combine solar panel wirh batteries

At last got 500w 48v solar panels  and 8 12v 250 ah solar batteries now a 48v battery pack

Have a 5.5kw continiuos  hybrid  inverter also 48v


First would like to know how to connect to form  the 48 v panels to stay with the 48v.


would like advise

Robert

Comments

  • BB.BB. Super Moderators, Administrators Posts: 30,052 admin
    Need exact Vmp and Imp of panels. And exact brand/model/type charge controller.

    Rough min and Max temperatures for your area would help.

    Length of cable run from array to charge controller.

    How many 500 watt panels.

    Mix and match work any existing panels?

    Etc.

    Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • mike95490mike95490 Solar Expert Posts: 8,613 ✭✭✭✭✭
    Generally, for a 48V system, you will need at least 2, and often 3 panels in series, you want to feed a MPPT controller about 80 or 90V, so it can do it's downconversion.  And it's likely you will need a 150V rated controller, because in cold weather, 90v of panels can produce 120V open circuit before the controller starts up.  A 100V controller would be fried.
    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 ,

  • robocoprobocop Registered Users Posts: 61 ✭✭
    Hi mike  some info   each panel is 500w vmp 58,95 imp 10,87 voc 48.63 isc 10.28  max fuse 15a operating temp -40 to +85c
    battery is gel battery 12v   8 pcs  so far I know can make 48 v 500ah  in 2 packs

    inverter is  a 5,5kw continius hybrid  must ph1800   max batt discharge is 150a  charging 60a

    do have all components to begin to install  , have also 2 extra 500w panels

    if more inf needed let me know  this is Caribbean  temp is abot 30-34 C sometimes under 30 C

    thnks for reading
    Bob

  • BB.BB. Super Moderators, Administrators Posts: 30,052 admin
    Do you have a link to the inverter/solar charger?

    And it looks like you have Vmp/Imp values swapped with Voc/Ioc.

    Looking for min/max Vpanel input voltages. Usually Vmp 72 volts or over... And if you have Voc over 140-150 volts is common.

    To panels in series (and a bunch of strings on series (each parallel string with a series fuse or breaker in a combiner box) should be ok.

    Details matter.

    Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • robocoprobocop Registered Users Posts: 61 ✭✭
    hi bill       each panel is 500w vmp 58,95each panel is 500w vmp 58,95V  imp 10,87A voc 48.63V  isc 10.28 A
  • EstragonEstragon Registered Users Posts: 4,451 ✭✭✭✭✭
    Spec open circuit voltage (Voc) is always higher than voltage at max power (Vmp) because voltage drops as the panel warms in the sun.

    In sizing strings, you need to adjust Voc (~59v?) up to adjust for the record low temperature at your location so the string voltage won't be higher than the controller max input voltage.

    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
  • BB.BB. Super Moderators, Administrators Posts: 30,052 admin
    Robocop,

    If you can also link to the inverter-solar-charger product/specifications/manual, that would help... Really need to mix/match everything together. I.e., the array operational voltage range needs to match both the inverter's Vpanel input range, and (many times) the battery bank voltage too (12/24/48 volt all usually have different minimum array voltages).

    I don't know anything about your inverter-solar-charger product.... Need the details.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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