junction boxes

Using a high quality solar panel to power your home is a great way to save money utility bills. As an added bonus you would be having a far less damaging impact on the environment. This is something that more and more people should consider because pretty soon our planet will have crossed the point of no return. At this point it would be more or less impossible to genuinely reverse any of the damage that ended up being done here. Hence, switching to solar power is now more important than ever.

If you want to power your entire home using solar energy, there will probably be several different connections you’d have to make. Junction boxes are crucial in such situations. They can help organize power distribution in your home. They can also prevent wires from being randomly placed across the floor which never looks truly neat. That said, junction boxes come in all shapes and sizes. If you’re finding it difficult to decide which one is right for you, check out our buying guide. This will help you find a solar junction box that suits your needs while falling well within your budget.

Top 5 Best Solar Junction Boxes in 2020

FX Junction Box Waterproof IP68 2 Way Plug Line M20 Coaxial Cable Connector Wire Range 5 to 12mm Outdoor External Electric Power Cord Boxes
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FX Junction Box Waterproof IP68 2 Way Plug Line M20 Coaxial Cable Connector Wire Range 5 to 12mm Outdoor External Electric Power Cord Boxes
  • Junction Box Connector : 2 wire (2-pole) M20 connector, one input and one output ,Cable...
  • Strong waterproof : IP68 high level waterproof class / Moisture-proof/Dust-proof/ anti-UV...

Buying Guide

Number of Diodes

The number of bypass diodes is essential in a solar junction box. A high quality junction box would have multiple diodes that you can utilize. A minimum of two would be required to create a basic power junction, but extra diodes won’t hurt. The best junction box tend to have at least four diodes, and certain high quality products might have up to six. Some might consider six to be overkill but if you truly want to be off grid then you can never have too many. After all, there are going to be several aspects of your home that need power and you don’t want to come up short.

Durability Levels

The durability of a junction box is rated on a pretty easy to understand scale. This scale is the IP ratings chart, and there are a number of different ratings that you can look into. IP stands for Ingress Protection, and there are two numbers in the rating each of which corresponds to a different scale.

The first number is on a scale of 0-6, and it measures how protected the junction box is from contact as well as from the blunt force of solid objects. If the IP rating is, for example, IP06, this means that the solar junction box has no protection from any form of contact, accidental or intentional, nor does it have any protection against blunt force from a solid object. A rating of IP66, for example, indicates that the item is dust tight and fully protected from any form of content whether intentional or otherwise. Solid ingress protection ratings from 1-5 fall between these levels, but usually you don’t want anything less than a 6 on this scale or a 5 at bare minimum otherwise it can risky to use especially if you have kids.

The second number is on a scale from 0-8, and it is associated with how durable the junction box is when faced with liquids. This is slightly less important than the first number in this rating, but it is still important to have a reasonably high rating here. If your product has a rating of IP60, this means that it is dust tight and durable but has no protection against liquids. This kind of rating is rare of course since protection from solid ingress can’t be attained without preventing liquid ingress as well. A rating of IP68, for example, means that your junction box can be immersed in water beyond a depth of 1 meter without causing any internal damage.

Hence, a rating of IP68 is the best that you can get. That said, protection from liquid ingress is less important than solid ingress, so even if you get an IP65 or IP64 this should still work. Just avoid anything whose first number in the rating is lower than 5.

Ease of Assembly

You don’t want something that’ll require power tools to install. Plenty of high quality boxes can be installed without the use of any tools, and these are the ones that you should ideally be getting. The connections can sometimes be tricky since this is electrical work but there are several options out there that have simplified this process to a great extent as well.

Power, Current And Voltage Ratings

All of this will have a pretty serious impact on how much power your solar junction box would be able to handle from your panel. If you have a 300 watt panel, you would need a rated voltage of at least 500V. 1000V voltage ratings are even better since this would make it far less likely that any kind of a short circuit could occur. An ideal rated current would be anywhere between 15A to 25A, but you can also make do with a junction box that has a rated current of around 13A.

Inner Space

A clear sign of a high quality junction box is that it has an adequate amount of space in it. You would need your solar junction box to be spacious enough that all of your cables would fit. Cramped cables can be quite risky and can be less efficient at distributing energy from your junction box so try to get one that has enough room without being too cavernous.

Cables And Connectors

While a solar junction box in and of itself needs to be high quality, you should also be getting a few bonus features such as cables and connectors that come with the junction box. This can help with the setup process for your solar junction box and is a sign that your product comes from a high quality brand.

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