Low voltage after battery and alternator replacement

[VolvoAffair]

Hello:

I recently replaced the alternator with a remanufactured Bosh, and installed a new Interstate battery. Unfortunately, I am only 13.42 volts while the engine is running without any accessories on.

Please advise

[RickHaleParker]

So far I don't see anything that warrants concern.

Measure the battery voltage after a 30 minute rest. Post the measurement.

Alternator range is 13.5V - 14.5V. The Alternator voltage will drop to 13.5V when the battery is fully charged.

Keep in mind the voltmeter might be a little off or there might be a small voltage drop across the length of the voltmeter leads. Which can account for the missing .08V.

You can try discharging the battery to about 13.0V. Then start the engine and measure the alternator voltage as it charges the battery up.