12v Wiring Size Chart. The main issue is the wire size needed for the usually fairly long run to the Solar Panels. 12 24 or 48 volts.
How to Size Wiring for Your System - The Manual Method. A 1V drop from 12V causes 10 times the power loss of 1V drop from 120V. 12 Volt Wiring Gauge Requirements at specific Amps to length for Automotive Electrical Systems Wire uses the measurement of gauge to determine the size of the wire.
This tells you that you could use a cable with a rating of 417A or above however it is good practice not to design a circuit operating at the upper end of the cables rating and so you should select a cable with some additional capacity.
Step 1 - The first step is to decide on the voltage for your system. For motors it is recommended to multiply the nameplate FLA by 125 for wire sizing. The maximum current in a 12 V gauge 6 133 mm 2 cable with length 15 m is approximately 15 amps according the diagram above. Print 12V Cable Length Diagram.
