Cummins/Onan — Battery charger adjustment
Adjustments
From a Cummins/Onan owner's manual — check it applies to your exact model before use.
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Before you start
- The above procedure is for lead-acid batteries only.
Procedure
- When the battery charger is put into operation adjust for minimum charge rate.
- Check the batteries weekly; if the charge condition drops even slightly, increase the charge rate 20 milliamperes.
- Repeat the weekly check and increase in 20 milliampere steps until the charge condition stabilizes.
Specs & values
- New battery operating at 70°F requires approximately 50 milliamperes per 100 ampere hours capacity
- 4 amp high rate; adjustable low rate 0.40 to 0.200 Amp
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.