Announcement

Collapse
No announcement yet.

Multi MPPT To Single Battery Bank?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Multi MPPT To Single Battery Bank?

    My woodworking shop is equipped with 12 12v DC Batteries & catches the overrun from the house which runs off hydro and wind.

    As my projects are increasing in power needs I'm going to add solar panels as well.

    I already have an MPPT CC in place for the overflow output and wondering if it's acceptable to simply drop a second MPPT CC for the solar panels right onto the same battery bank or if I'll need to split my battery bank between the controllers and then link the split banks back together with isolation diodes. My current CC only has two inputs and also is not rated high enough for the addition of the solar panels. Simply trying to use what I have instead of buying a super high amp CC with three inputs.

    ???

    Thank you

  • #2
    Each "source" needs it's own controller.
    several controllers or chargers can feed a single battery bank, providing the batteries can take the combined power of all the sources (my 2 solar arrays and generator can feed 80amps into low batteries)

    Use the best controller for the Wind Turbine, it will see a lot of dynamic stress, heating and cooling with every gust of wind. The hydro should be pretty stable. You could cheap out and use PWM controller for solar.

    And the Hydro and Wind each need their own dump loads, if the sun is shining and the batteries are full, you don't want the 2 turbines to become unloaded and overspeed.
    Powerfab top of pole PV mount (2) | 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

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister

    Comment


    • #3
      Originally posted by SunGrace View Post
      My woodworking shop is equipped with 12 12v DC Batteries & catches the overrun from the house which runs off hydro and wind.
      OMG another person stuck inside a 12 volt box. 12-12 volt batteries is insane. Have you ever heard of 24 and 48 volt systems made with 2, 4, or 6 volt batteries. 12 volt systems are for Science Fair projects for the kids (toys) and RV's.
      MSEE, PE

      Comment


      • #4
        Originally posted by Sunking View Post
        OMG another person stuck inside a 12 volt box. 12-12 volt batteries is insane. Have you ever heard of 24 and 48 volt systems made with 2, 4, or 6 volt batteries. 12 volt systems are for Science Fair projects for the kids (toys) and RV's.

        Yes I've heard of and worked with 24, 48 and even one peculiar 168v dc system. My preference is 48v.

        All 3 12v 2500 watt continuous use inverters were free, 48 125ah 12v batteries free, water wheel and PM Alternator free, Helical wind turbine with PM Alternator free.

        My upcoming Solar Panels are free.

        Only purchases are cabling and MPPT CC's.

        I get this equipment legit through a client doing contract work for various power incentive group show projects.

        If you think this belongs in the landfill then you are entitled to your opinion.

        If you want to purchase what you believe to be a better system and ship it to me free, then please do so.

        Kindly take a moment to understand what is behind a post before you issue a knee jerk reaction sir.

        Good Day

        Comment


        • #5
          Originally posted by Mike90250 View Post
          Each "source" needs it's own controller.
          several controllers or chargers can feed a single battery bank, providing the batteries can take the combined power of all the sources (my 2 solar arrays and generator can feed 80amps into low batteries)

          Use the best controller for the Wind Turbine, it will see a lot of dynamic stress, heating and cooling with every gust of wind. The hydro should be pretty stable. You could cheap out and use PWM controller for solar.

          And the Hydro and Wind each need their own dump loads, if the sun is shining and the batteries are full, you don't want the 2 turbines to become unloaded and overspeed.


          Thank you so much Mike,

          The shop batteries are my primary "dump" source as the bulk of generation goes to the house batteries and they are serviced by a Morningstar Tristar TS-60 that is fed by a bridge rectifier to accommodate the two sources. No problems thus far.

          Adding the Solar Panels to the dump batteries is the new addition. Dumping beyond that will be to a water "Pre" heater.

          Comment

          Working...
          X