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In my fleet I run 25 amp float only chargers on 8D batteries (currently downsizing to group 31) for engine starting an ECM power. As long as you are not starting frequently you don't need much charger to keep a battery charged. Even a Caterpillar 3500 series engine with electronic injectors only...

The current in the stator creates a magnetic field that opposes the field from the rotor. If you put a fixed voltage into the rotor field, as the stator field increases the field current decreases and the stator output voltage decreases. Capping the output voltage from the regulator to the field...

I'm late to the thread and don't know if this has been covered but electrolytic capacitors don't tolerate long term storage. When de-energized the insulating oxides inside break down and cause the capacitor to short circuit internally. The general rule of thumb is that electrolytic capacitors...