The initiative by the Allgäu-based company targets owners of photovoltaic storage systems installed before the end of 2020. The value of the trade-in bonus depends on the capacity of the new Sonnen battery. Sonnen describes the campaign as a “targeted growth initiative in a new market segment.”…
https://www.pv-magazine.com/2025/11/03/sonnen-launches-trade-in-program-for-old-solar-battery-storage-systems-regardless-of-condition-or-manufacturer/
