Annual solar additions in Switzerland are expected to hover around 1.5 GW through 2027, below 2023–24 installation peaks, according to Swissolar
The association urges policymakers to stabilize growth with clear rules and stronger incentives for on-site consumption and storage
Battery adoption is rising fast, it notes, with nearly half of 2024 single-family PV systems installed with storage
Switzerland’s solar PV market is likely to grow by 1.5 GW annually through 2027, down from 1.6 GW yearly additions in 2023 and 1.8 GW in 2024, according to the solar association Swissolar. It demands that policymakers take measures to stabilize its expansion.
The 1.8 GW in 2024 represented year-on-year (YoY) growth of 10%, marking the country’s 7th consecutive year of expansion (see Switzerland Added Nearly 1.8 GW New Solar Capacity In 2024).
Swissolar’s Solar Monitor 2025 report outlines 3 main scenarios that project 1.5 GW under braking or slow and medium scenarios each, and up to 1.6 GW in the more optimistic express scenario for solar energy additions in 2025. This year, the country is likely to account for around 14% of the Swiss final consumption, corresponding to over 8 TWh of solar power, up from 10% with close to 6 TWh in 2024.
The average additions in the medium scenario remain the same at 1.5 GW for the next 2 years, with potential to grow to 1.8 GW and 2.0 GW in 2026 and 2027, respectively. By 2030, the association projects annual additions to reach up to 2.7 GW.
Swissolar now demands that policymakers sustain this growth by creating reliable regulatory framework conditions. One of the key recommendations is to promote on-site solar consumption.
“Solar power should ideally be consumed and stored where it is produced. This relieves pressure on the electricity grids and is economically attractive for plant operators,” explains Swissolar President Jürg Grossen.
The association recommends a 7-point Action Plan 2030 for Switzerland to achieve 100% renewable energy supply, which will need to be steered by political will, accelerated permitting, and simplified procedures. It estimates 90% of suitable surfaces as still unused even though solar can be installed on rooftops, façades, and other kinds of infrastructure.
Storage as a backup is on the list; Swissolar calls solar energy combined with wind and hydropower the ‘dream team’ for the country’s reliable energy supply. In 2024, 47% of PV systems on single-family homes were installed with battery storage, according to the report, and this number is likely to increase strongly this year with installation and retrofitting. The association recommends that it is time to make storage economically attractive.
The complete report is available on Swissolar’s website.