by Julian Spector
April 02, 2019

If we’ve learned anything from the storage sector, it’s that just because a market segment is tiny now doesn’t mean it won’t be big in a few years.

Residential batteries posted 350 percent growth in megawatt terms last year, after achieving just a few hundred installs a quarter in very recent memory. The overall grid storage sector wasn't much to talk about three years ago, but now, after another record year, it's on track to double and then triple over the next two years.

But there’s a whole class of storage device that gets left out of...