ECN Forum Forums General Topics of the Trade General Discussion Area Why corrosion on only one of 2 busbars?

Charlie, Is it possible that you have an unbalanced system and the buss / terminals in question are getting hot? That would cause any condensate to evaporate, leaving behind mineral deposits.

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white powder corrosion is an aluminium thing.check that the lugs used are compliant with the bus bar. id also clean everything up with a wire brush and make sure all the connections are tight. you say that the area isnt damp, but how far away from the sea are you. seaside areas suffer a lot from the salt in the air.