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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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  • Former Community Member
    0 Former Community Member

    If the panel output really is 18v AC then a normal mains transformer used “backwards” could produce 110 or 240vAC to drive the laptop's existing power unit.

    Cost about £25 and exact rating is not critical since most laptop power units work anywhere between 90 and 250v.

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  • Former Community Member
    0 Former Community Member

    If the panel output really is 18v AC then a normal mains transformer used “backwards” could produce 110 or 240vAC to drive the laptop's existing power unit.

    Cost about £25 and exact rating is not critical since most laptop power units work anywhere between 90 and 250v.

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