Re: [Amel Yacht Owners] Re: Leece-Neville 175 Amp Alternator

eric freedman


I have had 3 sets of deep cycle batteries on Kimberlite in 15 years.

The original Amel set of batteries lasted about 2000 hours.

The second set was killed by a defective battery charger after  about 1000 hours.

The current  set (including the starter battery) of 31ev batteries has about 2500 hours on them an still measures very high on capacity.

I believe what kills these “no maintenance” batteries is not adding water to them.

I check the batteries every few months . In the Caribbean there is some water loss due to evaporation.

Other than that the bank is still at about 90%.

Fair Winds


Kimberlite Amel Super Maramu #376



From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Tuesday, June 06, 2017 10:12 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] Re: Leece-Neville 175 Amp Alternator



Thanks Eric,


OK...the 12volt engine and genset alternators don't need 3-stage regulators because they are charging starting batteries not deep cycle batteries.

Deep cycle batteries require a 3 stage (bulk, absorption, float) charging system. Every deep cycle battery manufacturer will tell you that. 

A standard or automotive engine alternator regulator, like Leece Neville, charges at 28.8V constantly and the current falls off as the batteries charge up. The voltage never drops below 28.8V when the batteries are charged and this is a big problem if one runs the engine for a long all day motoring.

28.8V constantly on your deep cycle bank will eventually kill the deep cycle batteries.

IF you only ever motor for a few hours at a time and not every day, then this is not such an issue.

3-stage alternator regulators are not a "scam", they are the best way to look after your deep cycle batteries.



Elyse SM437


Join to automatically receive all group messages.