Fronius Symo option to add string fuse holders (default is without) 4,251,006.
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Fronius Symo StringFuseHolder
Fronius option to add string fuse holders to the Symo inverters 15kW and up. This adds 6 fuse holders in both the positive and negative DC inputs for string combining inside the inverter. Fronius product code 4,251,006.