Newbie needs help 😁

dazza159dazza159 Posts: 4Registered Users
Hi, I have two 100w (wired in series) solar panels, two 12v 105ah AGM batteries (parallel) on the EPEVER MPPT charge controller do I use the gel battery setting?



  • littleharbor2littleharbor2 Posts: 1,072Solar Expert ✭✭✭✭
    edited July 10 #2
    Sealed battery setting. Or better yet get the recommended charging and float settings from the batteries and use custom settings on the controller, if you have them. Bulk and absorb are generally one in the same.  Bulk will bring the discharged battery up to the setting voltage then hold it there for the battery to absorb current till timed out or current decreases to a minimal percentage of the ah. rating of the battery. In your case, for example, 2% of 210 ah.  = 4 amps. Then transition to float.

    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.

  • dazza159dazza159 Posts: 4Registered Users
    Thanks for getting back to me. I've set the controller to the sealed setting. I'm guessing when the battery gets to 100% the controller will throttle back and just keep them ticking over?

    See, told you i was a newbie.
  • mcgivormcgivor Posts: 2,314Solar Expert ✭✭✭✭✭
    That's about it in a nutshell, the ticking over is the float voltage, to cover any losses, but having said that if there are any loads whilst in float greater than the array can provide, it will eat into the battery capacity, it's a ballance one needs to study over time, no two systems are identical.
    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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