Solar panels can be mounted horizontally, but it is more efficient to have a consecutive block of solar panels installed using the same orientation— either vertical or horizontal.
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This solar panel wiring guide explains different methods and includes practical wiring diagrams and actual examples of ways to design a reliable and efficient solar power system.
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Things to avoid are sharp edges and rough surfaces, overly tight bending radii, overly tight size of cable clips, moving parts of racking systems, direct exposure to sunlight, potential damage by local critters and sagging wires.
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To connect the solar panel to the solar generator, you connect the male MC4 connector on the solar panel cable to the female MC4 connector on the solar generator cable. Do the same with the other male and female connectors.
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