How long to recharge batteries while running

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  How long to recharge batteries while running

search | FAQ | profile | register | author help

Author Topic:   How long to recharge batteries while running

montaukman posted 04-12-2006 08:38 AM ET (US)
Hi Everyone,
Can anyone tell me how long it takes for the batteries to re-charge when running the engine? I have a 2005 90 merc 4 stroke with a dual battery set up and they were slightly weak from the season.
I have charged them but I am curious how long it generally takes to get a good charge...i want to go fishing and run the light, depthfinder, radio etc while the engine isn't running and I'm afraid it will pull too much juice out.
Any help?
Thanks,
Alan
bsmotril posted 04-12-2006 10:27 AM ET (US)
It all depends on how far down they were when you started. Might take 15 minutes, might take 8 hours of running. Unless you know for sure how flat they were, it's all speculation. If you have a voltmeter, you'll know they're charged when the votmeter reading drops from 14-15 volts down to about 13.5 - 13.8 volts at cruising speed. Lost of additional good info in the reference section of this site: http://www.continuouswave.com/whaler/reference/electrical.html
BillS
jimh posted 04-12-2006 01:20 PM ET (US)
The capacity of a battery to store electrical energy is measured in Ampere-hours.
The time it takes to fill a battery with as much electrical energy it can hold is proportional to:
--the capacity of the battery to store electrical energy
--the rate of current flow used to charge the battery
--the duration of the current flow.
The time it takes to depete a baterry of electrical energy is proportional to:
--the capacity of the battery to store electrical energy
--the rate of current flow used to discharge the battery
--the duration of the current flow.

Please supply the following data:
--the capacity of the battery in Ampere-hours
--the rate of current flow used to charge the battery
--the rate of current flow used to discharge the battery
--the duration of the current flows

Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.

Author	Topic: How long to recharge batteries while running
montaukman	posted 04-12-2006 08:38 AM ET (US) Hi Everyone, Can anyone tell me how long it takes for the batteries to re-charge when running the engine? I have a 2005 90 merc 4 stroke with a dual battery set up and they were slightly weak from the season. I have charged them but I am curious how long it generally takes to get a good charge...i want to go fishing and run the light, depthfinder, radio etc while the engine isn't running and I'm afraid it will pull too much juice out. Any help? Thanks, Alan
bsmotril	posted 04-12-2006 10:27 AM ET (US) It all depends on how far down they were when you started. Might take 15 minutes, might take 8 hours of running. Unless you know for sure how flat they were, it's all speculation. If you have a voltmeter, you'll know they're charged when the votmeter reading drops from 14-15 volts down to about 13.5 - 13.8 volts at cruising speed. Lost of additional good info in the reference section of this site: http://www.continuouswave.com/whaler/reference/electrical.html BillS
jimh	posted 04-12-2006 01:20 PM ET (US) The capacity of a battery to store electrical energy is measured in Ampere-hours. The time it takes to fill a battery with as much electrical energy it can hold is proportional to: --the capacity of the battery to store electrical energy --the rate of current flow used to charge the battery --the duration of the current flow. The time it takes to depete a baterry of electrical energy is proportional to: --the capacity of the battery to store electrical energy --the rate of current flow used to discharge the battery --the duration of the current flow. Please supply the following data: --the capacity of the battery in Ampere-hours --the rate of current flow used to charge the battery --the rate of current flow used to discharge the battery --the duration of the current flows