12v mobile requirement

I’m looking into adding my Drobo to my sailboat and want to know if there are others that have ditched the 120/12v factory power converter for a dc to dc 12v regulator to apply power to your 5N(series) Drobo? If so have you seen power issues due to poorly designed regulators or overheating issues due to heatsinks?

Did you build your regulator or purchase and if later then what was the model.