They are closed today but will call again tomorrow.
On principle I would prefer a larger alternator to enable greater use of electrical power during the day, but haven't thought through what issues that may cause.
A separate alternator dedicated to house loads sounds even better on the surface, but again I haven't thought of possible downsides.
I know Mercedes offers second alternator option for Sprinters, and Sportsmobile shows a late-2015 option for Transit and ProMaster (which are probably aftermarket installations). In any case the trend is to go towards more electrical power, not less.
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