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> This means that the solar power cannot provide enough power to charge the battery, although I am using a 60W solar panel for ~5W Raspberry Pi.

Just because there's "light" doesn't mean the panel will produce power. The sun has to shine BRIGHTLY.

This is why solar power in Berlin or London is a waste of resources, because the sun doesn't shine BRIGHTLY there.




Objectively false: my system in Scotland (56 north) works quite nicely, and even on cloudy days you get a considerable amount of power. The power output is simply proportional to brightness. It is, after all, just a big flat photodiode.


Considerable does not translate into 100% efficiency. This is what the original article means.

In your specific case you had to over provision your solar installation compared to , for example, Egypt.




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