Charging from truck charging system
Have a 2014 W&P and for the most part have had very few issues until this week. 1. When going down road the battery will not stay charged by truck Alt. 270 amp. Alt can handle this. The refe...
Forum Discussion
kerrlakeroo wrote:theoldwizard1 wrote:kerrlakeroo wrote:
First thought, try a voltage check on the battery, with truck disconnected and shore power off, then connect truck and check again to ensure you are getting a good connection to the truck. Voltage should come up from 12.5 or so disconnected to 13.8-14.2 with truck connected and running.
That voltage will keep a house battery from going dead, but will never fully recharge it.
I understand that, but his question was recharging from truck, Voltage should increase unless a problem is in the system, ...
Not true anymore. Abuot 10-15 years ago, all light/medium duty vehicle manufacturers went to "smart" charging system. A few minutes after the engine is started, the output from the alternator and its internal regulator will be about 13.6-13.8V. Certainly less than 14.0V.
Not enough to properly recharge a deep cycle battery bank to is at 50% DOD.
