Battery Fuse for Solar/Charger System
From the new solar/charger system was planning to run 6ga + and - wires right to the battery terminals, not tied in anywhere to the existing trailer wiring. Was thinking about using a Blue Sea 519...
Forum Discussion
Almot wrote:
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Rogue 3048 accepts max #4 wire, but in his case I would use #2. Or - a short run of #4 to the Pos bus near controller or to controller breaker, and then #2 to battery.
Rogue says to keep the voltage drop to less than 2%, but it also has voltage sense wires, that I intend to use.
Maybe I'm doing the calculations wrong. Rogue says #6 wire has a resistance of 0.00040 ohm/ft, so 20' (MAX) is 0.008 ohms. The MAX current I will get out of a 390W array via the Rogue is 27A at 14.4V, less if only 90% efficiency: say 25A. Then the Voltage drop is 25*0.008 = 0.20V, which is only 1.3% of 14.4V
Where am I going wrong on this?
Now the same cables will also be used for the PD9260 which can pump out up to 60A to a deeply discharged battery. So the voltage drop will be greater there, but I don't really care. We'll be on shore power then; there's no plans for a generator.
And these cables will not be used for any loads at all. Those are separate and remain what the trailer came with.
