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Old 09-22-2008
zul zul is offline
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Advice needed on some basic charging issues...

I've upgraded my house bank to about 250Ah to cater for a small fridge. I have a 51A Prestolite alternator running on a Perkins 4108 and a solar panel for top-ups between weekends. I'd like some advice from anyone who can help...

1) Does it make sense to add a 3-step smart regulator (or is this only appropriate for larger alternators)?

2) Does anyone know if the ubiquitous Prestolite 8EM2017KA is a P-type or N-type alternator (no response from Prestolite)?

3) If it does make sense to upgrade, and the Prestolite is N-type (as I suspect), can I remove the internal regulator completely and run a field wire to the positive brush from the 3-step reg?

4) My pulley ratio is about 1:1.4, giving an alternator RPM of 2,100 at an engine RPM of 1,500. Anyone have a sense of whether this is enough RPM for the alternator to deliver efficiently?

Many thanks
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