Swissolar expects Switzerland’s annual photovoltaic (PV) deployment to average around 1.5 GW from 2025 to 2027, as the sector navigates policy uncertainty and reduced feed-in tariffs. The forecast comes from the industry association’s newly released “Solar Monitor 2025” report, which outlines three potential development pathways for the national PV market and calls on policymakers to maintain consistent support for renewable expansion.

According to Swissolar, Switzerland will add roughly 1.5 GW of new PV capacity in 2025, down from the record-setting 2 GW installed in both 2023 and 2024. Swissolar President Jürg Grossen said that holding annual installations at 1.5 GW would still be enough to keep the country on track for its 2050 climate objectives.

The report notes that solar additions are already reshaping Switzerland’s electricity landscape. In 2025, Swissolar expects solar generation to exceed 8 TWh, equal to about 14% of national power consumption. “The total amount of solar power generated will be equivalent to that of a nuclear power plant,” Grossen said during a media briefing this week.

Swissolar CEO Matthias Egli detailed the report’s three market scenarios.

· The medium scenario anticipates yearly additions of 1.5 GW in 2026 and 2027, rising to 1.8 GW by 2030.

· The braking scenario projects a slowdown to 1.2 GW per year by 2030.

· The express scenario foresees expansion toward 2.7 GW, contingent on favorable policy and market conditions.

Grossen warned that the current market is highly sensitive to costs and regulatory signals. “Electricity is a penny-pinching business. There’s a lot of uncertainty,” he said, pointing to sluggish adoption of new PV incentive models, low feed-in tariffs, and unclear demand expectations. The upcoming blackout initiative, which could lift Switzerland’s ban on new nuclear plants, is also weighing on investor confidence.

Across all segments and system sizes, prices are continuing to fall. Most new capacity still comes from rooftop installations, while agrivoltaics, alpine solar farms, and infrastructure-integrated systems currently make only minor contributions.

Despite headwinds, Swissolar stressed several positive developments. PV and hydropower continue to form a “dream team” for reliable energy supply, and battery adoption is rising steadily. The association will publish its first full energy storage report in spring 2026, projecting national battery capacity to reach 1.25 GWh by the end of 2025 — a roughly 50% increase over 2024.