The LED light flashing on your Progressive Dynamics 4500 Series Inteli-Power Converter # PD4575K18LS8 just indicates which charge mode it's in.
If its a fast flash, then that's indicating that it's in "Normal Mode" - which continuously monitors power usage and provides good charging capability and reduces water consumption.
If it's a slow flash, then that's indicating that it's in "Storage Mode" -which ensures the battery remains charged and reduced water boil-off during storage or long... view full answer...
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