The Nations Dual Alternator kits for the Sprinter are a perfect solution for rapid charging of larger battery banks in van conversions. We use these in all Sprinter builds with battery systems larger than 200 Amp hour. Another advantage is these largely eliminate the need for solar charging in most use cases which frees up room on the roof for Vent Fans, Air Conditioners and Storage.
The kit can be installed in one day and does not affect the factory warranty of the van. It can be installed on Sprinters with the 2007+ 3.0L V6 or 2023+ 4Cyl HO Diesel Engines and most Ford Transits.