US residential PV up 24% through Q3, growth may slow in 2024, says WoodMac

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From pv magazine USA

Residential solar posted modest growth in installations in the United States through the first three quarters of 2023, rising 24% year over year, according to Wood Mackenzie’s latest market insight report. 

Residential solar grew as the supply chain constraints of 2022 improved and Californians rushed to secure solar under a more lucrative rate structure before it transitioned to NEM 3.0 in April. 

However, Wood Mackenzie said the market should temper its expectations for 2024, as high interest rates persist, lowering residential solar demand. It said it expects the California NEM 2.0 backlog of orders to continue into early 2024, temporarily buoying installations figures before they take a dive.

In the third quarter of 2023, residential solar developers installed 1.8 GW, up 12% year over year and setting a new quarterly record for the nation. However, Arizona, Florida, and Texas – all major residential solar markets – experienced quarterly and annual declines in installed capacity in the third quarter.

Installers are meeting these challenges by focusing on operational efficiencies and experimenting with pricing and product offerings to survive the slowdown. 

While high interest rates and policy changes like those seen in California are pushing down the 2024 outlook for residential solar, Wood Mackenzie said there are some tailwinds at play. 

“While high interest rates persist, the segment has some tailwinds, such as module oversupply resulting in lower pricing,” it said. “Coupled with increasing retail rates, installers can still provide customers with a compelling value proposition in some states. With third-party ownership (TPO) products less sensitive to interest rate increases than loans, installers also continue to report an increase in TPO installations.” 

Wood Mackenzie forecasts 13% growth in the residential solar market in 2023. However, looking ahead to 2024, the firm expects a 12% national contraction.  

“The residential solar market will recover in 2025 and grow at an average annual rate of 10% between 2025-2028 as growth picks up in emerging markets,” it said. 

As the residential solar-plus-storage market grows, competition is increasing among battery vendors. Wood Mackenzie said that in the third quarter of 2023, 11% of residential solar and 5% of non-residential solar systems were paired with storage. 

According to Wood Mackenzie, Tesla, LG and Enphase remain the big three battery vendors, holding 80% of the cumulative market from 2018 through the third quarter of 2023. However, new entrants are beginning to leave their mark on market share. In 2018, the big three providers were installed on 96% of solar-plus-storage systems, but in 2023 they represented 65%. 

Energy equipment companies like SunPower, Generac, and SolarEdge have carved out spots among the top seven providers. FranklinWH ranks eighth in storage only two years after launching its first product for the sector. 

“The top five players in the residential solar-plus-storage ranking hold 59% of the market, while the top five players in the residential solar market hold just 24%,” said Max Issokson, research analyst for Wood Mackenzie. 

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