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Building for an off-grid cabin on an island here in Finland. Just waiting for the 8 CALB LiFePO-cells from Aliexpress and it is complete. I also have two 300W mono panels waiting. Also, a Victron SmartBattery Sense is standing by for low-temp cutoff. Thanks Will for your inspiring videos! Any...

Hi, just one quick newbie question: Is anybody putting a master switch also on the PV line from the solar panels to the MPPT controller? Or is that an unnecessary item?