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Click here to view full installation instructions for the Kestrel 90
Overcomes the problems of recharging auxiliary batteries.
Allows your alternator to operate as a superb battery charger and stops premature alternator shutdown.
Ensures your auxiliary batteries are recharged to their maximum level.
Reduces recharging time. Recommended for large or multiple battery systems subjected to heavy discharge,
such as Boat cabin service batteries.
For use with all modern alternators having electronic regulators. Compatible with all types of charge splitting
systems or battery changeover switch systems. Automatic operation, adjustable to suit all battery/alternator combinations.
Simple installation.
APPLICATION OF THE KESTREL 90 ALTERNATOR CONTROLLER
Because an engine starting battery loses very little capacity during normal starting,
the energy can be replaced in a very short space of time, generally within 5 to 10 minutes.
However, Cabin Service batteries which have become well discharged always require an extended period of recharging.
Unfortunately, once a battery has been on charge for more than about 1/2 hour, changes take place on the surface of the plates,
and within the electrolyte, which have the effect of increasing the internal resistance.
This build up of internal resistance will inhibit the flow of charging current, which will slowly diminish,
very often to no more than a trickle. This will happen in spite of the battery being far from fully recharged.
It is estimated that batteries recharged in this way never reach more than about 70% full charge. For this reason,
the build up of internal resistance has little chance to affect starting batteries but badly affects discharged Cabin Service
batteries.
The charging voltage slowly increases in response to the build up of charge in the battery. When it reaches approximately
14 volts, the alternator's own regulator 'clamps' the voltage at that level and stops any further increase.
It is at this point that the charging current will start to slowly diminish. Fitting a larger alternator will not solve the
problem, it will simply get you to the point where the alternator shuts down, more quickly!
The'KESTREL 90' ALTERNATOR CONTROLLER is an electronic regulator which takes over the control of the charging voltage,
and allows the voltage to continue building up until it reaches 15.5 volts. This may take some time, and during this period,
the charging, current will be maintained thus allowing the battery to continue charging. Furthermore,
the charging current will be maintained at a level set by the user, thus ensuring that the batteries are only charged at a
rate which is compatible with their size,
and acceptable to the alternator. Eventually, the battery voltage will reach 15.5 volts, which is a good indication that
the battery has reached a high state of charge. When this point is reached, the 'KESTREL 90'will automatically switch off,
and control will return to the alternator's own built in regulator. The 'KESTREL 90' will not operate again until it is either
manually reset, or the engine is stopped and restarted.
 The 'KESTREL 90' is a 'Battery Sensing' device,
and is therefore compatible with all diode or relay charge splitting systems. It is equally acceptable on systems employing
Battery Changeover switches. It will convert any 'Machine Sensed' alternator to a 'Battery Sensing' type, thus enabling the
alternator to compensate for any volt drop caused by cable runs, ammeters, or other charging circuit irregularities.
Installation is straightforward, and does not involve replacing or discarding the alternator's standard regulator.
Removal of the 'KESTREL 90' will return your alternator to normal operation.
You can purchase our Kestrel 90 Alternator Controllers online by clicking here
BE KIND TO YOUR BATTERIES ...
FIT A 'KESTREL 90' ALTERNATOR CONTROLLER FOR BETTER CHARGING AND PROLONGED BATTERY LIFE.
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