Xantrex C-Series
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Xantrex C-Series Controllers are appropriate for small to large sized system.  These controllers can be configured as load controllers. Xantrex C-series controllers come with a two year warranty.

The Xantrex C-12 is ideal for 12 V solar systems up to 12 amps and includes a 12 amp low battery load disconnect. Features include fully adjustable set-points, LVD, and over-current protection.

The C-35 is a simple pulse-width modulation charge controller with adjustable set-points and can be used as a DC load controller as well.

The C-40 and C-60 are appropriate for larger systems, and can be used either as either a charge or load controller. The Xantrex C-40 and C-60  include adjustable set points, over current protection and manual or auto equalize mode. The DVM (Digital Voltage Meter) option adds a digital display of battery voltage, charge current and cumulative amp hours from the solar array. The optional BTS (Battery Temperature Sensor) adds temperature compensation to any of these regulators.









12 / 24



12 / 48 / 48



12 / 24

Xantrex C12 Charge Controller

The C12 charge, lighting, or load controller is uniquely sophisticated. As a charge controller, it features three-stage charging, user definable voltage parameters, and automatic equalization. Standard in the C12s load control circuitry are field adjustable low voltage disconnect and reconnect points, along with a five minute low battery disconnect warning. The C12 also functions as a lighting controller. Lighting run time is adjustable from 2 to 8 hours or can be set from dusk to dawn operation.  An optional battery temperature sensor ensures precise battery charging regardless of battery temperature fluctuations.


Xantrex C35, C40, C60 Charge Controllers

Xantrex Amp Solar Charge Controller may be used for a charge controller or a diversion controller  but may be only used for one of those functions at a time.

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.


Ensures your batteries are always charged Silent, pulse width modulated microprocessor control (maximizing battery life) Field adjustable voltage and battery set points Electronic protection against short-circuit, overload, over temperature and reverse polarity conditions.






Voltage Configurations

12 VDC

24 VDC

12 VDC

24 VDC

48 VDC

12 VDC

24 VDC

Maximum PV Array Open Circuit

55 VDC

55 VDC

125 VDC

125 VDC

125 VDC

55 VDC

55 VDC

Charging/Load Current @ 25C

35 amps DC continuous

40 amps DC continuous

60 amps DC Continuous

Recommended Breaker Size With Recommended Wire Size in Conduit

60 amps DC, #6 AWG

60 amps DC, #6 AWG

60 amps DC
(100% continuous duty cycle),
#6 AWG (90
C rated)

General specifications

Maximum Peak Current
Maximum Voltage Drop
Total Current Consumption
Charge Regulation Method

85 amps intermittently-electronically protected
0.30 volts -charge control mode
While operating - 15 ma (typical), at idle - 3 ma (tare)
Solid state, 3-stage (Bulk, Absorption and Float) Pulse Width Modulation (PWM).

Regulation Adjustment Settings

Charge Control Mode Setup for:

Lead Acid Battery

12 Volt Configuration:
Float 12.5 - 14.5
Bulk 13.0 - 15.0
EQ +1
VDC above Bulk

24 Volt Configuration:
Float 25.0 - 29.0
Bulk 26.0 - 30.0
EQ +2
VDC above Bulk

48 Volt Configuration:
Float 50.0 - 58.0
Bulk 52.0 - 60.0
EQ +4
VDC above Bulk

NiCad Type Battery
VDC above adjustment setting)

Float or Bulk (add 2 VDC)

Float or Bulk (add 4 VDC)

Float or Bulk (add 8 VDC)

Load Control Mode

Low Voltage Reconnect (LVR) - Subtract 1 V (for 12 VDC systems), 2V (for 24 VDC systems), and 4 V (for 48 VDC systems) from the Bulk setting.

Low Voltage Disconnect (LVD) - Subtract 2 V (for 12 VDC systems), 4 V (for 24
VDC systems), and 8V (for 48 VDC systems) from Float setting.

Standard Features

Status Indicator

Multicolor LED indicates the operating/battery voltage status

Low Voltage disconnect
(Load Control Mode)

User selectable manual or automatic reconnection - includes warning flash before disconnect and provides a "grace" period.

Equalization Charge
(Charge Control Mode)

User selectable manual or automatic equalization (every 30 days)

Short Circuit Protection

Fully electronically protected with auto-reset

Field Adjustable Control Setpoints (test points provided for high accruacy)

Two user adjustable voltage setpoints for control of loads or charging sources (settings retained if battery is disconnected)


LCD Meter Panel
(CM, CMR/25 CMR/50, CMR/100)

Back-lit, 2-line, 32 character, alpha numeric liquid crystal display panel for remote (CMR/XX) or front mounting (CM) on the C Series controller. CMR/25 includes 25' (7.5 m) of cable. CMR/50 includes 50' (15 m) of cable, CMR/100 includes 100' (30 m) of cable. Displays: battery voltage, DC amperage, cumulative amp hours, amp hours since last reset.

External Battery Temperature Sensor (BTS/15, BTS/35)

Provides automatic adjustment of the charge control set points to the battery temperature. BTS/15 is supplied with 15' (4.5 m) of cable, BTS/35 cable length is 35' (11 m)


Enclosure Type

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

Specified Temperature Range

32 to 104  F (0 to +40  C)

Allowed Temperature Range

-67 to 167  F (-55 to +75  C)

Altitude Limit (operating)

15,000 feet (5,000 meters)

Altitude Limit (non-operating)

50,000 feet (16,000 meters)

Dimensions (H x W x D)

C35: 8" x 5" x 2.5" (20.3 cm x 12.7 cm x 6.35 cm)
C40, C60: 10" x 5" x 2.5" (25.4 cm x 12.7 cm x 6.35 cm)


Vertical Wall Mount

Weight (Controller only)

C35: 2.5 lbs (1.2 kg), C40: 3.0 lbs (1.4 kg), C60: 3.0 lbs (1.4 kg)

Weight (Shipping)

C35: 3.0 lbs (1.4 kg), C40: 3.5 lbs (1.6 kg), C60: 3.5 lbs (1.6 kg)


UL Listed to UL 1741 and CSA 22.2 107.1-95. CE Compliant,
Designed to CTIK Standards.


All C35, C40 and C60 controllers are warrantied for two years against defects in workmanship and materials.

Optional Accessories:

Temperature Compensation

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.

Xantrex Digital Meter

This is a  digital meter for Xantrex C35, C40, and C60 charge controllers.

CM, CMR/50, 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. If used with a wind turbine, this will only measure voltage.

Xantrex Remote Display (CMR)

The same as the Digital meter but ships with a matching length 100' of cable

Xantrex BTS Battery Temperature Sensor

Xantrex Battery Temperature Sensor (BTS) comes in a 15 ft. (4.5 m) or 35 ft. (11 m) cable with standard telephone type connectors is included and is designed for use with DR and UX Inverters and C Series Charge Controllers. The BTS mounts on a terminal post of a battery in a bank or on the side of a battery and measures its temperature. It sends precise information to the charger or charge controller, which automatically adjusts voltage to ensure full battery charge depending on the ambient temperature of your battery installation. 

For more information on power generating equipment, renewable energy, wind turbines and other off grid systems call 1-888-810-4709 or email info@stratenergy.ca


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Last modified: June 22, 2015