I think someone could build an innovative electrical power plant using this technology at Relampago del Catatumbo (Venezuela's everlasting lightning storm): https://www.atlasobscura.com/videos/see-venezuela-s-everlast...
https://engineering.mit.edu/engage/ask-an-engineer/is-there-... discusses the idea a bit. TLDR is: it probably isn't worth it :/
The only "capacitor" I know of large enough to handle this amount of instant power is the one used to "spark" JET tokamak fusion [1]. There are two 775 ton flywheels that can dispense over 3 GJ instantly and "charge" via grid feed rate of around 8MW.