Solar cell

When I want electricity at a camp, it's easy to use solar cells. However, its use is limited due to its low power generation efficiency. Connect to a mobile battery and charge during the day. That's possible to charge the smartphone partly.
In addition to smartphones, if I want to charge the camera batteries or a lantern as a power source, I need a generator driven by gasoline engine.

... Hydropower was a blind spot. Campsites are limited, but if it is possible to use a stream with enough flow to turn a turbine, that's probably the best option.

The comfort of the camp changes greatly depending on whether the camp site is illuminated or not. Old-fashioned lanterns such as gas, gasoline, kerosene, or candles are standard, but the LED lanterns are easy, safe, and maintenance-free.
Life without electricity may not be possible anymore.

水からの自家製の基本的な電力システム、水力発電エネルギー開発プロジェクト| Off Grid Ep.7 | ana bushcraft