & C60) 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 (C35, C40 & C60) 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 (C40) 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.

Model Number


Charge Controller Type


Battery voltage nominal


Maximum charging current

40 A

Maximum open circuit voltage


Typical Efficiency


Load Control

40A (as load controller only)



Equalization Charge


Battery Type

Lead acid (Flooded/gel/AGM)

Class 1 Div 2


Min. operating temperature


Dimensions (l x w x h)

10” x 5” x 2.5”

Weight (Shipping weight)

3.1 lb (3.5 lb)


2 years