Plug-in solar panel option

Discussion in 'OnBoard Electronics & Controls' started by Stuft, Nov 30, 2008.

  1. CDK
    Joined: Aug 2007
    Posts: 3,324
    Likes: 147, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    If you succeed in overcharging your battery with the panel you've described, you can probably walk on water too.
    I have a 16 Wp panel and 240 Ah of batteries, live in the sunniest part of Europe, yet the charge is only just sufficient to compensate for self-discharge, the bilge pump and 8 mA for the alarm system.

    In the past, I had a bilge pump with only a float switch: the panel could not cope with the power consumption. Pump and switch kept each other busy for hours because the back-flow of the water still in the hose was enough to switch the pump back on again.
    So I added an rc-delay and a transistor that keeps the pump going for approx. 10 seconds after the float breaks the circuit.
     
  2. Ratch
    Joined: Feb 2008
    Posts: 26
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Sydney

    Ratch Junior Member

    Hi CDK

    We started discussing overcharging the battery when Stuft decided to get a new panel.

    As things stand now:
    Battery size - unknown
    Panel size - unknown (was an old 5w)
    Pump size - 1.9amp@12v (googled make)
    Pump run time - guessing between 5-10min per day.
    Mooring location - Sydney or around there
     

  3. CDK
    Joined: Aug 2007
    Posts: 3,324
    Likes: 147, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    Thanks Ratch, I missed that. My 1200 m. telephone cable, hanging on poles under the power cable makes the internet very slow sometimes.
    Stuft mentioned 350 Amps for the battery: I guess he meant cranking current, so the capacity will be approx. 50 Ah.
     
Loading...
Similar Threads
  1. Squidly-Diddly
    Replies:
    2
    Views:
    699
  2. yipster
    Replies:
    5
    Views:
    2,861
  3. sdowney717
    Replies:
    0
    Views:
    3,586
  4. brian eiland
    Replies:
    0
    Views:
    60
  5. ProBoat
    Replies:
    1
    Views:
    548
  6. Vulkyn
    Replies:
    14
    Views:
    646
  7. Jonny3777
    Replies:
    3
    Views:
    788
  8. Vronsky
    Replies:
    22
    Views:
    2,031
  9. BertKu
    Replies:
    11
    Views:
    6,869
  10. Vulkyn
    Replies:
    54
    Views:
    4,370
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.