Outback Charge Controller Trips Off

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sophialeilani
sophialeilani Registered Users Posts: 1 ✭
in Off Grid Solar & Battery Systems #1
I just bought three new simpliphi batteries to replace my old lead acid batteries and ever since installation my outback charge controller has been tripping off regularly. We never had this problem before and have not changed anything else about the system. Any thoughts?
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
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    Is it shutting off from over voltage or overcurrent or overheat ?

    What are your new batteries rated to be charged at ?  Li is much more demanding of tight voltage tolerances then lead acid
    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

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    edited January 2021 #3
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    LFP batteries will accept all available current until fully charged, which may prompt an over current or over temperature fault of the charge controller, assuming  the array is oversized, settings are important, nothing is mention regarding them and they differ vastly from lead acid.

    Without this information it's impossible to suggest what, why or if, there is a problem that is causing the issues being experienced.

     
    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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  • boB
    boB Solar Expert Posts: 1,030 ✭✭✭✭
    #4
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    Yes, the Simplifi may be turning OFF abruptly because it is going over-voltage and protecting itself ?  What is the Absorb set-point voltage on the charger and what is the voltage limit of the Simplifi ?
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  • JRHill
    JRHill Registered Users Posts: 280 ✭✭✭
    #5
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    Yup, the above ^^. It is said SimpliPHIs are a drop in replacements for FLAs and that is kind'of true. But they require different parameters for charging and discharging. And that stuff is really important to get correct. Without knowing what equipment you have and the charge controller settings its impossible to give more help.
    Off Grid. Two systems: 1) 2925w panels, OB VFXR3648, FM80, FNDC, Victron BMV-712, Mate3s, 240 xformer, four SimpliPHI 3.8; 2) 780w, Morningstar 30a, Grundfos switch, controller and AC/DC pump, 8 T105. Honda EU7000is w/AGS. Champion 3100. HF 4550, Miller Bobcat.
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