Wood Mackenzie published their quarterly storage market update today. In Q3 2019, the storage market grew 93% over last year. The total market (Resi, Non-resi, and Front-of-the-Meter) is expected to grow from $489M in 2018 to $645M in 2019. And by another 6x in just 2 years.
Wood Mackenzie expects the US storage market to grow more than 6x and reach $4B in 2021.