Voltage Regulator Setting

m_stock10506 · Dec 16, 2019

How much is too much? I just replaced the brushes on the charging system of my 1984 R100. It has a new adjustable voltage regulator. It was set to limit the voltage to about 13.9-14.0 volts. I adjusted the setting and it is now maxing out at 14.4 volts. The battery is a sealed AGM.

Is 14.4-14.5 volts okay to run with?

20774 · Dec 16, 2019

I'm sure Snowbum has something on that. But 14.4-14.5 is probably OK around town but might be too much for sustained highway speed.

-- update -- Snowbum suggests settings of 14.3 to 14.7 for most types of batteries; he says that battery life is improved with settings of about 14.3 or slightly more.

https://bmwmotorcycletech.info/testingvoltageregulators.htm

https://bmwmotorcycletech.info/altcapability.htm

chunk · Dec 16, 2019

m_stock10506 said:
How much is too much? I just replaced the brushes on the charging system of my 1984 R100. It has a new adjustable voltage regulator. It was set to limit the voltage to about 13.9-14.0 volts. I adjusted the setting and it is now maxing out at 14.4 volts. The battery is a sealed AGM.

Is 14.4-14.5 volts okay to run with?

I think AGM's like the higher charging voltage. Check the manufacturer's web site for the proper charging of that battery, or at least AGM's in general, but I think you're good.

RPGR90s · Jan 13, 2020

V.r.

m_stock10506 said:
How much is too much? I just replaced the brushes on the charging system of my 1984 R100. It has a new adjustable voltage regulator. It was set to limit the voltage to about 13.9-14.0 volts. I adjusted the setting and it is now maxing out at 14.4 volts. The battery is a sealed AGM.

Is 14.4-14.5 volts okay to run with?

it should be fine. I have my VR set to the same value and been running the same AGM battery for about five years now with zero issues.

Voltage Regulator Setting

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