System not drawing enough power from battery bank, so most power needed for loads comes from grid

TheVillagesGuyTheVillagesGuy Posts: 10Registered Users ✭✭
I have a Conext SW 4048 inverter/charger AC coupled to an Enphase micro inverter (AC output) solar system. They are coupled at a critical load panel. No matter how I adjust the settings, the fully charged battery bank only produces a tiny part of the load draw. If the load draw is say 1,500 watts, the inverter/charger will only take 13-87 watts from the batter bank and the rest is being pulled from the grid...EXACTLY WHAT I DON'T WANT. The point of this system is to charge the batteries during the daylight and them power as much as possible from the batteries at night....yet no matter how I adjust the settings, I barley get more than a trickle contribution from the batteries.

Please help.
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Comments

  • PhotowhitPhotowhit Posts: 4,450Solar Expert ✭✭✭✭
    I guess I'm confused about what you are trying to do, you say you want to,

     The point of this system is to charge the batteries during the daylight and them power as much as possible from the batteries at night....
    ...but that would cost you more than if you just used the grid. If you draw down your batteries at night you will just have to recharge them the next day, you lose energy because it take more energy to recharge the batteries than to just run from the grid.

    If you really want to do this, just turn off the breaker to the grid.
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, ForkLift battery. Off grid for @13 of last 14 years. 1000 watts being added to current CC, @2700 watts to be added with an additional CC.
  • mcgivormcgivor Posts: 1,549Registered Users ✭✭✭✭
    Unless the grid is very expensive at night, there would be no need to use battery power because it cannot compete with the grid. However if the grid has peak billing between certain hours, it may be advantageous to program load shaving for those hours, but other than that there would be no benefit.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • jonrjonr Posts: 931Solar Expert ✭✭✭✭
    edited February 26 #4
    Maybe "self-consumption mode" that is briefly mentioned in the XW manual?

    The Tesla Powerwall 2.0 has a mode that does that. 
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