Being enthusiastic about battery technologies is one thing, spreading misinformation to support someone convictions is an other.
What causes the Iberian blackout is excessive reactive power and a lack of compensation at a given time (due to multiple factors).
Compensation of reactive power has strictly nothing to do with localization of generation. It barely even can be assimilated to oscillations
That's complete garbage and it shows mainly you do not seem to know much about Electricity power in general.