12V or 24V for RV's - In Which Case is 24V a Better Choice?
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UPDATE 1: 5:23 The current needs to be 277A instead of 227A, so the new power dissipation is 42W @ 12V.
UPDATE 2: 8:17 100A+100A in series = 100A of current, not 200A.
If you’re building an off-grid solar power system, choosing the right voltage is crucial. Many people default to 12V, but is it really the best option? In this video, I’ll break down the differences between 12V and 24V, showing you where 12V falls short, how 24V can save you money, and when you might actually want to stick with 12V instead.
We'll cover:
Cable size and cost – Why 12V requires thicker, more expensive wires
Charge controller savings – How 24V cuts your controller costs in half
Battery charger efficiency – Why 24V makes charging cheaper and easier
Power loss in low-voltage systems – How much energy you're wasting at 12V
The downsides of 24V – When 12V might still be the better choice
If you have more than 400W of solar or an inverter larger than 2000W, a 24V system is often the better choice. But if you need to charge from an alternator, you may still want to stick with 12V.