Solar DC Cable

Planning the best solar array configuration for your PV system

Planning your solar array configuration can help you ensure the correct voltage/current output from your PV system. In this section, we explain what these items mean and why they are important.

Maximum DC Input Voltage

For safety reasons, NEC regulations and to match the technical specifications of the string inverter, the maximum DC voltage must be limited. Residential PV systems are limited to 600V as required by NEC regulations, but this may vary depending on the central inverter.

Minimum DC Input Voltage

A minimum DC input voltage is required to start up a string inverter, which is why this is an important planning configuration for PV systems. This number varies greatly depending on the model and brand chosen.

Maximum DC Input Current

The inverter's technical specifications impose a limit on the maximum DC input current, which is determined based on the current-voltage curve (IV-Curve) for solar cells. It's crucial to keep this in mind during solar panel wiring, as exceeding the inverter's maximum input current could compromise the system's integrity.

Number of MPPT Trackers

MPPT trackers are designed to enhance PV systems' power output, taking into account the IV-Curve. Centralized inverters equipped with multiple MPPT trackers can efficiently maximize the power output from solar panel strings that have varying specifications. This allows for the wiring of more intricate solar arrays to the inverter. Therefore, if your inverter boasts two or more MPPT inputs, it's essential to utilize them optimally, especially in scenarios involving diverse orientations or shading effects.

Wiring your solar panel array: Step-by-step guide

Up to this point, you learned about the key concepts and planning aspects to consider before wiring solar panels. Now, in this section, we provide you with a step-by-step guide on how to wire solar panels.

Connecting a PV connector to your PV wire

Solar panels typically have MC4 connectors preinstalled, facilitating the interconnection between panels. At the system's endpoints, you can utilize MC4 extension cables, available in various lengths, to bridge the gap between the PV system and the inverter.

Nonetheless, understanding the proper installation of PV connectors remains crucial. In certain scenarios, such as when an MC4 extension cable of the desired length is unavailable, you may need to make the connection manually. It's essential to be prepared and know how to accomplish this task independently.

The steps to add solar connectors to PV wires are the following:

1. Strip off the insulation from the wire to expose the inner conductor.

2. Position the connecting plate onto the stripped wire segment.

3. Utilize the crimping tool to securely crimp the connecting plate onto the wire.

4. Begin with the lower assembly parts: install the terminal cover, strain reliever, and compression sleeve onto the wire and connector.

5. Next, install the upper components: place the safety foil, male or female MC4 connector housing, and the O-ring in their respective positions.

6. Hand-tighten all the components together to ensure they are initially secured.

7. For a secure and final assembly, use the solar connector assembly tool to apply the recommended torque to the MC4 connector.

DAYA Solar DC Cable Details

DAYA Solar DC Cable Working conditions

PV Advantages

PV modules function in extreme temperatures and endure diverse environmental conditions. As per the NEC, various PV array applications are limited to USE-2 or PV wire. These cables must adhere to the necessary sunlight resistance and temperature ratings for their respective environments.

PV wires are specifically designed for photovoltaic applications, while USE-2 cables are typically intended for underground service entrance use. Both cable types commonly feature XLPE insulation and can be sunlight resistant and/or suitable for direct burial.

However, PV wire differs from USE-2 wire in terms of insulation thickness, voltage ratings, and operating temperatures. PV wire boasts thicker insulation layers to safeguard against harsh environments. USE-2 cables are rated up to 600 V, whereas PV wire comes in three voltage ratings: 600 V, 1 kV, and 2 kV. USE-2 cables have a maximum operating temperature of 90ºC, while PV wire can be rated for higher temperatures.

Notably, PV wire is among the limited single-conductor wire types that can exceed 600 V and be directly buried according to the NEC, without the need for additional shielding.

Packing:

--100m/Coil with Shrinking Film Wrap, 6 Coils per outer carton.

--100m/Spool, spool can be Paper, Plastic, or ABS, then 3-4 spools per carton,

--200m or 250m per Drum, two drums per carton,

--305m/Wooden Drum, one drum per outer carton or pallet loading,

--500m/Wooden Drum, one drum per outer carton or pallet loading,

--1000m or 3000m wooden drum, then pallet loading.

*We can also offer customized OEM packing according to clients' request.

Delivery:

Port: Tianjin, or other ports as per your requirements.

Sea freight: FOB/C&F/CIF quotation are all available.

*For some countries such as Africa countries, middle east countries, our sea freight quotation is much cheaper than clients get from local shipping agency.

DAYA Solar DC Cable Parameter (Specification)

DAYA Solar DC Cable Service

Pre-sales

We provide technical support and complete power distribution solutions tailored to your needs. If the design drawings you provide are deemed unfeasible, we will optimize the plan and adjust it with the dimensions of the cabinet, the location of the equipment, and so on. We will also optimize the configuration of the products to make them meet your requirements.

After-Sales

If any problem occurs, we will first provide support by phone or email. We will perform a remote debug if necessary. Furthermore, our products come with a troubleshooting manual for reference when trying to find the fault and solve issues by yourself. Most problems can be solved by the above-mentioned methods. We will check in every year or so to acquire detailed information about your equipment to get a better understanding of the inner workings.

Our customer service promise

1. We will quickly solve the problem after receiving the issue report or repair request.

2. We then explain the cause of failure in detail and any fees will be charged according to market pricing.

3. If we take any parts back for inspecting, we will apply fragile notice stickers on them or write their serial number down to maintain the safety of the parts.

4. If your complaint is deemed valid, we will refund repair fees to you on-site.

DAYA Solar DC Cable FAQ

1.Q: Are you a manufacturer or trader?

A:We are all, Main business of the company low-voltage switchgear, power distribution cabinet, explosion-proof cabinet design, production and system programming.

2.Q: Whether to support OEM/ODM?Can you design the equipment according to our size?

A: Of course, we can customize any product according to customer requirements, and we can provide design solutions and solutions.

3.Q: Why should I buy from you instead of someone else?

A: First of all, we can provide all customers with very professional support consisting of IT consultants and service teams.Secondly, our main engineers have more than 20 years of experience in power distribution equipment development.

4.Q:What about the delivery time?

A:Generally, our delivery time is around 7-15 days about. While, it depends on the requirement of customers and the

quantity of products.

5.Q:What about the shipment?

A:We can arrange shipment by DHL, FedEx, UPS,etc.of course, customers can also use their own freight forwarders.

6.Q:How about the terms of payment?

A:Supported T/T、Paypal、Apple Pay、Google Pay、Western Union,etc. Of course we can discuss on this.