Upgrading to lithium

Jcrabtree
Jcrabtree Registered Users Posts: 24 ✭✭✭
edited August 2019 in Solar Beginners Corner #1
Need help understanding difference between Battle Born & Simplphi.

1C compare 2.5
48v system now with L16

Simpliphi        48v 69ah $2890 @altestore
12v-4Battle born.    48v  100ah $ 4k 
24v-2.         "              48v   50 ah  2k

Which the best way to go.  We using it @ offgrid site, was alrdy set up to 48v before we bought it .
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  • Photowhit
    Photowhit Solar Expert Posts: 6,006 ✭✭✭✭✭
    edited August 2019 #2
    You might figure your total amphours, 

    Currently you have L16, (1 string?)and at birth they had roughly 340 ah at 48 volts or roughly 340ah x 48 volts = 16,320 watt hour of which you could use 50% or so without much fear of damaging the batteries, or about   8,160  watt hours. L16s should run roughly 250 per 6 volt battery  x   8 =   $2000

    Simpliphi have 69 ah at 48 volts or 69ah x 48 volts =3312 watt hours of which 85% is usable without fear of damaging the battery or about 2815 watt hours.

    Battleborn  have 100ah at 48 volts  for about 4800 watt hours of which 85% is usable  for about 4100 watt hours is  usable.

    I'd suggest  2 strings of the  Battleborn 100ah or 3 strings  of the SImpliphi 69ah would give you roughly the same amount of usable storage, hopefully for many extra years.


    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Magnum MS4024, Prosine 1800(now backup) and Exeltech 1100(former backup...lol), 660 ah 24v Forklift battery(now 10 years old). Off grid for 20 years (if I include 8 months on a bicycle).
    - Assorted other systems, pieces and to many panels in the closet to not do more projects.
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  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    #3
    Battle Born are drop in replacement type each with their own built-in BMS, Simpliphi is an engendered system with a single BMS designed to work in conjunction with certain systems like Schneider and Outback, but could be used with others. The other option is to build a DIY bank with prysmatic cells which is significantly less expensive, understanding the limitations of lithium batteries particularly regarding  low temperature will apply to any selection. Performance wise they are an excellent choice surpassing lead acid in almost every aspect.
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery with Battery Bodyguard BMS 
    Second system 1890W  3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.  
    5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
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  • Jcrabtree
    Jcrabtree Registered Users Posts: 24 ✭✭✭
    #4
    Thx for the info. Have been checking out those prysmatic cells as well. 
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