Are External Regulators Universal, Can You Use Them On ANY Alternator? PYS Tech Talk
October 8, 2026 · 5 min · 5K views
What this video covers
Any stock alternator can be modified for use with an external regulator to increase charging output.1:06 Jeff Cote of Pacific Yacht Systems explains that while internal regulators prioritize safety and caution, they often limit an alternator to roughly half of its rated capacity.1:25 To enable external regulation, a technician must remove the internal regulator from the alternator and install a field wire to allow external control of the voltage.2:17 This modification allows for the integration of advanced external regulators like the Wakespeed, which offers superior user features and temperature sensing for both the battery and the alternator compared to older models like Balmar.1:33 While the process is not plug-and-play and requires professional shop modification, it can boost the effective charging current of a standard 125-amp alternator by approximately 50 percent.2:51 This upgrade reduces engine run time for cruisers needing to charge large house battery banks.4:02
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