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

eric freedman


The top of my batteries were covered with a big label.

Once I cut the label.

About 1/3 of the top of the battery was the cover of all the 6 cells..

I put a very large screwdriver under the lip of the cover and popped the entire cover off.

Take a close look at the top of the battery, they had to fill the battery somehow when it was made.

Fair Winds


Kimberlite Amel Super Maramu #376



From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, June 07, 2017 3:02 AM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Re: Leece-Neville 175 Amp Alternator



Hello Alan,

my solar panels also deliver 28.8V to my house batteries for long periods of time. However the charge regulators ensure that no current is flowing until needed. When the controllers sense a need for a top up charge they allow a 5 amp charge for a few seconds only. This is good for the batteries and is similar to the way that recovery chargers work.

I tried to avoid motoring whenever possible, but when doing so, I have monitored the charge output from the Leece-Neville alternator. When the house bank is charged, the alternator output current is zero, a similar situation to the solar panels taking control of charging. My 12 house batteries will be 4 years old in October, and so far all the state indicators are in the green.

It is true that Leece-Neville have a new regulator for our generator, but as far as I can see, I don't think I have a problem.

I agree with Eric that batteries can dry out, particularly in hot climates. However I have yet to find a way to 'break in' to my sealed batteries.

Thank you for your suggestion Alan. I will take  a look in the files section at the modification. I guess that a regulator capable of handling 175 amps is going to expensive?

Kind regards

Ian SM2K 414 (2003) 'Crusader' Cyprus


On 06/06/2017 11:39, divanz620@... [amelyachtowners] wrote:


Well done Ian !


While you are about it you may consider  fitting an external regulator that will charge the house batteries correctly


There are a couple of ways of doing this which are illustrated well in the files section.


The problem with the internal LN regulator is that is delivers 28.8 volts... forever....., and that will eventually kill your deep cycle house batteries if you motor for long periods.


If you do motor for hours you need to have a system that will deal with charging your deep cycle house batteries in a 3-stage manner ...if you want to prolong the life of your batteries.


if you have plenty of money to spend on batteries then  I guess it doesn't matter.




Elyse SM437



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