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Awesome new MPPT controller with bluetooth control for $99

Discussion in 'Power Systems' started by JCruse, Feb 19, 2017.

  1. Boltripper

    Boltripper Fixing things that are not broken... SILVER Star

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    I'm not sure yet..... I used a piece of aluminum as sort of a poor man's heat sink, but some people mount these in the engine bay.. I am concerned about that and will watch it.. As you stated though, I can just open the case if required.

    Cheers -

    john
     
  2. george_tlc

    george_tlc SILVER Star

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    Should be fine in the box. The charge controller is likely around 95% efficient (or better) at energy conversion, so even at full tilt of 15A output (say 14V output) you have 210W running through it. With 5% loss that's 210W x 5% = 10.5W thermal losses. No issues for the size of the unit and the thermal capacity of the box etc.

    Most of us are likely to have no more than 140W of solar, so then 140W x 5% = 7W thermal losses.

    cheers,
    george.
     
    Last edited: Sep 18, 2017
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  3. terrx

    terrx

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    I like the idea for portability. It's easy to move folding panels and the charge controller between different vehicles. I saw a small plastic "ammo box" at HF tools yesterday - looks like it would have enough room for both the Victron and leads to panel and battery. I may give it a whirl. Thanks.
     
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  4. Boltripper

    Boltripper Fixing things that are not broken... SILVER Star

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    Just wanted to pass along a note I received from Bioenno Power on their recommendations for Solar Charging their Lithium Iron Phosphate batteries.


    Below is my response to the question of a charging profile:

    Hi John,

    Charge at 14.6VDC, and float at 13.8VDC. The max charge current depends on the model of battery. The charge current is usually max about 0.3C (or 0.3 x capacity of the battery). For example, the 12V, 20Ah, the max charge current is 6 Amps

    -Kevin



    Hope this helps -

    John~
     
  5. JCruse

    JCruse

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    Whatdaya want, a book for a title..?
    Sheesh.

    As far as Im concerned you kinda have a point... without the ability to modify settings I may have passed on this one. But overall I like it very much.
     
  6. JCruse

    JCruse

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    I have a new question...

    On bluetooth it says it was giving the battery12.87v, but the voltage reading for the battery was 12.64. Does that mean that this thing can diferentiate between the two simultaniously?

    Because I"ve never seen that before in a CC.
     
  7. george_tlc

    george_tlc SILVER Star

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    The unit can display input voltage (from panel) and output (to battery). Do note that:

    a) the output voltage will be at the terminals of the unit - you will have voltage drop in the wiring (assuming charge current is present) and the voltage at the battery will be lower. Ditto that displayed input voltage will be right at the terminals of the unit (versus right at the solar panel).

    b) 12.64V versus 12.87 is (12.87-12.64)/12.64 = 1.8% difference. Don't assume the unit has 4 digit precision (it isn't a precision multimeter)....

    cheers,
    george.
     
  8. Hiace4wd

    Hiace4wd

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    What do you mean the "voltage reading for the battery"? Is there a seperate meter? Or you used a multimeter?
    Could be that there is some resistance in one of the connection (like the batteryplugs or so) or just long wiring.
     
  9. e9999

    e9999 You want to do what...? Moderator

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    So are you guys still happy with the gizmo? Still think it's worth buying or is there much better now for the price?
     
  10. Boltripper

    Boltripper Fixing things that are not broken... SILVER Star

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    I've only used mine a few times, but its been flawless. I'm not sure about any others that have the BT capability, but for that feature I would buy again.

    Cheers,

    John
     
  11. Hiace4wd

    Hiace4wd

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    I still like it a lot. The bluetooth makes it easy to change some settings while on the trip, and to check operation.
    And there aren't many competitors that can work with the high voltages ( I use a 40 Volt panel )

    What I think is a shame that other controllers have an extra relay connection that indicates if the battery is full. This one has the Float mode, basically saying the same thing. But not as an external connection. If it had, it would've been perfect.
     
  12. cme4lyt

    cme4lyt SILVER Star

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    Love mine ! Accurate and great peace of mind. Love being able to check everything from an iPad/iPhone.
     
  13. LandForce1

    LandForce1

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    Hi gang,

    I am building a solar power supply box and have hit a road block on how to wire this portion of the project. As pictured I am wanting to wire the 3 piece accessory outlet upto the blue solar charge controller unit, I have a couple leftover distribution blocks that I thought I might use. The inverter will not be connected to the load output of the charge controller, only the 12 volt accessories will be ran through the load output of the charge controller. My questions are....

    - Do I wire the three accessory outlets in parallel in order to achieve a constant 12v output regardless of how many outlets are in use?
    -Will the short runs of 10 gauge wire be enough to handle the potential max 20 amp capacity of the mppt unit?

    *** any other feedback is welcome as well.

    20171014_234015.jpg

    20171014_234027.jpg
     
  14. george_tlc

    george_tlc SILVER Star

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    ^ yes, of course you wire all 3 outlets in parallel to get 12V to each one independent of what the other is doing.

    10g for 20A is plenty good - especially with only a couple of inches between each outlet and the mppt controller.

    American Wire Gauge Chart and AWG Electrical Current Load Limits table with skin depth frequencies and wire breaking strength is a quick reference. You are doing 'chassis' wiring.

    I would not have that lid of the box closed when you are running the inverter at high power levels - it'll have no convection cooling.

    I assume the idea of this 'unit' is to have a portable setup between vehicles?

    cheers,
    george.
     
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  15. BulletHead

    BulletHead Village Idiot SILVER Star

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    Parallel = voltage constant, current adds up.
    Series = current constant, voltage adds up.
     
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  16. LandForce1

    LandForce1

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    Yes, the box is to just carry everything around to each vehicle or area. The lid will definitely stay open during inverter operation. Thanks guys! I will post a pic when I'm finished with it.
     
  17. JCruse

    JCruse

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    Mine is under the hood of my 80 right behind the second battery box mounted on the fender. I put a piece of rigid plastic sheet above it to keep water from pouring through the hood/fender panel gap. Its been there since I started this thread and so far so good.
    I figured with no remote temp sensor it was best too keep it near the battery.
     
  18. JCruse

    JCruse

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    My Lifeline and Odyssey batteries both list bulk and float voltages on top.
     
  19. Wagonofdoom

    Wagonofdoom

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    I use the 100/30 on 3 100 watt panels and love it. Works amazingly.