24v LED on 12v system? Possible?

Discussion in 'Self-Build Motorhomes' started by rolandsaven, Nov 28, 2018.

  1. rolandsaven

    rolandsaven Funster

    Joined:
    Mar 19, 2018
    Messages:
    16
    Ratings:
    +8
    I have a 12v system in my motorhome and planning on installing 24v LED strips, however, I'm unsure whether I would need an isolated or a non-isolated boost converter.

    I'll be using roughly 5 meters of LED (24W per meter).

    I would go for a non-isolated converter as this is not a critical application and we're only talking about direct current. However, I'd like somebody to confirm my thinking.

    So my questions.

    1. Isolated or Non-Isolated 12v to 24v Boost Converter? (Victron Orion)
    2. I might add a PWM Dimmer in the 24v circuit. Does that change anything?
    3. I do have 230V AC in my motorhome (from an inverter). Would it be a better choice of using a simple LED Driver that converts AC to DC?
    Thank you in advance
     
  2. eddievanbitz

    eddievanbitz Trader - Funster

    Joined:
    Oct 4, 2007
    Messages:
    4,948
    Location:
    Taunton Somerset
    Ratings:
    +22,874
    Cheapest would be to buy some 12 volt LED strips? both financially and from a power efficiency point of view.

    Loads available for not a lot of money on line(y)
     
    • Like it Like it x 1
  3. tonka

    tonka Funster Life Member

    Joined:
    Jul 2, 2008
    Messages:
    7,224
    Location:
    Cannock, Staffs or Benidorm, spain
    Ratings:
    +14,999
    WHY ???
    Just buy 12v LED strip it's not expensive.

    Any other way not only adds to the cost and complication but also increases the power consumption. (y)
     
  4. The Wino

    The Wino Funster

    Joined:
    Mar 23, 2012
    Messages:
    2,574
    Location:
    leicester
    Ratings:
    +6,872
    I'm just thinking why 24v too there must be a reason what is it? and why do you need 120w of led light about the same as 800w of old fashioned light bulbs are you taking on Blackpool as an attraction!!!!
     
  5. eddievanbitz

    eddievanbitz Trader - Funster

    Joined:
    Oct 4, 2007
    Messages:
    4,948
    Location:
    Taunton Somerset
    Ratings:
    +22,874
    I though the same, then thought that perhaps the OP had "acquired" them and wanted to try to use them.
     
  6. rolandsaven

    rolandsaven Funster

    Joined:
    Mar 19, 2018
    Messages:
    16
    Ratings:
    +8
    I'd like to use a led strip that is "no-spotting" or "seamless". So that there are no "black spots" when I look at it. There is not much distance between the LED and the actual plastic diffuser in the aluminum profile. (couple of mm) So an average LED strip reminds me of a Christmas tree... Therefore, I need something that comes with a very short distance between the LEDs and I'm guessing at least 240LEDs per meter. I could not find one that is 12V unfortunately.... Others ideas are welcomed.
     
  7. The Wino

    The Wino Funster

    Joined:
    Mar 23, 2012
    Messages:
    2,574
    Location:
    leicester
    Ratings:
    +6,872
    Is it dimmable if not you could need sunglasses all the time!!!
     
  8. Richard and Ann

    Richard and Ann Funster

    Joined:
    Jan 19, 2014
    Messages:
    1,912
    Location:
    Derbyshire
    Ratings:
    +5,040
    If there's an even number of strips, wire them in pairs in series :cool:
     
    • Like it Like it x 1
  9. Two on Tour

    Two on Tour Funster

    Joined:
    Sep 16, 2016
    Messages:
    1,909
    Location:
    Near the junction of the A14 and A1, Cambs
    Ratings:
    +6,366
    Have a look at what these guys have got to offer. looking at the LED spacing on there images of the LED strips I would think it is not physically possible to fit 240 LED's per metre.

    https://www.ledkia.com/uk/24-buy-led-strips
     
  10. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    30,765
    Location:
    Macclesfield
    Ratings:
    +41,042
    No problem. Cheapest non isolated one that fits the bill.
     
    • Nice One! Nice One! x 1
  11. Wissel

    Wissel Funster

    Joined:
    Sep 16, 2013
    Messages:
    1,002
    Location:
    Cornwall
    Ratings:
    +1,841
    • Nice One! Nice One! x 1
  12. rolandsaven

    rolandsaven Funster

    Joined:
    Mar 19, 2018
    Messages:
    16
    Ratings:
    +8
    I know it'll be bright but do you think it will be that bright? It is sooo difficult to choose such thing from the web...
     
  13. rolandsaven

    rolandsaven Funster

    Joined:
    Mar 19, 2018
    Messages:
    16
    Ratings:
    +8
    Thanks for the site, I'll look at their products.

    Well, there are not many around for sure. This is the one that I was looking at. (see link below) It is pretty much spotless but it might be too much as you guys are saying. Can't decide though...

    https://www.ledspace.co.uk/products/prostrip240-5800k-20w-m-2835-led-strip-24v-per-metre
    https://www.maxiluxled.com/products/pdf/152
     
  14. Two on Tour

    Two on Tour Funster

    Joined:
    Sep 16, 2016
    Messages:
    1,909
    Location:
    Near the junction of the A14 and A1, Cambs
    Ratings:
    +6,366
  15. rolandsaven

    rolandsaven Funster

    Joined:
    Mar 19, 2018
    Messages:
    16
    Ratings:
    +8
    Thanks, that is great to hear that I don't have to go with the expensive ones. I was afraid that they might just blow up/overheat/catch fire. Definitely not something I'd like in the van.

    Other than the Victron Orions, I was also looking at this model but I don't really know what case I would make for it. Something like this might better fit the purpose.

    Also, do you think guys should I go stepping up 12v DC to 24 DC or stepping down 230v AC to 24v DC?
     
  16. The Wino

    The Wino Funster

    Joined:
    Mar 23, 2012
    Messages:
    2,574
    Location:
    leicester
    Ratings:
    +6,872
    Im no lighting engineer but know a bit. As a general rule 10w of LED are equivalent to 100w of ordinary old fashioned bulbs so yours at 120w total will be the same as 12 100w bulbs in a motorhome!!!!!. I think each meter of the ones you are looking at are the equivalent of a 5' fluorescent like a lot of people used to have in their kitchen.
     
  17. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    30,765
    Location:
    Macclesfield
    Ratings:
    +41,042
    That looks "proper job" and easy to mount.

    No way do you want to start at 240V, you don't have 240V a lot of the time. You certainly don't want to be running an inverter continuously for lighting.
     
    • Like it Like it x 1
  18. Wissel

    Wissel Funster

    Joined:
    Sep 16, 2013
    Messages:
    1,002
    Location:
    Cornwall
    Ratings:
    +1,841
    Agree with @hilldweller - looks ideal.

    It has a variable input of 9v-20v and delivers 24v, plus rated at 10A.

    I'd order that if looking to do the same.
     
    • Nice One! Nice One! x 1
  19. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    30,765
    Location:
    Macclesfield
    Ratings:
    +41,042
    When I wrote " don't go 240V" I nearly added "unless your name is Wissel". Though even you probably stick to 12V for lighting.

    Now Mr Wino has thrown a spanner in the works, so much light he will get a tan. Question is, are 24V dimmers readily available.

    I have to say, going 24V is adding potential problems to a very simple system. 12V available easily, I doubt 24V are.

    PS: I see that ToT has posted 24V dimmers, I stand corrected. They are very neat too.
     
    • Like it Like it x 1
  20. Wissel

    Wissel Funster

    Joined:
    Sep 16, 2013
    Messages:
    1,002
    Location:
    Cornwall
    Ratings:
    +1,841
    :) Yep, still 12v lighting and most other things.

    240v is just the fridge, PC, monitors, Type C chargers, router, printer, Tassimo - actually quite a bit :)

    It's really not as mad as it sounds. Think once more adopt LiFePO4 it will become more normal. Especially with full timers who use a lot of electrical gear for work etc.
     
    • Like it Like it x 1

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice