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.