10 Best Solar Junction Boxes For Solar System

Solar Power is an emerging technology which not only saves your energy bills but has also evolved as an ecological solution to depleting resources. However, choosing the Best Solar Junction Boxes for Solar systems is a stressful and tiring process.

Solar Junction Boxes are crucial for organizing the power distribution when the entire house is powered by solar energy. However, these boxes come in different variants, and you may find it challenging to decide which is the right one for you.

This article will provide you with all the essentials about a Solar Junction Box. In addition, you will learn about how to select the correct junction box for your house and the best solar junction box available in the market today.

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What Is A Solar Junction Box?

What Is A Solar Junction Box?

Solar Junction Box is a protective enclosure used in a Solar System to combine, connect, and terminate electrical components. They are often referred to as a photovoltaic junction box (PV Junction Box) or a module junction box.

The Junction Box encloses wire leads connecting the panel to the string and bypass diodes. It also protects the electrical connections from environmental conditions and helps organize solar power distribution in your home neatly.

What To Know When Buying A Solar Junction Box?

What To Know When Buying A Solar Junction Box?

The Solar Junction box is an essential component in a Solar Power System. It houses all of the electric components and protects them from the outside environment. So, it is crucial to select the correct junction box for your installation.

Any PV junction box dealer will provide you with a wide variety of products. So, as a buyer, it is essential to know what features to look for when purchasing a solar junction box.

Here are the two essential key features you should look for to ensure that you are purchasing the best solar junction box in terms of durability, performance, and price.

Key Feature 1: IP Protection

Ingress protection or IP ratings is the level of protection offered by an electrical enclosure in its working environment against the ingress of solids and liquids.

The letters ‘IP’ followed by two numerals indicate the degree of protection offered by the equipment, where the first number indicates protection against ingress of solids. In contrast, the second indicates protection against the ingress of water.

So, it is essential to select a junction box with a higher IP rating such as IP 65, IP 66, or IP 68 to ensure that the enclosure is moisture and dustproof and provides protection against the external environment.

Key Feature 2: Material

The material should be a key factor to consider when you are selecting a Solar junction box. A good quality material such as PP Plastic, ABS+PVC, etc., provides strength to the enclosure and increases durability.

The junction box is often exposed to the external environment. Therefore, it must be made up of good quality material to withstand high temperatures, UV rays, and other impacts.

Best 10 Solar Junction Boxes & Reviews

Solar Junction BoxesIP ProtectionMaterialPrice
SILIVN 3 Way Junction BoxWaterproof IP 68PP Plastic17.99 $
FX 2 Way Junction BoxWaterproof IP 68PP Plastic8.95 $
La Vane 8 Way Junction BoxWaterproof IP 68ABS + PVC22.99 $
Beauty Star 3 Way Junction BoxWaterproof IP 66ABS + PC13.99 $
Comparison of the best solar junction boxes

Here is a list of 10 Best Solar Junction Boxes we have selected after comparing and reviewing it on various important parameters:

  • Best overall: SILIVN 3 Way Junction Box
  • Amazon choice: FX 2 Way Junction Box
  • La Vane 8 Way Junction Box
  • Beauty Star 3 Way Junction Box 
  • AOSTON 3 Way Junction Box
  • YXQ Junction Box
  • ELifeApply 3 Way Junction Box
  • LeMotech Junction Box
  • YXY 2 Way Junction Box
  • AOSTON 2 Way Junction Box

Now, let us drive straight and look at the review of these Solar Junction Boxes to find out why they could make it in our Top 10 list.

SILIVN 3 Way Junction Box

This is the best quality Solar Junction Box available in the market today and is manufactured by SILVIN. It comes in a pack of 5 boxes with a proven history of safety and durability compared to any other products.

SILIVN 3 Way Junction Box

Specification Overview:

  • Protection: Waterproof IP68 
  • Cable Connections: 2 or 3 Pole
  • Supply Voltage / Amps: 230V/ 17.5A
  • Colour: Black
  • Material: High-quality PP plastic.
  • Suitable for Cable’s diameters: 5.5-10.2mm (ideal for 2.5mm flat T&E cable)

Product Review:

SILIVN 3 Way Junction Box is suitable for a wide range of applications like landscape and outdoor lighting. Applications further include marine or underwater engineering, mining, solar & wind power, underground engineering, and various other equipment.

Lids of junction box have a rubber gasket, and all the openings have cable glands to ensure complete watertight integrity. A reversible screwdriver also accompanies the product for ease of installation.

It comes with all the key features that a junction box should have, from waterproof IP68 protection to high-quality PV material and ease of installation.

SILVIN’s are well known for their moisture and dustproof enclosures, which are safe for interior, garden, and outdoor lighting connectors.

Useful Tip: To ensure long-lasting protection, use appropriate tools to avoid damaging the box’s material and apply grease to all the glands and seals to prevent moisture penetration.

The brand provides users with a safe and reliable solution to various connectivity issues. This product excelled on all our parameters from material to safety and ease of installation to get on top of our list of recommendations.

SILIVN 3 Way Junction Box: Pros and Cons

ProsCons
Comes in a Pack of 5
Waterproof IP 68 protection.
Made of High-Quality Plastic.
Convenient and straightforward installation.
Need to drill a hole to fix it to any structure.
SILIVN 3 Way Junction Box: Pros and Cons

FX 2-Way Junction Box

This is an Amazon’s Choice Product manufactured by FX and is made with high-quality materials that have passed the test of SAA, CE, RoHS, and TUV. In addition, it is well known for its fast and ease of installation.

FX Junction Box Waterproof IP68

Specification Overview:

  • Protection: Waterproof IP68 
  • Cable Connections: 2-way, one input, and one output
  • Supply Voltage / Amps: 450V / 24A
  • Colour: Black
  • Material: PP plastic.
  • Mating connector: 3 x M20
  • Cable Range: 5-9mm or 9-12mm

Product Review:

The FX junction box is a two-way plug line cable connector with a 5-9 mm or 9-12 mm cable range and is best suited for outdoor power cord external sleeve coupler protection.

The strong watertight integrity of IP68, Moisture and Dust proofing, and the anti-UV 2 Way Plastic Terminal makes it suitable for underwater and underground outdoor applications.

The best part of this box is that it is easy to assemble and adjust the hole size to fit the wires perfectly. 

FX is a well-known brand with many positive reviews for its products from the customers underlining the high-quality materials and wide range of applications.

FX 2-Way Junction Box was made on our list of recommendations because of its proven durability, high-quality materials, and popularity amongst the customers. 

FX 2-Way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
Made of High-Quality Plastic.
Anti UV Protection.
Ease of installation
Small size makes the installation of a thicker wire gauge slightly tricky.
FX 2-Way Junction Box: Pro and Cons

La Vane 8 Way Junction Box

This Junction Box is the most unique and multi-utility product designed by La Vane to provide 8 ways cable connections. It uses first-grade ABS + PVC material to make its compression and temperature resistant.

8 Way Electrical Junction Box, La Vane IP68

Specification Overview:

  • Protection: Waterproof IP68 
  • Cable Connections: 8-Way
  • Supply Voltage / Amps: 450V / 24A
  • Material: ABS + PVC
  • Connector Cable Diameter Range: 4-8mm / 8-12mm / 10-14mm

Product Review:

LA Vane 8-Way Junction Box comes with great features like the three different sizes of waterproof rubber rings, which are a good fit for all kinds of cables. It can be connected with screws, making it convenient and easy to use.

The larger inner space makes it suitable for multifunctional applications from indoor to outdoor lighting, external wiring, extension, and connection cable. In addition, it is safe for home, garden, farm, or construction plant.

Apart from its waterproof design, it also has fireproof integrity, dustproof, and anti-impact function, making sure it could be used in any weather conditions.

La Vane has experience of 10 years in production of ABS + PVC materials and has TUV, VDE, and CE approval. Moreover, the brand gained the trust of customers over a long period. 

Useful Tip:  Ensure all the screw connections are in place and tighten properly to maintain water tightness. Do not overtighten the screws; it may damage the rubber gasket of the casing lid.

La Vane 8 Way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
Made of ABS + PVC material.
Wide cable diameter range.
Ease of installation
Price is a little higher.
La Vane 8 Way Junction Box: Pro and Cons

Beauty Star 3 Way Junction Box 

This 3-Way Junction Box by Beauty Star is the best choice for those looking for a large and sturdy product. It comes with a 12 Month Warranty and 100% Money Back Guarantee if you are not satisfied with the product.

Junction Box, Beauty Star Waterproof IP66 Cable Connector

Specification Overview:

  • Protection: Waterproof IP66 
  • Cable Connections: 3-Way with six poles
  • Supply Voltage / Amps: 450V / 32A
  • Colour: Black
  • Material: ABS + PC
  • Mating Connectors: 3*M20
  • Connector Cable Diameter Range:10-14mm

Product Review:

Beauty Star 3-Way Junction Box is considered far safer than other junction box cable connectors due to its TUV, VDE, and CE approval. Bigger inner space of the box makes it very easy to use.

Anti UV design and moisture and dust protection make the product fall into the premium category suitable for different weather conditions.

This junction box can be used for various solar, wind, and underwater applications because of the current rating of 32 Amps and the Cable gland diameter range of 10-14 mm.

Beauty star has impacted the market because of its material quality and guaranteed satisfaction to the customers. In addition, the brand is known for upgrading its quality and complying with safety standards.

Beauty Star 3 Way Junction Box: Pro and Cons

ProsCons
IP 66 protection against water & dust.
Made of ABS + PVC material.
12 months warranty100% money-back guarantee. 
Not suitable for small cable diameter.
Beauty Star 3 Way Junction Box: Pro and Cons

AOSTON 3 Way Junction Box

This is an outdoor waterproof junction box installed horizontally and vertically without any special tools or welding required. The high-quality plastic PC housing doesn’t crack or fade in Sunlight, and the box has long durability.

AOSTON 3 Way Junction Box

Specification Overview:

  • Protection: Waterproof IP68
  • Cable Connections: 3-Way
  • Supply Voltage / Amps: 450V / 24A
  • Colour: Black
  • Material: Plastic
  • Mating Connectors: 3*M20
  • Connector Cable Diameter Range: 4-8mm / 8-12mm / 12-14mm

Product Review:

AOSTON 3 Way Junction box is suitable for the applications where waterproof joints are required, such as LED equipment, grating, external wiring, factory automation control, wireless bridge, etc. In addition, wiring is more convenient and safer with this design.

The package comes with one junction box and a screwdriver. It has a wide cable diameter range and is also corrosion and high temperature resistant.

AOSTON offers a 2-year unlimited warranty over its products with a fast and easy replacement option in case of any issue faced with the product.

The main reason for putting this product on our list is its safety and ease of installation, as there is no need to cut any wire during the installation process.

Useful Tip:  Please disconnect the power supply during installation and secure the box properly before switching on the power.

AOSTON 3 Way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
High durability.
Wide cable diameter range.
2 years warranty.
Size of the box may vary slightly from the description due to manual errors.
AOSTON 3 Way Junction Box: Pro and Cons

YXQ Junction Box

This junction box is made of ABS and Rubber, which provides sturdy protection from moisture, Sunlight, and corrosion. It comes with a provision for 12 holes (3 on each side), allowing the individual to use as per their requirements.

YXQ 255mmx200mmx80mm IP65 Waterproof Junction Box

Specification Overview:

  • Protection: Waterproof IP65
  • Colour: White
  • Material: ABS + Rubber
  • Screw Thread Dia.: 4mm/0.16inch
  • Net Weight: 532g

Product Review:

YXQ Junction Box only requires you to use an ordinary small screwdriver for installation and disassembly. With no cable cutting required, installation and repair are convenient, easy, and safe. 

This box is suitable for wide applications, both indoor and outdoor, including electrical, communications, power stations, fire equipment, construction, oil chemical industry, water treatment, etc. 

The package includes one Waterproof Junction Box, some Rubber Grommets, and some screws.

YXQ offers a wide range of sizes for this junction box. Therefore, you can pick the correct size as per your exact requirements to complete the installation.

YXQ Junction Box: Pro and Cons

ProsCons
Waterproof IP 65 protection.
High durability.
Offers a wide range of sizes.
Lightweight.
Size of the box may vary slightly from the description due to manual errors.
No warranty disclosure.
YXQ Junction Box: Pro and Cons

ELifeApply 3 Way Junction Box

ELifeApply 3 Way Junction Box comprises high-temperature resistant nylon with copper core inner conductors for better abrasion resistance and electronic conductivity.

The Silicone Ring provides perfect water tightness for more security than any other similar product.

ELifeApply 3 Way Junction Box IP68 Waterproof Electrical Junction Box

Specification Overview:

  • Protection: Waterproof IP68
  • Cable Connections: 3-Way
  • Supply Voltage / Amps: 450V / 24A
  • Colour: Black
  • Material: Nylon PA66
  • Connector Cable Diameter Range: 5-8mm

Product Review:

This IP68 Junction Box is a 3-way connector suitable for quick indoor and outdoor lighting and external wiring for your home, garden, farm, or plant. It is also perfect for use in underwater projects and underground professional works.

It supports both Low Power DC & High-Power A/C and is easy to install with no special tool or soldering requirement.

ELifeApply provides a 24-months guarantee on their product and offers to respond and resolve all your concerns within 12 hours. 

This Junction box comes with double protection for cable connectors using four clamping box rubber rings insulation & nuts to provide the strongest sealing & 100% water tightness.

Useful Tip:  Please disconnect the power supply during installation and secure the box properly before switching on the power.

ELifeApply 3 Way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
Rubber ring insulation.
24 months warranty.
Satisfactory resolution in 12 hours.
Somewhat small securing screws are not very convenient.
ELifeApply 3 Way Junction Box: Pro and Cons

LeMotech Junction Box

This is an I65 waterproof junction box with rubber sealing to prevent dust or any dirt from causing damage to internal components.

The package comes in various sizes, making it suitable for indoor and outdoor electrical and communication applications.

LeMotech Waterproof Dustproof IP65 ABS Plastic Junction Box

Specification Overview:

  • Protection: Waterproof IP65
  • Colour: Grey
  • Material: ABS plastic.
  • Net Weight: 276 grams

Product Review:

LeMotech Junction Box is easy to operate and repair with no requirement of cable cutting. The box has a sturdy design for longer service life and damage protection.

The box comes in 6 different variants of IP protection and materials, along with varying sizes for the user to select as per their requirements.

LeMotech is amongst the few suppliers who supply both a 2D CAD model and a PDF with measurements so you can cut and prepare your back panel easily. The files are available for download on Amazon under Technical Specifications.

The package contains the junction box and four screws of 0.16″/4mm, and a gasket for proper sealing. The gasket is stretchable so that you tightly seal the package.

LeMotech Junction Box: Pro and Cons

ProsCons
Waterproof IP 65 protection.
Provided with 2D CAD model and a PDF for measurements.
Available in different sizes
No warranty disclosure.
LeMotech Junction Box: Pro and Cons

YXY 2 Way Junction Box

YXY 2-way junction is relatively safe and reliable, resist vibration, shock, and electromagnetic effects. Moreover, the cable connectors are approved by CE and RoHS, which makes them ideal for use in homes, gardens, and farms.

YXY 2 Way Junction Box

Specification Overview:

  • Protection: Waterproof IP68 
  • Cable Connections: 2 ways
  • Supply Voltage: 230V
  • Colour: Black
  • Material: Nylon PA66
  • Suitable for Cable’s diameters: 4-11mm

Product Review:

This junction box is waterproof with IP68 protection and can be continuously immersed in water under certain pressure. It is a 2-way external Junction Box suitable for 4-11 mm cable diameter.

It is made of high-quality nylon PA66 material and brass connectors which protect Sunlight, corrosion, and high temperature.

XYX offers friendly pre-sale and after-sale customer service for its products, making the brand popular amongst its customers.

The product comes in a pack of 5 connectors and is suitable for fast connection. It can be widely used for underfloor heating, outdoor lighting, and external wiring.

XYX 2 way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
Fast and simple connection
Pre and post-sale customer support
No warranty disclosure.
XYX 2 way Junction Box: Pro and Cons

AOSTON 2 Way Junction Box

This is another Amazon’s choice 2 way waterproof IP68 external junction Box suitable for  M20 Coaxial Cable Connector with a wide range of 5 to 15mm for outdoor external wiring.

AOSTON 2 Way Junction Box

Specification Overview:

  • Protection: Waterproof IP68 
  • Cable Connections: 2-way
  • Supply Voltage / Amps: 450V / 24A
  • Colour: Black
  • Material: Plastic.
  • Cable Range: 4-9mm or 9-15mm

Product Review:

The junction box is made of high-quality plastic, which does not crack or fade in Sunlight and is apt for long-duration use. Moreover, it is considered a fast connector as you only need to connect the same type of wire.

The product comes in a package of 2 with a complimentary screwdriver for easy installation.

The Junction Box is good for use in places where waterproof joints are essential, such as LED equipment, external wiring, automation control, etc.

AOSTON provides a 2-year unlimited warranty on its products, as well as a quick and simple replacement option in the event of trouble with its products.

AOSTON 2 Way Junction Box: Pro and Cons

ProsCons
Waterproof IP 68 protection.
2 years warranty.
Size of the box may vary slightly from the description due to manual errors.
AOSTON 2 Way Junction Box: Pro and Cons

Tool Kit For Solar Junction Box

Now that you are familiar with the key features to look for in a Solar Junction Box and the best products available on the market let me further assist you with a tool kit that you will require for the installation of any Solar equipment.

It is essential to have a Tool kit while using Solar equipment for easy and accurate installation. BougeRV Solar Crimper Tool Kit is Amazon’s choice product specially designed for Solar Installation.

This is a reasonable, lightweight, and portable Tool Kit with a logical structure. It contains pair of wire crimper, solar panel connectors, and a solar connector spanner. 

The product is highly recommended by customers because of its design, portability, and work accuracy.

Are There Solar Junction Box Alternatives

Are There Solar Junction Box Alternatives

Solar Junction box is an essential part of the solar distribution system and needs very high prison. It is not advisable to opt-out of this component for a well-designed system.

There are very few available alternatives that can be used to replace junction boxes in some special cases. Quickwireto install is one such time-saving alternative designed for quick screwless installation.

Another alternative that can be used at certain places instead of a junction box is NEC-approved Cable Splice Kits.

Some FAQs 

What can I use for a junction box?

It is not recommended to use any alternative for a solar junction box in a well-designed system. However, you can use some NEC-approved alternatives like Quickwire or Cable Splice kits at certain places.

How do you open a solar panel junction box?

Most of the Solar Panel Junction Box have screws to open the box. Some box designs have hinges for opening.

What does a solar combiner box do?

A solar combiner box is a device that combines the output of many PV module strings and connects it to the inverter. It is commonly used in bigger commercial and utility-scale PV power installations (greater than 500kW).

Is a Junction Box Necessary?

Yes. Junction boxes protect the connections from the outside environment, accidental damages, and short circuits.

Final Thoughts 

The Solar Junction Boxes mentioned in this article have been tested, reviewed, and approved by many customers who have purchased the items and were pleased to refer the products to others.

SILIVN 3 Way Junction Box is made on the top of our list because of the material quality, safety features, and ease of installation. Moreover, the brand has earned the trust of several customers since its inception. 

Hopefully, this article helped you to learn some basics about Solar Junction Boxes and what key features to look for while purchasing them. Then, you can check the review and follow the list provided here before your next purchase.

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