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How to convert AC to specific DC - solar powered laptop

Former Community Member
Former Community Member

I'm building a solar powered laptop system and I have a question regarding to elecricity. Solar panel will be source of power which can produce 100W 18-21V 6A of AC. My laptop needs 19,5V 3,33A 65W of DC. How can I connect this two devices and make laptop run on solar power? It would be great to not use any additional battery, because laptop does have its own one.



Thanks for help!


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    If the panel is rated 100W it will usually produce less, unless you're in a very sunny climate. If the laptop max draw is 65W (what's typical?), then the system is likely marginal, often will produce less power than consumed. So “inefficient” could be bad news. And there's no reason why COTS supplies design for mains or vehicle battery source should cater for less-in-than-out use cases. I guess that charging laptop battery while it's not running is the viable use case, but not actually running the laptop directly off the panel.

    I dunno if laptop power use is mostly increased by heavy computing, backlight, or straining wifi? 

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  • 0

    If the panel is rated 100W it will usually produce less, unless you're in a very sunny climate. If the laptop max draw is 65W (what's typical?), then the system is likely marginal, often will produce less power than consumed. So “inefficient” could be bad news. And there's no reason why COTS supplies design for mains or vehicle battery source should cater for less-in-than-out use cases. I guess that charging laptop battery while it's not running is the viable use case, but not actually running the laptop directly off the panel.

    I dunno if laptop power use is mostly increased by heavy computing, backlight, or straining wifi? 

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