Cummins/Onan — Adjusting Voltage Regulator Relay Charge Rate
Adjustments
From a Cummins/Onan owner's manual — check it applies to your exact model before use.
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Procedure
- Set for about 6 amps charge when batteries are less than 3/4 fully charged.
- Charge rate should drop to about 2 amps or less when fully charged.
- Increase spring tension to advance the high charge rate cut-in point.
- Decrease spring tension to retard the high charge rate point.
Specs & values
- Charge rate approximately 6 amps
- Charge rate approximately 2 amps or less
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.