Why This Matters:
Being energy-conscious isn't just about turning off the lights at night. Its about choosing your electrical appliances from the start such that you don't use that much energy overall. For example, a 12V fridge-freezer can store as much as a residential mini-fridge if packed right, but uses 1/3 the energy.
This is important because wind turbines do not produce a lot of power - they produce a lot of energy. Energy is power over time, so the longer something runs, the more energy it uses.
A 400W wind turbine in 10-13mph winds may produce only 40-60W of power, but if those winds are sustained for a whole 24 hours, that equates to 960-1440Wh of energy. That's enough to charge a 12v 100Ah battery to full in just a single day, in wind speeds that are commonly found across the world.
If you have the equivalent of 2-5 of these batteries in your system, this much energy is a big deal. If you have the equivalent of 10+ of these batteries, you would need multiple wind turbines to notice a difference.