solar set-up for my barn

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  • T-Bone
    Junior Member
    • Mar 2010
    • 5

    #1

    solar set-up for my barn

    Hello everyone, I am a new user to this site. I found it researching for my first solar project, and it seemed like alot of people answer others questions with very informative answers! I hope to get some thoughts and ideas to help guide me with my project.
    I recently put together a small barn for our horses. Its an open air barn made from galvanized pipe and a corragated metal roof with plywood walls. it has 2 stalls on either end for our horses with a breezeway in the middle which is split in half. the front half of the breezeway is open and the back half is now enclosed to store the hay. Anyway, it needs light. one light in the hay room and one light in the breezeway. A big plus is that we will only need to use the light on average an hour a day. 2 hours tops maybe once a week.

    items i have: 1- 75watt solar panel, 1- 10amp 12v 120w charge controller
    2- 6volt golf cart batteries, 1- 300 watt inverter
    i get lots of sun. (sacramento) but also very high heat.

    this was my vision: 75w panel connected to my charge controller, connected to my 2 6volt batteries wired in series, connected to my inverter, then to a wall switch and then my 2 lights.

    for my lights i was thinking about screw in led's:
    "7 High Powered LED Medium Base PAR 30 bulb - 120/240 Light output comparable to 35~40 watt incandescent
    Consumes just 8 Watts of power VAC" but those bulbs are $50 each. would low(30max)watt CFL bulbs work ok?

    some questions are: 1.what type of light bulb would you choose? led bulb, cfl or flouresent?
    2.do i need a fusebox between my inverter and my light switch? if so, what size?
    3.what guage wire do i need to run this? I was told 4 guage, but that is so thick! seems crazy!
    4.do i even need an inverter? can i run lights off of DC?
    5.for this small system, is it even best to run it 12volts?
    6.could i add more light fixtures in the future if i stay within my panels max output?

    Well thats basicly what i got goin. If anyone has some advice for this solar greenhorn, all advice and suggestions would be much appreciated. thanks everyone
  • Mike90250
    Moderator
    • May 2009
    • 16020

    #2
    I would look inito some 12V LED bulbs, and save the losses inherent in an inverter. use 10 ga romex. Regular light switches. 1 fuse at the battery. LEDs consume less power than CFL bulbs. I just got one of these, and installed it in my light, and have been very happy with it in my office:

    It's a little circular circuit board, with 10 LEDS on it, and a current module on the back side.
    Attached Files
    Last edited by Mike90250; 03-10-2010, 02:19 AM.
    Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister

    Comment

    • Jason
      Administrator
      • Dec 2008
      • 990

      #3
      Welcome T-Bone

      Thanks for registering to ask your question!

      I'm going to move your thread to the "off grid" forum.

      Comment

      • T-Bone
        Junior Member
        • Mar 2010
        • 5

        #4
        thank you for the reply! do i put the fuse at the battery on the charge controller side or the inverter side?

        Comment

        • Mike90250
          Moderator
          • May 2009
          • 16020

          #5
          2 fuses, one on each cable (charge controller gets lower fuse - 5A, inverter gets 30A fuse) and the cables need to be rated for the fuse size on each one. Cables then both bolt to the battery terminal.
          Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
          || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
          || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

          solar: http://tinyurl.com/LMR-Solar
          gen: http://tinyurl.com/LMR-Lister

          Comment

          • Asunpower
            Junior Member
            • Mar 2010
            • 6

            #6
            I agree with Mike

            Comment

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