If you bought a Porsche charger, its probably the 3300. Did you read the manual? What did it say? Go download from the ctek 3300 manual from their website. It can take more than 48 hours for the 4.3 if the battery is drained. The 3.3 amp will take longer. The 7000 less time.36+ hours and the battery is still not fully charged. I went by the dealer and spoke to the service manager. He said the CTEK can take a really long time (several days) to charge depending on how low the battery is. If by Monday, it's still not fully charged, bring it in and he will fast charge it.
Really bad idea to leave anything plugged in these days. The cars eat energy.