XW inverters in closed loop charge control issues

moosemountain
moosemountain Registered Users Posts: 9 ✭✭
in Grid Tie and Grid Interactive Systems #1
I recently updated my XW system. Went from two XW+ with two MPPT 80-600 CC to two XW Pro and an Insight Home. I have a closed loop configuration with 4 Discover Battery AES  modules. They have a chip in the BMS to control the entire Xanbus network. I was off grid until two years ago. I've struggled with an issue all along of the system constantly charging and discharging the battery at the top of it's range. If I don't set a sell block schedule it will charge and sell from the grid at night. I was hoping that the Pros and Insight feature of SOC rather than voltage control would fix this but I'm still tinkering with settings to try to rein it in. Of course the partnership between Schneider and Discover created the perfect situation for crossfire finger pointing. Now, calling Schneider for help creates a language barrier that makes me miss the old days. I have a past client recently grid tied too, with different batteries, who is reporting similar observations so I'm not sure it is just the closed loop situation. Has anyone else run into this and found the sweet spot in the configuration?

Thanks.


· Share on Twitter

Comments

  • EDS
    EDS Registered Users, Users Awaiting Email Confirmation Posts: 1 ✭
    #2
    It's a know problem with the XW pro. A software bug probably, thats why they are phasing out of it and coming up wit new systems.
    One thing you can try is to set the grd support V to the MPPT float. Still enable sell block at night .
    You can try disabling XW charger if you can , but the cycling will still be happening, although at reduced rate
    · Share on Twitter
  • Dave Angelini
    Dave Angelini Solar Expert Posts: 6,966 ✭✭✭✭✭✭
    #3
    What FW in xw and home?
    Ah the grid and XWP.  None of this happens offgrid!  Read the release notes.

    Discover has 2 types of firmware in the rack, one is BMS controlled and one is xanbus controlled.
    Maybe Discover can help you but the 6650, is that what you have? is going to be an issue on grid unless you can fine tune it. 

    There are some other workarounds I use. Good Luck!
    "we go where power lines don't" Sierra Nevada mountain area
       htps://offgridsolar1.com/
    E-mail offgridsolar@sti.net

    · Share on Twitter

Categories