Can a capacitor be charged to 12 volts?

That's going to take a very large capacitor. Do the math. You can charge the cap to 12 V and a boost switcher will convert the cap's decreasing output voltage to 12 V. Let's say the boost switcher is 80% efficient and can operate down to 2 V.

How do you calculate a 12V 8A capacitor size?

To calculate capacitor size, you must define what is the voltage range your device works with. Is it 11 to 13V or 11.9 and 12.1V or something else. However, it is unlikely that you actually want to use any capacitors at all to power a 12V 8A device for 20 seconds. Apr 6, 2022 at 9:31

Can a super capacitor replace a battery?

A super capacitor normally has a capacitance of between 1 to 3000 farads, which make them good substitutes for batteries! We are going to safely charge 2x 400 farad capacitors in series up to 5.4VDC, and feed that voltage through a DC-DC booster circuit.

Should a capacitor be charged up to a high voltage?

As others have said, the fact that the amount of energy being stored in a capacitor is a factor of the voltage squared makes having a bank of capacitors charged up to a high voltage seem appealing, though depending on the voltage level can be difficult to design around.

What is the capacitance of a capacitor?

Capacitance is a measure of how much energy can be stored in a capacitor. A typical power supply capacitor or audio coupling capacitor would have a capacitance of around 0.0001 farads, which is relatively large. A super capacitor normally has a capacitance of between 1 to 3000 farads, which make them good substitutes for batteries!

Can I run a 6-pack of super capacitors in parallel with the battery?

So I decided to run a 6-pack of super capacitor in parallel with the battery to support the (peak moments) the problem is the super capacitor bank need to be charged to 16.2dc volts (6 times 2.7 volts each capacitor)