How to convert AC to specific DC - solar powered laptop

David Kareem: 
 

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!

Solar panels usually produce a D.C. output not an A.C. output.

I would use the manufacturer's power supply unit for the laptop to save damaging it. If you can provide  a reliable input Voltage of say 100 Volt to 240 Volts A.C. into the power supply it will automatically provide the laptop with a safe supply Voltage. This can be provided by using a suitable step up transformer if the source is sufficient and can provide sufficient current.

Typical example of a laptop power supply designed for 100 to 240 Volts input A.C.

Or you may be able to get a vehicle power supply unit designed to power the laptop. These may be able to work on 12 to 24 Volts D.C. input  If only A.C. is available then a bridge rectifier will be required to convert the A.C. to unsmoothed D.C. Smoothing may be required by the use of a capacitor, but this will increase the D.C. Voltage somewhat.

Z.

David Kareem: 
 

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!

Solar panels usually produce a D.C. output not an A.C. output.

I would use the manufacturer's power supply unit for the laptop to save damaging it. If you can provide  a reliable input Voltage of say 100 Volt to 240 Volts A.C. into the power supply it will automatically provide the laptop with a safe supply Voltage. This can be provided by using a suitable step up transformer if the source is sufficient and can provide sufficient current.

Typical example of a laptop power supply designed for 100 to 240 Volts input A.C.

Or you may be able to get a vehicle power supply unit designed to power the laptop. These may be able to work on 12 to 24 Volts D.C. input  If only A.C. is available then a bridge rectifier will be required to convert the A.C. to unsmoothed D.C. Smoothing may be required by the use of a capacitor, but this will increase the D.C. Voltage somewhat.

Z.