An external alternator regulator is very useful when fitting lithium batteries and sets alternator voltage, monitors/limits alternator temperature and makes it easier to turn an alternator on/off with the batteries BMS or a a Battery Monitor. For lithium batteries the Balmar MC-614 or Mastervolt Alpha Pro are great. See my lithium page.

I keep both the Balmar and Mastervolt controllers in stock and can fit them to an existing alternator or potentially significantly improve charging performance fitting a different alternator/setup. You don’t need to use the expensive Balmar or Mastervolt alternators which are often sold with the controller.

With the rise in popularity of the Trojan/Crown/US Batteries with a ~14.8V recommended charging voltage fitting an external adjustable voltage regulator is highly recommended.

10/02/21. At the moment I have a used Adverc available for me to fit with a proper 1 year warranty. Please call for details and any questions.

If you think you have a problem with a Battery Management system or any charging or electrical problem on a narrowboat I’m happy to help.