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Created October 14, 2020 17:04
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Thoughts on 24V vs 12V
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24vs12.md

24V Electrical Concept

Assumptions

Open Questions

  • Does REC BMS that supports 24V also support Victron? Yes

  • Does Wakespeed 500 support 24V? Yes according to Nation's? Yes according to Nations and Wakespeed manual.

Benefits

  • MPPT is 3 kg and 4393750 mm^3 and ~$450 for 24V vs 4.5 kg and 6563160 mm^3 and $700 for 12V
  • Alternator line temperature rise will be 1/4 of 12V for equivalent wire.

Similar/Equavalent Wire Comparisons:

12v to 24v Equivalent Voltage Drop % and Equal Loss for the Same Transmitted Power

V=IR. Because I has decreased by 1/2 and Vsource has increased by 2, to achive the same fraction of Vsource/Vdrop, Vdrop must also double. This implies R must increase by a factor of 4.

P = R*I2. I has decreased by a factor of 1/2, thus I2 has decreased by a factor of 1/4. This implies R must increase by a factor of 4.

4/0 becomes 2 AWG

2 AWG becomes 8 AWG

8 AWG becomes 14 AWG

12v to 24v Equivalent Ampacity for Same Power

4/0 becomes 2 AWG

2 AWG becomes 6 AWG

8 AWG becomes 14 AWG

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