The hull volume behind science-fiction energy weapons

If science-fiction energy weapons followed real principles, how much hull volume would batteries and capacitors occupy?

Large portions of the hull would be needed for batteries and capacitors. The panel gives no numerical volume estimate and raises problems with the highest fictional energy claims.

Large battery and capacitor banks would occupy substantial hull volume if the fictional beam weapons had to use the principles assumed in the question. No percentage is calculated. One panellist argues that the highest claimed Star Wars energy levels would create a singularity and collapse the ship before heat disposal became the main concern. The Galaxy class's ring phasers are also cited as weapons that would require extensive power storage around the hull.