Work on bespoke Narrowboat ‘Ploddinon’ to improve the charging system. Spec of this new Barrus 50 engine looks impressive on paper with a 240 amp domestic alternator. In reality the owner has found the factory setup not up to modern live-aboard demands.

ploddinon

Charging voltage & current low. Belt squeak and squealing under high load on initial startup or running equipment off the inverter. Alternator’s non adjustable regulator set at ridiculously low 14.2 ish Volts and large battery bank just not getting charged properly (taking time to reach even 14.0+V). Theoretical 240 Amps always unobtainable through narrow 6pk belt and solid (non freewheeling) alternator pulley. I bring it up to the same spec of a Beta Marine 43/50 engine fitting a quality 175amp Iskra Alternator with a freewheeling pulley. Now ~120 Amp+ at tickover with 14.6V regulator and smoother & quieter running engine. Install Adverc system adjusted to 14.8V (sensed at batteries ) to suit the Trojan battery bank. Engine charging system totally transformed and customer happy.

plodinoniskra

 

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