How to install a solar junction box

How to install a solar junction box

The solar junction box is essential because it connects your solar panel to the outside world and protects your connections from outside the solar panel. Its second purpose is to give you an easy way to connect and disconnect solar panels for maintenance or repair or create a series of solar panels (solar arrays) together. Additionally, it adds an overall professional look to the entire panel.

Before installation, you need to prepare the following things:
·Solar panel junction box
· Electric Drill
· Drill
· Soldering iron
· Solder
· ½ inch wood screws
· Transparent silicone
· Glue gun
A note about junction boxes: They come in all shapes and sizes. I would find a junction box with blocking diodes already installed in it. This is to prevent the backflow of current. For your solar panel, you can get a small junction box that's wide enough to completely cover the two holes you drilled in the frame and where your bus is currently coming out.

Now that you're all set let's start organizing your solar panels.

Start with your bus and make a quick note of which is positive and negative. It's even a good idea to tag them if you can.

Many junction boxes come with wires and leads already connected, and I recommend trying to find these on our website .

The junction box is placed over the hole on the back of the panel where you routed the bus wires out of the solar panel in the previous steps.

If you remember, in the first step, we drilled two holes in the frame. Later we put both the positive and negative busbars through these holes.

Flip the solar panel and place the junction box directly over these holes.

Many junction boxes come with wires and leads already installed, which is what I recommend you buy.

Most junction boxes allow you to easily slide the bus wires out of the solar panel inside the junction box slot. Once the bus wire is slid in, it is best to solder the bus wire to the junction box leads.

All junction boxes share the same basic concept of connecting them and mounting them on a solar panel. This is an overview of what is required to install the junction box. Of course, I don't know what junction box you bought or its design. So this has to be generic to cover most boxes. If you need help with a specific junction box, the supplier is an excellent place to ask questions.

After connecting the positive and negative busses to the junction box, use a handy multimeter to connect the wires to the junction box leads to make sure you're receiving the correct voltage.

Make sure the junction box completely covers the two holes in the frame.

Next, find a spot inside the junction box, usually drill two holes in the center, where you can pre-drill two holes and screw the junction box down to the frame.
The junction box should be strong enough to not move on the frame.

The location of the positive and negative busses in the junction box should be pretty obvious. Again, this process may vary depending on which junction box you buy, but you want to make sure the bus is connected to the correct terminals.

Add silicone beads around the bottom of the junction box to flush with the frame.

Once the bus is connected and the silicone around the bottom of the frame dries, place the cover on the junction box and screw it on.

Next, flip the whole solar panel over, put it in the sun, and check the voltage output.
I think you should now have a fully finished and working the solar panel.

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