Battery problems

higgins52
higgins52 Registered Users Posts: 2 ✭
in Off Grid Solar & Battery Systems #1

Hi

running an off grid system with a mpp inverter.everything is fine but only charging half my battery bank

any idea s

thanks

· Share on Twitter

Comments

  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    #2

    Welcome to the forum

    You will need to provide additional information, battery configuration, number of strings, equipment used and so forth, in order to get useful feedback.

    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.
    · Share on Twitter
  • higgins52
    higgins52 Registered Users Posts: 2 ✭
    #3

    battery configuration is 48 volts

    8 battery s

    running into mpp inverter

    · Share on Twitter
  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    #4

    Still not much to go on, 8 batteries in series? assuming 6V for 48V nominal, running into a mpp inverter? Take the time to explain what the system consists of, in detail, without which its extremely difficult to even begin, kind of like going to the doctor and saying I'm sick, the doctor will begin by asking questions.

    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.
    · Share on Twitter
  • BB.
    BB. Super Moderators, Administrators Posts: 33,641 admin
    #5

    And what you do mean by saying it only charges 1/2 your battery bank? You have two parallel strings of batteries? Or are you saying the system only charges your batteries to 50% state of charge?

    Please feel free to use as many words as you need. We are not pressed for space like you would be in a text message. Right now, the forum is configured for a 15,000 character limit (around 3,000 words or 1.5 pages of typing).

    -Bill

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
    · Share on Twitter
  • DaangeroussDan
    DaangeroussDan Registered Users Posts: 23 ✭✭
    #6

    you probably did not hook it up right, or one bank (if parallel) is corded. Make sure your charge controller hooks to one side of each parallel bank positive and the complete opposite side (farthest from positive) negative of each parallel bank string. Like this https://www.youtube.com/watch?v=v0eztArZsBE

    Make sure to use "battery anti corrosive " on all connections and that the cables are all the same gauge and length. Ohms law dictates the path of least resistance is critical to equal charging.

    · Share on Twitter
  • littleharbor2
    littleharbor2 Solar Expert Posts: 2,113 ✭✭✭✭✭
    #7
    https://forum.solar-electric.com/discussion/comment/396908#Comment_396908

    These continual references to YouTube and eBay as well as bad advise is going to get you a timeout.

    2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old  but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric,  460 Ah. 24 volt LiFePo4 battery bank. Plenty of Baja Sea of Cortez sunshine.

    · Share on Twitter

Categories