I'm working on building a Tesla battery powered off-grid system in our Airstream 22FB Sport. The idea is to be able to run the 120V AC system from the 5.2KV Tesla battery which is with the existing 12V Battery system not possible.
I'm now very confused about the correct wire sizing for the 24V side of the system. With this calculator and the following settings:
24V, 125A, 6 Feet, 1% allowed Voltage Drop, 90°C Wire Temp
After I installed everything I went through the spec sheet again and realized that the spec sheet says max 100A at 90°C on the 4 AWG Wire.
Therefore my questions:
- I assumed that we have a max amperage draw of 125A (3000W / 24V = 125A), is that assumption correct? Or should I work with higher numbers?
- Is the 4 AWG too thin for the application? Should I use 2 AWG?
- If too thin, can I just double each of the lines (as I already bought and soldered the connectors it would be much cheaper to just double them)
- Is maybe the Circuit Breaker Rating too high?