Wiring

controller are strongly recommended. Put a surge protection device on the input line of the C-Series controller between the PV array and the controller.

If the battery, is over 15 feet away from the controller, or if it is routed next to other wiring or sources of power, additional surge protection devices are recommended. Put the surge protection device for this scenario on the battery input line between the battery and the controller.

Over-current Protection

The NEC requires conductors and over-current devices be operated at no more than 80% of their rating. Refer to Table 2-3for a listing of the minimum wire size and over-current device ratings to be used for each model.

As a minimum, a 60-ampDC-ratedcurrent-limiting fuse or circuit breaker should be installed near the battery for protection from short circuits. To meet NEC requirements, use a 60 amp circuit breaker listed for 100% duty for the C60. To meet UL requirements, use #6 AWG copper wires rated for 90 °C (194 °F) for the C60. Over-current protection for the battery circuit is to be provided by others. Refer to Table 2-3for the correct ratings of the fuse and circuit breaker.

Table 2-3Minimum Wire Size

Controller

Minimum Wire Size

Over-Current Device Rating

 

 

 

C35

#8 AWG

45 amps

 

 

 

C40

#8 AWG

50 amps

 

 

 

C60a

#6 AWG (90 °C/194 °F wire)

60 amps (listed 100% duty)

C60

#4 AWGb (75 °C/167 °F wire)

60 amps (listed 100% duty)

 

 

 

a.To meet UL requirements, use #6 AWG, (90 °C/194 °F) wire and a 60 amp Listed 100% duty over-current device for the C60 controller.

b.Not approved by UL for direct connection into the controller. Use a splicer block and #6 AWG (90 °C/194 °F) wire to connect to the controller terminals.

975-0004-01-02 Rev D

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Xantrex Technology C40, C35, C60 owner manual Over-current Protection, 3Minimum Wire Size

C35, C60, C40 specifications

Xantrex Technology is a renowned name in the field of renewable energy solutions, particularly known for its robust line of solar charge controllers. Among its flagship products are the C-Series models: C40, C60, and C35. These charge controllers are specifically designed to optimize the use of solar panels, ensuring efficient energy conversion and battery management for off-grid renewable energy systems.

The C40 model stands out with its impressive 40-amp rating, making it suitable for larger solar installations. It features advanced microprocessor technology, enabling precise control over battery charging and discharging processes. This model supports multiple battery types, including flooded lead-acid, gel, and sealed batteries, allowing users to customize their energy systems according to their specific requirements. One of the key characteristics of the C40 is its easy-to-read LCD display, which provides real-time information on system performance, battery voltage, and charging status.

Moving to the C60, this model offers a higher capacity, rated at 60 amps. The C60 is designed for larger applications, such as RVs, boats, and remote cabins, where higher power requirements are common. It shares many features with the C40 but is equipped with additional capabilities to enhance its versatility. One notable characteristic is the built-in load control, which allows users to manage power distribution to connected devices intelligently. The C60 also incorporates a temperature sensor that adjusts charging parameters according to the battery’s temperature, protecting it from overcharging and extending its lifespan.

The C35, while a bit smaller with a 35-amp rating, is designed to cater to medium-sized applications. It offers similar functionalities as its counterparts, including support for multiple battery types and an intuitive LCD display. The C35 is an ideal solution for homeowners and small businesses looking for reliable performance without the need for extensive power management.

All three models feature a durable design, built to withstand the rigors of outdoor use. With a focus on user-friendly operation, these charge controllers come equipped with straightforward installation processes, making them accessible to both seasoned professionals and newcomers to solar energy. Additionally, their capability to integrate with various solar panel systems makes them a flexible choice for diverse renewable energy applications. With Xantrex’s C-Series charge controllers, users can reap the benefits of solar energy while ensuring their battery systems remain healthy and efficient.