vision 6fm200s-x battery

petertearaipetertearai Solar Expert Posts: 398 ✭✭✭✭
A friend has been offered these batterys 2nd hand 5years old.from a ups .very cheep.Are they suitable for off grid system?
Regards
Peter
2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . victron battery monitor . 24 volts 450 ah surette batterys . off grid  holiday home 

Comments

  • BB.BB. Super Moderators, Administrators Posts: 29,518 admin
    Re: vision 6fm200s-x battery

    5 years is typically a long life for AGM's installed in a UPS system.

    Although, according to their specifications (PDF), they have a 10 year life if operated at 20C/68F. If the batteries have been in a warm room/hot equipment, at 30C they only have a 5 year life.

    For AGM's, a typical failure is corrosion of the catalyst required to recombine the Hydrogen and Oxygen. Once the catalyst is gone, the batteries vent and the electrolyte dries out. Replacing the catalyst does not appear to be cheap (typically something like platinum or similar expensive metal).

    Compare the price you can purchase the batteries for and how much it will cost (or how much you may get from recycling) for them. The batteries do not appear to have Cadmium or other materials that makes recycling expensive--but check to be sure.

    If the price and transportation costs are cheap--It may be worth at least trying them. If they last you a few years, you should be happy.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • nielniel Solar Expert Posts: 10,311 ✭✭✭✭
    Re: vision 6fm200s-x battery

    buying 2nd hand batteries is a risk and you may get stuck paying to dispose of them if they fail so i would not offer much for those 5yr old batteries that may be at the end of their expected life.
  • petertearaipetertearai Solar Expert Posts: 398 ✭✭✭✭
    Re: vision 6fm200s-x battery

    Thanks for your replys. $80 nz . From a temp controled room. Will let my friend know your thoughts.
    Regards Peter
    2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . victron battery monitor . 24 volts 450 ah surette batterys . off grid  holiday home 
  • mike95490mike95490 Solar Expert Posts: 8,380 ✭✭✭✭✭
    Re: vision 6fm200s-x battery

    5 year old UPS batteries are about dead. I suspect they won't last long when you start to cycle them. UPS batteries are only spec'd for a couple of cycles, not daily cycles.
    Powerfab top of pole PV mount | 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

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