Hi @Sc0rp1c and welcome look at the Service Manual, you have a barebone clevo NH77DDW-M Download the NH77DC_DD(20200426).zip https://my.hidrive.com/share/yze8mg-wf8#$/CLEVO%20Service%20Manual%20Books/N_Series/NH/NHxxDxx Look at page IV. : IMPORTANT SAFETY INSTRUCTIONS 5. This product is intended to be supplied by a Listed Power Unit as follows: • AC Input of 100 - 240V, 50 - 60Hz, DC Output of 19.5V, 9.23A (180 Watts) minimum AC/DC Adapter. or page Specifications 1 - 3 Power Removable 4 Cell Smart Lithium-Ion Battery Pack, 48.96WH Full Range AC/DC Adapter AC Input: 100 - 240V, 50 - 60Hz DC Output: 19.5V, 9.23A (180W) so you don't need more and now see here: https://www.fraron.de/wechselrichter/reiner-sinus/12v-auf-230v/swi180w12v-spannungswandler-180-watt-12v-reiner-sinus_13475355_14031/?ReferrerID=7&gclid=Cj0KCQjw8p2MBhCiARIsADDUFVGuAhmJUUfrjCHGY2HKdV85HD4PhtA9ntF9BxpxfH42oTUsmZ6XDxQaApZXEALw_wcB bye Fishtown
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