The Residential Solar Retrofit Market in California is Beginning to Saturate

15 - 20,000 Jobs are at Risk, Highlighting the Importance of Solar New Construction Initiatives

ARVADA, Colo., March 23, 2018 ( - Lumidyne Consulting LLC today released a white paper illustrating why "an estimated 15 - 20,000 jobs are at risk in California … if steps are not taken to mitigate the downward trend of residential [solar] installations." The analysis forecasts that if current adoption patterns hold, "installations of residential [solar] would be expected to drop from a peak of about 149,000 systems/year in 2016 to ~92,000 in 2018 and 46,000 in 2020 (a 69% drop relative to the peak in 2016)."

The paper notes that after a decade of explosive growth, in 2017 the residential solar market in California saw its first decline in annual installations, a 22% drop relative to 2016. The white paper suggests this decline is likely due to the beginning of market saturation in the residential solar retrofit market, which peaked in December 2015 for all investor-owned utilities in California and has since trended downward.

The paper illustrates how housing growth in California, combined with strong incentives or initiatives to install solar on new construction homes, could help mitigate the decline and avoid job losses in the state. The analysis underscores the importance of initiatives to encourage construction of Zero Net Energy (ZNE) homes in California, which has a goal of 100% of new homes being constructed to a ZNE standard by 2020. However, it suggests that "the growth rate of the percentage of new homes installing solar PV would have to accelerate to materially mitigate the current pattern of decline in the retrofit market," since currently about 20% of new homes install solar.

The paper also applies to other states, and notes that "unless steps are taken to mitigate the effect, one can expect a ripple of ‘boom and bust' waves to propagate across the country as each [solar] retrofit market ultimately becomes saturated."

The white paper can be downloaded for free at
About Lumidyne: Lumidyne Consulting LLC ( is a boutique consultancy dedicated to facilitating the transition to a clean energy future. They have deep expertise in distributed energy resources (solar PV, battery storage, etc.), advanced modeling techniques, and development of decision support tools.

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