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    Thumbs up Reported Post by p38arover

    p38arover has reported a post.

    Reason:
    Move to Alternate Energies
    Post: Single solar panel simultaneously connected to 2 separate MPPT controllers
    Forum: General Chat
    Assigned Moderators: Bytemrk, Redback, Ranga, isuzutoo-eh, V8Ian, Homestar, Disco Muppet

    Posted by: towe0609
    Original Content:
    Hi - having trouble getting my brain around this one ... hope someone can help. I suspect its a silly question ... but I need to have my eyes opened.

    Question 1

    Situation: 80W panel permanenty mounted to roof of vehicle, and can be connected via Vitron 15A MPPT controller connected to starter battery.

    Slide on canopy with CTEK250S and 170Ah AGM, solar panels permanently mounted to canopy doors.

    I can manually switch the solar input of the Vehicle mounted panel between the Vitron to the CTEK but I'd rather it was set and forget.

    I have a WAECO CDF-11 fridge as centre console which is powered from starter when slide on is off, and from 170Ah AGM in canopy when slide on is on.

    The slide on MOSTLY stays on the vehicle, but I recently added the Vitron so when the slide on is off vehicle, the solar on the vehicle roof can charge the starter.

    Once isolated the CTEK250S doesn't provide charge back to the starter battery.

    What I'm wondering is how will the Vitron and CTEK250S behave if I connect the solar input to both controllers simultaneously?

    The main purpose of the solar is to keep the 170Ah battery in the slide on happy as it is powering the fridges, but it would be a bonus if the solar could be 'shared' with the Vitron to ensure the starter is maintained.

    I have had issues with the starter being drained if it sits for extended periods, so it always getting some solar charge would deal with (well mask it!) that as well.

    Question 2

    Will the Vitron blow a fuse if more than 15A of solar is supplied? The manual specifies "Max. PV short circuit current 15A" and "Nominal PV power, 12V (1a,b) 220W" with the note reading "1a) If more PV power is connected, the controller will limit input power." I'm not sure how to interpret all this.

    I understand it will only provide 15A of charge/load.

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    Yes.
    Cheers,

    Sean

    “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” - Albert Einstein

  3. #3
    p38arover's Avatar
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    Reported Item

    p38arover has also reported this item.

    Reason:
    Move to Alt Energy or Camping

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    p38arover's Avatar
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    Done
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
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