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Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.

Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.

A comparison between the XT and AT series alternators by Balmar

Posted by Peter Kennedy on 5/14/2019 to Alternators
The table below highlights the prinicpal similarities and differences between these two alternator types:

Alternator comparison

These are all small case alternators but there is a considerable size difference between the two models so anyone in any doubt of which to select should start by looking at the dimensions.  Here is the Balmar datasheet  that includes dimensions  but the example below might help to summarize the principal difference between them.

ALternator comparison
Surprisingly the when we look at the key dimension front to back the AT-200 alternator is shorter, see the full dimension sheet for details.



Pulleys

All of these alternators require high performance pulleys, either a double V-Belt or a multi ribbed belt and pulley system.  There is just too much power required to be able to transfer it with a single V-Belt

Regulators

All these alternators require the MC-614-H regulator to reach their full potential.  The field current required to produce maximum output cannot be provided by a lesser regulator.  The XT alternators do include an internal backup regulator, this is included as a "get you home" spare and not intended to be the sole regulator.

Temperature compensation

These are hard working alternators and deserve to be protected by a temperature sensor.  The sensor is included in when you purchase a kit but if buying this as a spare consider a spare temperature sensor also.

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