DIY Solar panel setup on a budget

Discussion in 'Hobby Engineering' started by Mathuisella, Oct 15, 2013.

  1. Juggs

    Juggs Member

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    give the dog plenty of shade and access to cool water that isnt left in the sun and it will be fine
     
  2. 1shot1kill

    1shot1kill Member

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    A guy in Melbourne was recently selling 6V 130ah batteries on Gumtree. The last I saw, he had 36 available.

    If I had $1200 laying around, I'd grab them because 32 of these would make a nice 48V battery bank for my next solar power system.

    Edit: I think I can do this. I've just put a deposit on 32 batteries @ $30 each and I'll try to get to Melbourne next week to pick them up.
     
    Last edited: Apr 7, 2016
  3. 1shot1kill

    1shot1kill Member

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    So Friday and Saturday was a 1,000km road trip with about 650kg of batteries in the ute. And a couple of brass radiators.

    I cashed all that in for $380 and then went and bought 32 6V 130ah deep cycle batteries for close to a grand. Yes, they're second hand.

    My major project for the shack for this year is to rearrange the shed, put some more cladding on the outside, get some racking and get this battery bank set up. This is enough batteries for 520ah @ 48V.

    My normal usage is about 1.2kWh per day Mon-Fri when I'm not at the shack and about 3kWh per day on the weekends when I'm here. I think I've got just about enough batteries now.

    So far, this battery bank has cost me just under $1,000. Once I've got these set up, then I can sell my 24V battery bank for scrap.

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  4. Recharge

    Recharge Member

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    Wow! Very NICE! so jelly :/
     
  5. hoopstar

    hoopstar Member

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    Nice.

    Question: Do AGM batteries need to be kept off the ground??
     
  6. Recharge

    Recharge Member

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    I don't see why they would.
    probably better on the ground, heat will absorb from them through it.
     
  7. 1shot1kill

    1shot1kill Member

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    It helps. I'll be building a steel rack/cupboard to house these in.
     
  8. Symon

    Symon Castigat ridendo mores

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    No they don't. Old wives tale.
     
  9. rainwulf

    rainwulf Member

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    No. It was only true with OLD OLD batteries that where made out of slightly porous materials, and if left on a floor, the acid would pool under the cells and short them out.

    In a warm environment, the floor is often the coldest, and the BEST place for batteries.
     
  10. Alby1976

    Alby1976 Member

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    Not leaving the battery on the floor originated from very early batteries, that were in a 'glass jar' of sorts, and in a wooden case or cage.
    If they were left on the floor, the wood would absorb the moisture and swell, cracking the glass, and leaking the acid.

    Google glass farm battery

    They have evolved a fair bit, but can be just as dangerous if mistreated.
     
  11. RobRoySyd

    RobRoySyd Member

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    Best reason to leave them on wood like that is it makes them easier to pickup as you can get your fingers underneath them.
     
  12. 1shot1kill

    1shot1kill Member

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    I've still got a lot of work to do, not to mention money to spend. Fuses alone are going to cost me close to another $500.

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  13. Recharge

    Recharge Member

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    I'd be insulating the inside of that tin if I were you.
    keep the radiated heat from the sun to a minimum .
     
  14. aXis

    aXis Member

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    Is it just me or do a lot of the the batteries look a bit crooked? A sheet of plywood under there may help spread out the load on the thin wire racking.


    In other news, I had a power outage on Monday and whilst the rest of the house was off, my server closet UPS kicked along for another 2 hours until it was repaired. Solar was producing 25W (poor weather), I was consuming about 60W, and there was still plenty of capacity left in the daily cycle solar batteries before it even had to switch to emergency reserve batteries.

    Was quite amusing to be watching netflix over wifi during the outage :)
     
  15. 1shot1kill

    1shot1kill Member

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    The sun don't shine on that side. :thumbup:

    It's not just you. I've got three lengths of 50mm angle iron running across each shelf underneath the wire.
     
    Last edited: Apr 26, 2016
  16. MyDixiesNormous

    MyDixiesNormous Member

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    How do you go about buying from that site? Im looking at putting together a simple setup for a camper trailer I have and want to keep the costs to a low level. I already have a salvaged panel and a agm battery.
     
  17. lionman

    lionman Member

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  18. 1shot1kill

    1shot1kill Member

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    Just what the doctor ordered. 6.5 metres of 25x3mm (better than 2/0 AWG) copper bar for $27.50. My only problem is that when I got it I forgot about my other set of batteries that I have to link up, so I'll call in on Friday and get some more.

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  19. Recharge

    Recharge Member

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    http://www.aliexpress.com/store/pro...440.182.q0c0Eo&sdom=101.429.489.0_32573397454

    :0 this looks like a nice little unit!

     
  20. 1shot1kill

    1shot1kill Member

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    I might just have to get some.

    Edit:
    I did some weight lifting today, about 1.5T all up. I took the batteries off the shelves then I changed the height of the bottom two shelves. When I put it all back together I made sure the angle iron brackets were evenly spaced, then I put the wire shelving back on and added three lengths of merbau to sit the batteries on. Now there's no sag at all.

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    Last edited: Apr 30, 2016

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