Inverter battery lights

Masterjoe
Masterjoe Registered Users Posts: 86 ✭✭
in Grid Tie and Grid Interactive Systems #1
So my XW4024 is showing 2green lights but the CC is showing 24.4V.  Why is it so different?  It is a snowstorm power is out and it is 29 degrees.  Also our 4.5KW system 18 250w panels has been producing .5KW for the last month and a half.  I’m thinking some fuses are bad at the panels.  Installer will not return my calls.  Thanks for the help.
4.5kw 24v System
18 Solartec 250w polycrystalline panels
Xantrex XW4024 Inverter/Charger
Conext MPPT 80-600 Charge Controller
12 Trojan L16G-AC 20 hour 390ah batteries tied in 3 strings at 1170ah total
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  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    edited December 2018 #2
    The two led on indicates between 23.8 and 24.6 volts so 24.4V is within this range. The production will reflect useage, the batteries will only accept what's needed any excess is wasted, the 0.5Kw seems very low however, or is it 5Kw? Snow storm, cloudy weather short days, unknown loads   ..............too many variables and not enough information to hazard a guess. 
    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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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #3
    If you have a generator, when you are able to comfortably do so, start it up and see if the batteries are taking a hefty charge after half an hour .
    0.5 kwh daily harvest seems quite low, unless the panels are covered in snow and ice.

    Do you have a combox or SCP to view logs of the system ?
    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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  • Masterjoe
    Masterjoe Registered Users Posts: 86 ✭✭
    #4
    Yes we have an SCP and I have been tracking it for 2 months same .5kw doesnt matter if its a crystal clear day or cloudy and raining.  Same time last year we were producing over 150kw per those 2 months now 52kw for Oct and 23kw for Nov.
    4.5kw 24v System
    18 Solartec 250w polycrystalline panels
    Xantrex XW4024 Inverter/Charger
    Conext MPPT 80-600 Charge Controller
    12 Trojan L16G-AC 20 hour 390ah batteries tied in 3 strings at 1170ah total
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #5
    Assuming you have pv string breakers (wired as 9 strings of 3?), you could try opening all the breakers, then close them one at a time to test each string individually. 

    I'd turn the controller off when opening/closing to avoid doing so with much current flowing.  If it's fuses, I'd cover the panels with a blanket or something as well.
    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
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #6
    Also "the CC is showing 24.4v" implies a single controller?  4.5kw seems like a lot of pv for a single controller.
    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
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #7
    Following on from post #6, does the CC have an internal cooling fan, and if so, is it coming on?  I'm wondering if maybe the CC is limiting output because it's getting too hot?
    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
    · Share on Twitter

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