a decentralised technology like solar or wind, in combination with electricity storage. What kind of electricity storage? As I understand it, this is the hard

a decentralised technology like solar or wind, in combination with electricity storage. What kind of electricity storage? As I understand it, this is the hard part. We don't really have giant batteries that can efficiently and affordably store the power generated from wind or solar. You can either store it as some form of gravitational potential energy (think like a river dam), or as heat or cold, or as a fuel that you later have to burn. These are all pretty difficult and inefficient in the case of solar and wind power.