Help Midnite Solar Classic 150 Experts - Resting not float

tr0ytr0y Solar Expert Posts: 86 ✭✭✭
Hi All - 

I have a Midnite solar Classic 150 in my RV, I have approximately 1600 watts  6 275 watt panels,  of PV on the roof wired in Series / Parallel ( yes slightly over paneled but within the OK via Midnite Solars site, they are also flat mounted in a very hot climate. ) 

I am new to this controller, have had Outback controllers for the last 10 years and thought I would give one of these a try, so looking at it is is reading 60.x watts 0000 watts coming in  and resting. Batteries reading 13.2v Should I now not be in float rather than resting ?  Panels were working fine last night and early this AM ? The Midnite solar manual is not the greatest. Is this normal or should I start looking for issues ? 

Thanks 

Comments

  • mike95490mike95490 Solar Expert Posts: 8,030 ✭✭✭✭
    If the battery voltage is above the setpoint for the stage you are in, it goes to RESTING.  Do you have another charge source active now?
    Powerfab top of pole PV mount | 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 ,

  • tr0ytr0y Solar Expert Posts: 86 ✭✭✭
    No no other charge sources available. This now would make sense as Float is set @ 13.4v per battery manufacturer spec, and it is also 107F outside. It would be my guess that the temperature compensation is seeing that and backing the voltage down slightly. My bet is if I did the math I am right about where I should be. 

    Midnite Solar just is not real clear on what device status is/ means in their documentation.  
  • EstragonEstragon Registered Users Posts: 3,039 ✭✭✭✭✭
    I think the android app for classic shows reason for resting, as does the Midnite LocalApp. Listing of codes...
    http://midniteftp.com/forum/index.php?topic=2034.0
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • VicVic Solar Expert Posts: 2,934 ✭✭✭✭

    So,  tr0y,

    Am having a bit of a problem  understanding exactly what you are saying when you said,  "   ...   so looking at it is is reading 60.x watts 0000 watts coming in  and resting. Batteries reading 13.2v Should I now not be in float rather than resting ?   ..."

    One thought,   is,  when the Classic finishes Absorb,  it will enter the Float stage,   and that will be displayed for about 90 seconds,   but,   depending on the amount of load on the system,   the battery voltage will remain above the temperature-compensated  Float setpoint  (Vflt).  After those about 90 seconds,  if the battery voltage remains above the compensated Vflt,   the Classic will "Rest",  until the battery voltage descends to the comped Vflt,   and again show Float, but with some power being delivered to the batteries and loads.

    Do you believe that you might have been looking at the Classic  when it was in this stage? The time period for power being produced in Float  after exiting Absorb  is often minutes,   depending on the size of the battery bank,   the kind of batteries (Lithium batteries often require a long time to begin producing power,  after exiting Absorb),   and the loads on the system ...

    FWIW,   guessing,   Vic

    Off Grid - Two systems -- 4 SW+ 5548 Inverters, Surrette 4KS25 1280 AH [email protected], 11.1 KW STC PV, 4X MidNite Classic 150 w/ WBjrs, Beta KID on S-530s, MX-60s, MN Bkrs/Boxes.  25 KVA Polyphase Kubota diesel,  Honda Eu6500isa,  Eu3000is-es, Eu2000,  Eu1000 gensets.  Thanks Wind-Sun for this great Forum.
  • EstragonEstragon Registered Users Posts: 3,039 ✭✭✭✭✭
    My 12v system today was resting with reason for resting 38. LocalApp reports this as "unknown". According to the linked post, RFR38 is "the new sleep, because other sources appear to be charging". I do have another source (panels for winter float charging on pwm controllers) on both 12v and 48v banks. The float panels are a bit more west oriented in their temporary home, so start seeing sun and end later than the main array

    The 48v bank has larger daytime loads though, and is less likely to go into a resting state. In other words, I think @Vic is correct if the RFR is the same, basically the classic doesn't need to provide current to maintain float when it thinks it should, so it rests.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • boBboB Solar Expert Posts: 953 ✭✭✭✭
    What is the PV INPUT voltage ?  Have you tried going to the TWEAKS menu and forcing a BULK just to see if it comes out of resting ?
    When the battery gets hot, the set-point voltage goes down even further which might be a part of this.

    If you go into the CHARGE menu, them Temp-Comp sub-menu and hit the VIEW key (upper-right or soft-right key), it will show what the present target voltage is...  If it is lower than the actual battery voltage then that is all it is.

    The INPUT voltage must also be higher than the battery voltage by a certain amount too to start up from resting.

    boB
  • tr0ytr0y Solar Expert Posts: 86 ✭✭✭
    @Vic
    It sound as if I may have seen it at the point that you indicated. There is little to no load on the system at the moment as it is in an RV and today the RV is just sitting in its spot, hanging out. Also again the ambient temp outside is was about 107 when I took this picture. 



    This could be totally normal, but I am new to the Midnite Solar controllers and have just never seen this is all.  There was and is plenty of sun and a clear shot to the PV panels so if it needed that to make power there was more than enough. 

    Thanks 
  • VicVic Solar Expert Posts: 2,934 ✭✭✭✭

    OK tr0y,

    Thanks for the update.   Please let us know how the system is doing during the next few days.

    Vic

    Off Grid - Two systems -- 4 SW+ 5548 Inverters, Surrette 4KS25 1280 AH [email protected], 11.1 KW STC PV, 4X MidNite Classic 150 w/ WBjrs, Beta KID on S-530s, MX-60s, MN Bkrs/Boxes.  25 KVA Polyphase Kubota diesel,  Honda Eu6500isa,  Eu3000is-es, Eu2000,  Eu1000 gensets.  Thanks Wind-Sun for this great Forum.
  • boBboB Solar Expert Posts: 953 ✭✭✭✭
    Take a look at the Reason for Resting number.  From the main status screen, HOLD down the LEFT-ARROW key and tap the ENTER key...   A new menu comes up and there should be a number at the top middle of the screen (and some other numbers).  OR, take a picture of it. 

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