24......2 volt trojan L16 Xantrex xw I/C and 2 80 600's

mosierpatmosierpat Registered Users Posts: 4
I want to upgrade the battery bank from 24 - 2 volt trojans to something way better for free...!  Can I get it in Lithium please?
Ok, so that wont happen but I'm looking for best choice upgrade.  schneider xw Chg/inv and dual 80-600's   backup generator , need new batteries. 

Comments

  • EstragonEstragon Registered Users Posts: 3,968 ✭✭✭✭✭
    What "better" are you looking for.  There are pros and cons to all the various options.  None are "best" for every application (and budget).
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • mosierpatmosierpat Registered Users Posts: 4
    agreed.    lithium vs agm vs wet cell at various voltages that work with the listed equipment.   Im still in a semi-fledgling state of my research
  • mosierpatmosierpat Registered Users Posts: 4
    The owner is hands on for sure, knows how to work a hydrometer and add water.  He is tired of it so less maintenance is on his list i am guessing, but he is conditioned to work hard at it.  Looks like the money is there for lithium but it has to live a long time for the added expense. some sort of proof, or knowledge of the best way to go.  This is where my experience tapers a bit.  
  • EstragonEstragon Registered Users Posts: 3,968 ✭✭✭✭✭
    Lithium really hasn't been used long enough by enough people off-grid for there to be enough real-world experience to say with confidence that cycle-life claims etc are or aren't close to reality imho.  

    One thing to consider that isn't often mentioned for off-grid is while lithium can be cycled deeper (and is actually happier at partial SOC), when it gets low, it's lights out.  With L.A., you can get away with the odd deeper discharge in a pinch.  Having 50% in reserve by design can keep the lights on when the genny won't start.  With a lithium tool, you can just swap a new battery in if it dies in the middle of drilling a hole.  They don't seem to give much warning. 

    Lithiums also like temps humans like.  Too hot, research I've read from E.V. applications suggests significant cycle life reduction.  Too cold and charge rates need to be throttled and/or battery heated.

    When the time comes for me, I'm sort of considering whether some sort of hybrid lithium/LA bank could work.  A smallish lithium segment would handle most day-to-day requirements, with a mostly floating LA bank in reserve.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • icarusicarus Solar Expert Posts: 5,248 ✭✭✭✭
    Always try to consider in your economic analysis the value of the scrap batteries in the recycling market.  FLA have. Considerable scrap value, somewhere ~10-20% of initial cost.  Not an insignificant number when   Trying to figure out net lifetime costs.  Tony
  • PhotowhitPhotowhit Solar Expert Posts: 4,996 ✭✭✭✭
    mosierpat said:
    I want to upgrade the battery bank from 24 - 2 volt trojans to something way better for free...!  Can I get it in Lithium please?

    ...need new batteries. 
    Not sure if I can follow you, you speak in the 3rd person later on...

    You  say you need new batteries, I guess you have seen a reduction of usable capacity?

    Have you done maintenance and/or corrective equalizing? How old are the batteries? Are you running a balanced system?

    While there are always 'something new' on the horizon. If they are functioning, I might consider taking the time to analyze your system and perhaps limp the batteries through for a couple years.  I'm reading a lot about new tech coming on line soon. Dyson introducing a new electric car with solid state batteries. As well as several other solid state batteries in the works. If nothing else this should put pressure on the current lithium manufacturers to reduce the expense.
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, 660 ah 24v ForkLift battery. Off grid for @16 of last 17 years. Assorted other systems, and to many panels in the closet to not do more...lol
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