Fangspun mppt

st3v3st3v3 Registered Users Posts: 4
Hi, I have 3 x 180 watt 24volt Pv panels and would like a mppt, I have been looking at fangspun for one of these, can any of you guys recommend one of their pieces of kit, I am new to this and any advice is welcome.


  • littleharbor2littleharbor2 Solar Expert Posts: 1,557 ✭✭✭✭
    I can't say that I would recommend the brand. While I have no experience I can say that Fangpusun seems to copy many of the established brand solar charge controllers, at least on the surface. Internally I don't know. Maybe some member with working experience will chime in.

    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, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.

  • mike95490mike95490 Solar Expert Posts: 9,023 ✭✭✭✭✭
    It's a clone of another well know controller.  It's quality may be bad, or good, you pay your $$ and take your chances

    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

    gen: ,

  • BB.BB. Super Moderators, Administrators Posts: 31,068 admin
    One other generic set of questions... You need to match the Vmp-array with the Vpanel input rating and Vbatt output of the solar charge controller...

    If you have a 12 volt battery bank, then any reasonable connection on the solar array side would be OK. If you have a 24 or 48 volt battery bank, then you need Vmp-array to be, at least, 35+ VDC for a 24 volt bank, and 72 Volts Vmp-array or greater for a 48 volt battery bank.

    And you need to know the exact Vmp/Imp/Voc rating of the panels, and the input/output rating of the solar charge controller, and the rough location of the system... If very cold regions, Voc/Vmp increase (go up as panel temperatures go down), and can exceed the Vpanel input ratings.

    "24 volt" solar panels is not really enough information to go on... They could be Voc~24 volts and Vmp~18-20 volts, or Vmp~24 volts and Voc~36 volts, or Vmp~30 volts, or Vmp~36 volts, etc. All have been called "24 volt" panels. Details matter here.

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • softdownsoftdown Solar Expert Posts: 3,479 ✭✭✭✭
    I can only imagine the directions. 
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • petertearaipetertearai Solar Expert Posts: 446 ✭✭✭✭
    Here in NZ  , That brand is available along with the Outback one it is a copy of .....the price difference is such that i would personally not bother . And stick with the known brand and known backup .
    2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . Mate 3. victron battery monitor . 24 volts  in 2 volt Shoto lead carbon extreme batterys. off grid  holiday home 
  • st3v3st3v3 Registered Users Posts: 4
    Thanks guys, I will have a look when I finish work at the specs x 
  • st3v3st3v3 Registered Users Posts: 4
    hi, these are the specs of the 3 panels which I have, I was thinking of buying a mppt charger from china, fangpsun 100/50, to be honest I know very little about these, I live in the northeast uk , the panels are not permanently fixed, I have two large acid batteries. Any help in sizing a charger is very welcome 
  • EstragonEstragon Registered Users Posts: 4,478 ✭✭✭✭✭
    What nominal voltage will the batteries be wired for ? (eg 2 x 12v in series for 24v nominal or ?)
    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
  • st3v3st3v3 Registered Users Posts: 4
    Hi , yes 2 x 12 in series, 
  • westbranchwestbranch Solar Expert Posts: 5,183 ✭✭✭✭
    edited January 15 #11
    you will need to have  minimum of 2 panels in series  to properly charge a 24 V battery bank.  The CC will generate a lot of heat etc. if 3 in series is used for 24V bank.  Best to go for a name brand CC like MidNite Solar Classic or depending on size of bank a  KID (US) 
    Or there is Victron from Holland but I do not have any of their products..
    KID #51B  4s 140W to 24V 900Ah C&D AGM
    CL#29032 FW 2126/ 2073/ 2133 175A E-Panel WBjr, 3 x 4s 140W to 24V 900Ah C&D AGM 
    Cotek ST1500W 24V Inverter,OmniCharge 3024,
    2 x Cisco WRT54GL i/c DD-WRT Rtr & Bridge,
    Eu3/2/1000i Gens, 1680W & E-Panel/WBjr to come, CL #647 asleep
    West Chilcotin, BC, Canada
  • EstragonEstragon Registered Users Posts: 4,478 ✭✭✭✭✭
    2 panels in series into a 24v bank would be ideal, but 3 in series isn't bad.  If you don't expect to add more panels, something like a Midnite kid - 150v, 30a.  I wouldn't use a 100v controller, as I suspect NE UK could get cold enough for a ~90Voc string to overvoltage.
    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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