Keep the distance between panels and controller below 15 meters where possible. For longer runs, upgrade to 48V systems and use 10mm² or 16mm² copper cable. Always aim for less than 3% voltage drop. Cable Size and Type The size and type of cable used to connect solar panels to the charge controller can affect the distance between them. That's why choosing the right cable size and understanding maximum distance limitations are essential to ensuring your. . The ideal location for my solar 'stack' (MPPT, inverter, batteries) is in the tac room, (walled off, dry room for gear and storage). This is on the north side of the barn.
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