Sonnen launches trade-in program for old solar battery storage systems regardless of condition or manufacturer
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.” November 3, 2025 Sandra Enkhardt Image: Sonnen From ESS News Sonnen is launching what it claims is Germany’s first battery storage exchange program. The company is offering households that installe...












