Solar panels put out DC electricity
Look at what your AC/DC power charger for you computer put out for DC.
V is voltage
A ( or I) is current in amperes
W is watts (power)
W=VA
For example a MacBook. A 16.5 V 3.65 A is required to charge the battery. To find the power (W) 16.5 X 3.65 = 60.225, this the power required and is also the power of the solar panel you will need a 12V 60W rated solar panel
You can also make a solar generator, a solar panel+ charge controller + a deep cycle battery and a power inverter.