In general, batteries are needed for both solar and wind power because neither of these provide constant power.
Advantages of solar:
- Almost maintenance free (once setup)
- Easily scalable (It is easy to add solar panels to an existing system).
Disadvantages of solar:
- higher cost
- The production of solar panels consume more resources
Advantages of wind:
- lower cost
- More power is usually available from wind than from solar
- Higher efficiency for the larger turbines (although friction is significant for the smaller turbines lowering their efficiency).
In general you would have solar power for small amounts of power (like a small number of electronic devices). Even more so, if the location is remote like weather monitoring stations or satelites.
Wind would be the better option if you want to produce a significant amount of power. Wind farms would be better than solar farms if replacing power plants.
If you want to power a home, I believe that wind is probably still the most cost-effective method unless you consume a very small amount of power.
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