+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Newbie level 1
    Points: 15, Level: 1

    Join Date
    Jun 2018
    Posts
    1
    Helped
    0 / 0
    Points
    15
    Level
    1

    Efficient battery charging on solar, at sea!

    I'm rowing the Atlantic this winter and wanted some advice on charging devices from the boats solar charged battery. Would I be better charging devices (phones, iPods etc) direct of the ship's battery as a when required or only charging charging a power store from the ship's battery less often to top up devices with? We will have quite strict power conservation drills when sunshine is poor to ensure watermaker, nav and comms kit take priority but keen to be as optimal as possible. I mainly want to protect the performance of the boats battery, not bothered if I degrade the performance of a power store but would like to not kill the teams personal device batteries if possible.

    •   AltAdvertisment

        
       

  2. #2
    Super Moderator
    Points: 73,697, Level: 66
    Achievements:
    7 years registered
    Awards:
    2nd Helpful Member
    betwixt's Avatar
    Join Date
    Jul 2009
    Location
    Aberdyfi, West Wales, UK
    Posts
    12,065
    Helped
    3998 / 3998
    Points
    73,697
    Level
    66

    Re: Efficient battery charging on solar, at sea!

    With the exception of a small energy loss in the charger itself, which you can ignore, it makes little difference how the power is distributed between the devices. Obviously, give priority to essentials but if they have sufficient reserve there is no harm in charging other devices and of course only charge the non-essentials during the day! Remember you can't store sunshine so anything you generate that isn't used or stored is wasted.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.



    •   AltAdvertisment

        
       

  3. #3
    Super Moderator
    Points: 49,315, Level: 54

    Join Date
    Apr 2011
    Location
    Minneapolis, Minnesota, USA
    Posts
    12,221
    Helped
    2407 / 2407
    Points
    49,315
    Level
    54

    Re: Efficient battery charging on solar, at sea!

    It is better for appearances to arrange for all charging to be taken from the solar panel (in daylight). If anyone can draw juice from the battery (at night) then there are likely to be suspicions that 'the battery is getting drained' due to unneeded charging or to malfunctioning equipment, etc.

    Do you have a fuse on each outlet and each charging station? That would be a wise move considering it will prevent depleting the battery which could be essential in a crisis.



    •   AltAdvertisment

        
       

  4. #4
    Advanced Member level 5
    Points: 14,713, Level: 29

    Join Date
    Nov 2012
    Posts
    2,717
    Helped
    637 / 637
    Points
    14,713
    Level
    29

    Re: Efficient battery charging on solar, at sea!

    Once the battery is fully charged, all the power supplied to the battery is just waste. In addition, battery charging is also not 100% efficient.

    It may be wise to charge, as much as possible, directly from the solar charger (before it goes to the battery) and have an eye on the level of the battery charge status.

    It will also be wise to monitor the voltage, current and power used from each outlets. Any extra cost may be worth it.



--[[ ]]--