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Inspecting battery box on a friend's newly purchased boat: Looks messy. Any reason why the PV inputs of the battery box would be filled, but all devices are connected directly to + and -? No DC bus? -Can't find bus bar - should this be bonded? Should it be re-wired so devices are fused...

there are lots of these available. seem too good to be true Some have 12V, 9V, 5V + USB. Some include inverters. drop your 12v battery in & get going. Smart Battery box looks pretty good to use surplus batteries as usb chargers etc. some even support lifepo4 for indoor use, do they need to...