GTM Storage ArticlesThe Stars Are Finally Aligning for Residential Storage Goodbye, flat growth. Hello, hockey stick. 0 by Julian Spector March 13, 2018 For a while, residential storage was talked about everywhere, but almost impossible to find. The quarterly tally from GTM Research stood out more for how few batteries made it into homes, even as Powerwall mania raged. But times have changed. With the final data in from 2017, it's clear that the megawatt-hours of storage deployed behind the meter increased by 79 percent year-over-year, setting records for the residential and commercial segments. The megawatt-hours deployed behind the meter in Q4 alone grew 362 percent compared to Q4..