Wood Mackenzie projects that the U.S. energy storage market will reach well over US$500 million in sales this year, following on 61.8 MW / 156.5 MWh of installations during the second quarter. Residential storage has grown at 61% per quarter since Q1 2017.
The headline for residential energy storage growth during Q2 is just as splashy as the 9X growth in the first quarter. Although this time, we get overall market growth of 200%, a new “non-emergency” peak volume of installations, and relatively strong contributions from all three sectors.
The report, US Energy Storage Monitor, by Wood Mackenzie Power & Renewables shows 61.8 MW / 156.5 megawatt-hours (MWh) of energy storage deployed in the quarter, versus Q1 2018 which saw 43.6 MW / 126.3 MWh – growth of 42% and 24% quarter over quarter, respectively. Compared to Q2 2017, the growth rates were 60 and 200%, respectively.
The report notes that California and Hawaii dominate the residential market, and are expected to continue to do so, with 72% of all installations. However, Massachusetts and Arizona have a chance at making a move pending their own market adjustments.
The residential market has shown the most consistent growth of the three sectors, with positive quarter-over-quarter numbers since the beginning of 2017 – cumulatively experiencing 60.6% quarterly growth.
In fact, during this quarter residential was the leading sector in both MW and MWh installed. This aligns with prior research communicating 74% of residential customers have shown interest in energy storage.
However, this growth is constrained by supply starting right about now, as evidenced by Tesla shutting down one Powerwall line for the Model 3, and Green Mountain Power still being short Powerwalls for their distributed power plant, and anecdotal evidence of the Sharp SmartStorage system having a six month wait. Wood Mackenzie expects the second half of the year to show flat growth relative to the first half of the year in the residential market due to these supply constraints.
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