Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: When to charge?  (Read 2169 times)

tizdaz

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 590
  • Boom!
  • Location: Chester
When to charge?
« on: February 13, 2018, 03:19:46 am »

Hi guys, just a quick one


I have a voltage LED display that shows current voltage of my 12v cel, question is at what voltage should i disconnect & recharge, its a 12v 22AH gel cel as i know i shouldn't let it drop too low?


cheers :)
Logged
My large-scale TID Build Website: http://www.tizdaz.co.uk/forum

Facebook:
https://www.facebook.com/RCTidTug/

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,027
  • Location: Blackpool, Lancs, UK
Re: When to charge?
« Reply #1 on: February 13, 2018, 09:05:02 am »

If a 12 volt battery gets below 12 volts, its time to charge.  If it doesn't make it to at least 13.5, its time to change.  Either way, its a good idea to check the calibration of the display device against something of known accuracy occasionally.
In a multi battery set-up, it is a good idea to make sure that the battery being reconnected is the same voltage as its mates, a small difference can give a very big circulating current as they even out.  If they connect through a schottky diode unit, the highest voltage one carries the load until its voltage drops down to equal the next, then they bot carry the load.
Logged
"With the right tool, you can break anything" - Garfield

tizdaz

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 590
  • Boom!
  • Location: Chester
Re: When to charge?
« Reply #2 on: February 13, 2018, 08:48:49 pm »

ok thanks :)
Logged
My large-scale TID Build Website: http://www.tizdaz.co.uk/forum

Facebook:
https://www.facebook.com/RCTidTug/

Peter Fitness

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 7,376
  • Location: Wyrallah, near Lismore NSW Australia
Re: When to charge?
« Reply #3 on: February 13, 2018, 09:16:22 pm »

Following advice I received many years ago, I always recharge my SLA batteries after every sailing day, and store them out of the boat fully charged. A couple of them are over 8 years old and still delivering full power, I don't have a digital read out, but charge as a matter of course.


Peter.
Logged

BrianB6

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,191
  • I'm not sure if I can get up from here
  • Location: Melbourne
Re: When to charge?
« Reply #4 on: February 13, 2018, 10:00:23 pm »

I agree with Peter, always charge straight after sailing.   My charger shows a red LED whilst charging and a green LED when fully charged ( was not all that expensive although I have had it many years)
Also try charging after a month or so just to top it up.  SLA's should be kept fully charged.
Logged

tizdaz

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 590
  • Boom!
  • Location: Chester
Re: When to charge?
« Reply #5 on: February 13, 2018, 11:59:42 pm »

great info thanks guys, i wasnt too sure so will just charge after each sail :)
Logged
My large-scale TID Build Website: http://www.tizdaz.co.uk/forum

Facebook:
https://www.facebook.com/RCTidTug/
Pages: [1]   Go Up
 

Page created in 0.096 seconds with 23 queries.