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Free Energy Hand Crank Generators -- 2.4A/5V Possible?
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soldar:

--- Quote from: radiolistener on September 23, 2019, 03:05:20 pm --- it seems that the best free energy is solar panel  :popcorn:
--- End quote ---


Solar energy is as free as all other kinds of energy. Oil, wind, flowing rivers, coal, uranium, they're all free in nature. You just have to take them and convert them into useful energy. That's where the cost comes in.
Gyro:

--- Quote from: soldar on September 23, 2019, 06:09:41 pm ---
--- Quote from: radiolistener on September 23, 2019, 03:05:20 pm --- it seems that the best free energy is solar panel  :popcorn:
--- End quote ---


Solar energy is as free as all other kinds of energy. Oil, wind, flowing rivers, coal, uranium, they're all free in nature. You just have to take them and convert them into useful energy. That's where the cost comes in.

--- End quote ---

I think several of the items on that list cannot be regarded as "free" in your terms. All have implementation costs, but some have huge environmental costs that don't apply to the others - these are costs that far outstrip those of implementation.

Anything that we do has an implementation cost of some sort, even picking up a pebble.
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