Adding a fourth panel

[bLEEp]

Currently I have three, 100 watt renogy eclipse panels on my roof.
I am wondering what parts I need to buy to add a fourth panel.
Like splitters and what not.
Currently I have my positive and negative going to a threee way splinter to connect to my three panels.
Could I add a two wayspliter at each positive and negative lead, one going to the three way and one going to the fourth panel?
Thanks in advance everyone.
bLEEp out

 

[John61CT]

What controller, what are its rated V and A capacities?

Are the current three in series or paralleled?

What gauge wiring and how long a distance?

Are you using MC4 connectors? What amp capacity?

 

[bLEEp]

I have the commander controller, easily can handle the fourth panel.
All factory MC cables.
The bLEEps