Inverter not starting

Hi folks,

Required technical advise.

we installed the 10 MW Solar Power Plant in Morocco. inverter is not starting at morning time when even radiation required level?. please advise to troubleshoot this issue. for more claification find below information.

1. site has high relative humidity its around 93%
2. PV panels are cleaned
3. plant is tracker type. tracker starting at 8:30
4. inverter make is ingeteam and starting at 10:30 when radiation is more than 200 w/m2

Comments

  • mike95490mike95490 Posts: 7,902Solar Expert ✭✭✭✭
    I'd advise you to call the installer / dealer / vendor / Mfg. 
    How old is the gear?  do logs show any degradation in the days/weeks before the failure ?
    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

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

  • vsrenergyvsrenergy Posts: 4Registered Users
    mike95490 said:
    I'd advise you to call the installer / dealer / vendor / Mfg. 
    How old is the gear?  do logs show any degradation in the days/weeks before the failure ?
    Hai Mike,

    its newly commissioned plant. we are facing this issue in commissioning. showing isolation fault. whether high moisture will affect the circuit?
  • petertearaipetertearai Posts: 348Solar Expert ✭✭✭
    Hi humidity should not a affect  an installation , except posibly, after some time  . Water ingress will of course be  a problem . 
    Are  you the installer ?  
    Posting a list of the equipment you have installed will help get reply that may be of some use . 
    2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . victron battery monitor . 24 volts 450 ah surette batterys . off grid  holiday home 
  • EstragonEstragon Posts: 2,839Registered Users ✭✭✭✭✭
    It seems to me that at 93% humidity it wouldn't take much of a temp change for condensation to form and bad stuff to happen.
    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
  • EstragonEstragon Posts: 2,839Registered Users ✭✭✭✭✭
    I'm guessing the installation is coastal with that sort of humidity, basically a saltwater fog. In lower overnight temps, the fog condenses on wiring and components. In higher daytime temps, the water evaporates off, leaving a salty crust behind. The next night brings more salt fog, and more salty deposits. Eventually, you get enough condensation and enough salt to make a good short circuit.
    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
  • vsrenergyvsrenergy Posts: 4Registered Users
    Estragon said:
    I'm guessing the installation is coastal with that sort of humidity, basically a saltwater fog. In lower overnight temps, the fog condenses on wiring and components. In higher daytime temps, the water evaporates off, leaving a salty crust behind. The next night brings more salt fog, and more salty deposits. Eventually, you get enough condensation and enough salt to make a good short circuit.
    I'm partially agree with your point. if it is positive, what will be solution. please guide.

  • vsrenergyvsrenergy Posts: 4Registered Users
    Hi humidity should not a affect  an installation , except posibly, after some time  . Water ingress will of course be  a problem . 
    Are  you the installer ?  
    Posting a list of the equipment you have installed will help get reply that may be of some use

    inverter - ingeteam power max 1164 kw
    module - astronergy
    SMb- trinity touch india


  • mcgivormcgivor Posts: 2,205Solar Expert ✭✭✭✭✭
    edited August 26 #9
    An Isolation fault would likely have to do with the transformer that provides galvanic isolation from the grid.
    Do you feed into a transformer before the grid?
    Humidity rating of the unit is 95% non condensing

    Below is an excerpt from the manual.

    These units are equipped with the necessary filtering elements to comply with EMC requirements for industrial 
    applications in order to prevent disturbances in other equipment outside the installation.
    All of these units are connected to the grid through a low to medium voltage transformer. This transformer gives 
    the unit galvanic isolation that affects its good performance in terms of noise emission (see Section “7.6.1. Grid 
    connection transformer”). This is why: 
    Any auxiliary element must be connected to the low voltage network powering the units via a galvanic 
    isolation transformer (see Section “7.6.2. Auxiliary transformer”)
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery bank 

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