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Why is my C60 charge controller labeled as a C40 inside the unit?

PCB p/n 2230E is used on BOTH the C40 and C60. The silkscreen might only say C40. The fact that the 48V jumper pins missing indicates this is in fact a C60.

This change only went into effect Mar 2013. 

Here are some images that show what the C60 looks like inside and the confusion between the C40 and the C60. 

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