Our solar cable assembly designs are premium grade
that help you save time, cut risks, and keep
installations running smoothly. These assemblies
bring order and ease to wiring jobs.
MC4 connections are the industry standard for solar
cable assembly for solar panels. Using them makes it
easy and safe to connect wires. Every junction has a
weather seal that keeps water out. This stops dust
and rain from getting into the circuits. There is a
locking MC4 plug on each end of the cable. It can be
male or female. When you click on them, they make a
strong connection. In hot, sunny places, MC4 parts
can safely carry large amounts of electricity. They
can be used outside for a long time because they are
resistant to weather and UV light. This makes MC4
perfect for use in solar panel arrays. Our solar
cable assemblies are as safe as they can be because
they have certified MC4 connections. We promise that
your project will be more reliable and of higher
quality.
As a leading solar cable assembly manufacturer, we can
create cables that are just right for you. We can make a
harness with the right connection, length, or split for
you. Our staff carefully makes each custom cable so that
it is easy to install. This will help you save time and
make the site safer. Every assembly goes through quality
and safety testing. We are one of the best OEM solar
cable assembly manufacturers for large orders. You can
trust our expertise to make harnesses that are perfect
for your project and ready to use.
Overmolding splitter
An overmolding splitter is a solid block of
plastic that connects several cable branches.
When molded over the cable junctions, it makes
them stronger and keeps water out. Using this
method, you can safely split one input wire into
several outputs. The exposed wires meet inside
the mold, which keeps dust and water out. You
won't have to worry about any of the overmolded
connectors bending or breaking. It keeps the
cables from getting tangled and frayed at the
ends. This product is very easy to install
because it has a built-in split design. Every
branch already has MC4 connections, so it's
ready to be plugged in. We test every overmolded
splitter to make sure it will last and work well
for a long time.
OEM 2in1 3in1 4 5 6 7 8 in one cable
We make cable assemblies with multiple outputs
that take one input and multiply it by two,
three, or even eight. Most branch harnesses come
with either 2-in-1 or 8-in-1 options. Connectors
at the ends of each branch make it possible to
connect individual panel lines. This means that
there is less need for extra splices or on-site
combiner boxes. Using our OEM multi-output
cables to make wiring solar arrays easier could
save you time and effort. All of the branches
are clearly marked, and the split joints are
shaped to be strong. We use only the best
materials to keep each branch insulated and
strong. These harnesses are a hot-selling solar
cable assembly component for multi-panel
configurations.
Appropriate wire size for different ampere
When picking out solar cables, the wire gauge is
the most important thing to think about. Wires
with thicker walls may be able to handle more
amps of current without getting too hot.Use
thinner wires (AWG 18/AWG 16) for small systems
under 10 amps. Medium arrays need AWG 14/AWG 12
for 20–30 amps. AWG 10+ cables suit high-power
systems over 30 amps.Our cable strands are made
of thin copper, which lets them carry current
well. The insulation on each gauge is made to
keep it safe at its rated amps. For the best
performance and safety, we make sure that the
cable gauge is the same as the amp load. This
stops the cable from getting too hot and stops
voltage loss.
We can help with all of your solar cable assembly needs.
We do everything in-house, from design to testing. We
can make sure that every cable is made perfectly by
centralizing the process. We can make either standard
cables or custom harnesses, depending on what you need.
Every assembly is made in a way that meets safety
standards like UL and TUV. We have the kind of cable or
connection you need right now. Our experts can help you
find the right lengths and parts for your system. We
ship solar cables in small and large batches with care
and reliability. We also have separate walls for solar
cables.
Dual wall for solar cable
Dual-wall solar cable adds another layer of
protection. The inner jacket protects the
fragile copper strands from heat and moisture.
The outer coat protects the material from the
sun and rain and makes it stronger. The wire can
handle heat, rain, and snow because it has two
layers of protection. It keeps wires from
bending or rubbing against things, which can
cause cuts or scrapes. The result is a cable
life that lasts, even in bad weather. Our
dual-wall cables also pass fire safety tests for
wires. We use high-quality fabrics to make sure
the jackets last a long time and are still
flexible. Your solar system is now safer and
more reliable because of these extra safety
features.
With multiple or flying leads, you can make
personalized cable ends for B-side direct
connections. One side of a harness might have a
lot of MC4 connections, while the other side
might have wires that are open, which are
sometimes called flying leads. The ends of
flying leads are cut and stripped so that they
can connect to your equipment or combiner box.
These leads are often labeled and color-coded to
make it easier to connect them. We make sure
that the insulation and size of each exposed end
are enough for the current that needs to go
through it. This lets the panel side have a lot
of connections on one wire run, and the B-side
equipment can have free ends.
Accurate crimping is important for making many
solar cable assemblies. Precision crimp machines
connect the copper contacts in the MC4
connections. Each strong and consistent crimp
makes sure that the connection is safe. Proper
crimping makes the junction highly conductive
and keeps it from getting hot. We check each
crimp with sensors or by looking at it to make
sure it is of good quality. This method of mass
production makes it possible to put things
together faster without losing quality. Our
experts always know how to crimp. A strong
partnership forms in the field that lasts for
many years.
We use top-quality materials in every solar cable
assembly we build. The copper wire strands are thick and
well-plated to carry power efficiently. Premium rubber
or plastic insulation keeps them safe from heat and
weather. Connector shells are made of strong,
UV-resistant resin for outdoor use. This mix of durable
materials means long life and secure operation. Our
assemblies meet industry standards, utilizing materials
chosen explicitly for solar use.
Silicone wire strands copper
Our solar cables use fine copper strands at their
core for excellent conductivity. These strands are
wrapped in silicone insulation that remains flexible
in both heat and cold. Silicone rubber is durable
and resists cracking over the years in the sun. The
flexibility of silicone cable lets you route wires
through tight spaces easily. It also protects
against moisture and UV rays in outdoor climates. We
select the copper grade and strand count to match
the current needs of each cable size. The result is
a cable that carries current well and lasts a long
time. Silicone insulation also meets fire safety
standards for solar installations. Combined with
tinned copper plating, our wires resist corrosion
from air and moisture.
Plastic resin enviremental
The connector shells and splitters are made from
high-quality plastic resin. This material is
UV-resistant and weatherproof, making it suitable
for outdoor use. Our resin is free of harmful
substances (RoHS compliant) for safety. It stays
strong from -40°C to +90°C without cracking or
deforming. We choose plastic types that resist acid,
alkali, and salt spray. These properties keep the
connectors safe under harsh conditions. Each plastic
housing is molded precisely to ensure a tight fit
with the cable. The result is a durable,
eco-friendly shell that seals the wiring. Using
premium resin helps the whole assembly pass strict
tests. This means a longer lifespan and fewer
maintenance needs for your solar system.
Certified MC4 male and female & Splitter
Every one of our assemblies uses approved MC4 male
and female connections. Every connection meets the
safety standards set by different industries. Both
the male plug and the female socket have a lock that
is built in. You won't accidentally undo these
because they snap into place. These approved parts
will make sure that your solar connections are safe
and reliable. Our splitters use the approved
connectors on all of their branch outputs. This
consistency will make sure that the whole harness
follows all the rules. It is also impossible to
miswire an MC4 because there is only one way to
install it. There is a high-quality seal on each
connector that keeps dust and water out.
Thick Tin plated copper contact
Our solar cables have strong, tin-plated copper
contacts inside the connectors. The copper core's
great conductivity makes the power flow much better.
Tin plating protects the contact from corrosion
caused by moisture. This also protects the metal
surfaces from rusting. This means that the
electrical contact will stay strong even after being
outside for a long time. The thick coating on the
connector pins will help them last longer. Better
contact leads to less resistance and power loss.
Before leaving our facility, we test the quality and
thickness of every single one of our contacts. To
make sure your solar cable assembly lasts. With
these contacts and the strong MC4 connections, you
can be sure that system will work well.
Industries and Applications
Residential Solar Power Systems
Solar cable assembly plays a critical role in
residential solar power systems by ensuring safe
and efficient power transmission between solar
panels, inverters, charge controllers, and
battery units. These cable assemblies are
designed to be UV-resistant, weatherproof, and
heat-resistant, making them suitable for rooftop
installations. Proper insulation and
custom-length assemblies help minimize power
loss, improve system reliability, and support
long-term performance in residential solar
environments.
Commercial Solar Installations
In commercial solar installations, solar cable
assemblies are widely used in office buildings,
shopping malls, hospitals, and educational
facilities. These systems require cables capable
of handling higher voltage levels and longer
cable runs. High-quality solar cable assemblies
improve electrical safety, reduce overheating
risks, and maintain stable energy flow under
continuous load. Professionally engineered
assemblies also help maximize system efficiency
and reduce long-term maintenance requirements.
Industrial Solar Projects
Industrial solar projects rely on robust solar
cable assemblies to operate efficiently in
demanding environments such as factories,
manufacturing plants, and processing facilities.
These environments expose cables to high
temperatures, dust, vibration, and continuous
operation. Solar cable assemblies used in
industrial settings are built with
flame-retardant insulation, strong connectors,
and durable materials to ensure uninterrupted
power delivery and long-term operational
reliability.
Utility-Scale Solar Power Plants
Utility-scale solar power plants use solar cable
assemblies to connect large numbers of solar
panel strings, combiner boxes, and central
inverters. These installations require
long-distance power transmission with minimal
energy loss and high reliability.
Custom-engineered solar cable assemblies are
designed to meet international standards,
support grid-level performance, and withstand
harsh outdoor conditions while ensuring stable
and efficient power flow across large solar
farms.
Renewable Energy & Hybrid Power Systems
Solar cable assemblies are essential components
in renewable energy and hybrid power systems,
including solar-wind and solar-diesel hybrid
configurations. These systems require flexible
and highly insulated cable assemblies to manage
power from multiple energy sources. Properly
designed solar cable assemblies support safe
power switching, stable voltage control, and
long-term durability, helping hybrid systems
operate efficiently in both on-grid and off-grid
applications.
Energy Storage & Battery Systems (BESS)
In energy storage and battery energy storage
systems (BESS), solar cable assemblies connect
solar panels, inverters, and battery banks to
manage high current flow during charging and
discharging cycles. These assemblies must meet
strict safety and performance requirements.
Heat-resistant insulation, secure connectors,
and precise assembly help improve system
efficiency, enhance battery lifespan, and ensure
reliable operation of modern energy storage
solutions.
Voltage-Rated Solar Cable Assemblies
We rate our cable assemblies based on the voltages that
modern solar systems use. Many older or smaller PV
arrays use cables that can handle 600V or 1,000V. New
utility-scale projects often run at 1,500V to be more
efficient. We have cables that are safe to use with all
of these common DC voltages. It is very important to
choose the right voltage rating for both safety and
efficiency. We can make assemblies for common PV
voltages, such as:
600V DC
Suitable for small and residential PV systems.
1000V DC
Common in many commercial and residential
installations.
1500V DC
Used in modern utility-scale and high-power solar
projects.
We rate our cable assemblies based on the voltages that
modern solar systems use. Many older or smaller PV
arrays use cables that can handle 600V or 1,000V. New
utility-scale projects often run at 1,500V to be more
efficient. We have cables that are safe to use with all
of these common DC voltages. It is very important to
choose the right voltage rating for both safety and
efficiency. We can make assemblies for common PV
voltages, such as:
Cable length and gauge
You can change both the wire gauge and the
length of the cable. We can meet all of your
wire-cutting needs. If you need it for longer
lines or more amperage, all you have to do is
ask for bigger gauge wire.
Connector and lead types
Choose the type of connection you want (like MC4
or MC3) and how many leads you need. We can give
you a flying lead, which is the end of the
cable. We can also make a special connector to
fit your machinery on one end or both.
Branching and splitters
We have a wide range of splitters and branches
to choose from, such as 2-in-1 to 8-in-1
branches and custom split junctions. With the
many branch options, you can connect multiple
outputs or panels in parallel with just one
harness.
Color and marking
It's easy to tell wires apart if they have
printed labels or jackets that are different
colors. You can also choose color-coding or make
your own marks to fit the needs of your project.
Packaging and branding
We can package your cables in bulk or one at a
time, and if you want, we can put your logo and
labels on them. You can ask for custom packaging
if you are an OEM customer.
Quantity and delivery
We can handle both single orders for prototypes
and ongoing orders for mass production. We keep
factory stock and make things quickly, so you
can be sure you'll get your cables quickly, no
matter how many you order.
Giving neat, safe, and easy-to-use harnesses, we help
save time, cut risks, and keep machines running
smoothly. Our harnesses bring order, safety, and ease to
wiring jobs, making them the wise choice for projects
big or small.
People who want to buy solar cable assemblies should
choose QL-Custom Technology Ltd. You can rely on us
to be your go-to solar cable assembly supplier
worldwide. Our state-of-the-art Chinese facilities
can be found among the best Chinese solar cable
assembly factories. We work with clients all over
the world, including cable assembly houses in the US
that work on solar projects of all sizes. We promise
reliable products and fast shipping because we are
ISO certified and have strict quality control
measures in place. Contact QL-bespoke Technology
Ltd. if you need a custom solar harness and would
like help from someone with experience the whole
time.
My solar panel setup was much easier
with these cable assemblies. The
connectors are sturdy, and the wires are
very flexible. Even after rain,
everything stayed dry and secure. Very
happy with the quality!
Emily Johnson
Ordered a large batch for our factory;
they delivered on time. The wires and
connectors were exactly as specified.
Our production line got them running
smoothly. Very professional and reliable
supplier!
James Wang
Our office building uses these
assemblies and they have been rock
solid. The MC4 connectors fit snugly and
the extra splits made wiring quick. No
downtime so far. Great quality and
support!
Karen Patel
Buying from QL-Custom was easy and
worry-free. The harnesses arrived
quickly and worked as promised. The
cable labeling saved me setup time. I'll
definitely buy more for future projects.
