How do you make an actual battery out of a solar panel?

A battery and a solar panel are two different things, a solar panel makes electricity, a battery stores it, cant be done.

A solar panel absorbs sunlight and converts it to electricity but they don't typically store that energy. But you can attach it to a battery or a bank of capacitors.

In the article above it mentions several manufacturers. Give them a look, they might already make what you're looking for.

You CAN`T make a battery out of solar panels ! A battery STORES power , but doesn`t produce it …………….. solar panels PRODUCE power , but don`t store it .

You can use solar panels to charge a battery . You`d need a battery , a solar panel or panels to equal more voltage output than the battery requires , or at least the same voltage , and a charging regulator .

You might find diagrams using Google.