What to do ?

dragntoysdragntoys Posts: 6Registered Users ✭✭
I have a system I bought in a storage locker and would like to set it up on a 14x60 mobile home .my question is how should i wire my panels .system consist of
2 flexmax 60 mppt charge controllers
2 samlex 600 watt pure sine inverters
24 rolls s6-460agm batteries
2 trimetric tm-2030 system monitors
10 mission solar 325 watt panels
10 mission solar 360 watt panels

And what power am i looking at getting out of this setup?
I was thinking running panels in series 5 panels at a time going into a combiner box then into a flexmax 60 charge controller then upgrading the inverter .my average daily kwh is 95 to 110 I live in charleston sc

Comments

  • PhotowhitPhotowhit Posts: 4,662Solar Expert ✭✭✭✭
    It may have some value as a backup for power outages, but it's really not well designed for home use. It will be important to know what condition the batteries are in,  24 Rolls 460 AGM batteries have some value even if they are dead. They need to be charged and then load tested. They can withstand a long periods without charging, but are best checked and charged every 2-3 months. They may Well be good. @Marc Kurth (I think that's the correct person) Sells AGM batteries and perhaps he can give yo some guidance on how to properly load test these.

    If they are bad they are 123 lbs of recycle and Johnson Control, just built a plant in Florence, S.C. so you may get north of 40 cents a pound to the right recycler or drop them there...lol.

    95-110 KWhs would take roughly (back of envelope) 24 KWh array to offset in a grid tied system. If you wanted to do a off grid system with no changes, You would likely want more than double that. So likely that isn't going to happen. Since you already have the batteries and they turn out to be good, you might be able to do a hybrid system with the batteries. With a Hybride system you sell energy back to the gride, but have the battery bank for outages.

    3 strings of 8 batteries would give you 1200 amp hours at 48 volts, or 1200 x 48= 57,600 watt hour battery bank. You would normally want to keep the system in the top 50%, so roughly 30KWhs of storage, would keep the fridges and freezer going and some minimal cooling and heating. 

    Note the 6850 watts of solar panels, would have a hard time returning more than about 20Kwhs to the battery bank in 4-5 hours of direct sunlight. So it would depend on how and why on the outage as to how much you would want to let the batteries run down.

    I've just done most of this in my head,so rough estimates, but I thought I'd throw it out there. A large hybrid inverter will be pretty costly and should be based on the maximum you will need at any one point in time.
    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: 2,052Solar Expert ✭✭✭✭
    Would this be an offgrid application?  There is a lot of good equipment but mismatched in terms of controller, PV, inverter and battery capacity, with a daily usage of 95-110kwh the system would need to be rather large with some serious calculations to achieve ballance . Was this equipment bought by you then put in a storage locker, or was it a  locker purchased on auction, if the latter the batteries may have been sitting for some time without charge, not a good thing.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • dragntoysdragntoys Posts: 6Registered Users ✭✭
    I bought in a storage locker .i paid 800.00 for all .and was just thinking of maybe running small stuff in trailer to knock the light bill down .lights and what i can .i actually thought about putting a breaker box next to my existing box and taking circuits out of one to put in other to run
  • dragntoysdragntoys Posts: 6Registered Users ✭✭
    I hooked batteries up to trimetric and they are reading 50.7 volts
  • mcgivormcgivor Posts: 2,052Solar Expert ✭✭✭✭
    Nice score, worth way more than $800, perhaps  $8000 +, a hybrid system with AC coupling  comes to mind,  just  typing while  thinking.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • dragntoysdragntoys Posts: 6Registered Users ✭✭
    I'm stuck on how to wire the pv panels i did 5 panels in parrallel but it was bringing in 209.86 volts so it said high voc on charge controller
  • BB.BB. Posts: 27,684Super Moderators admin
    5x panels in series?
    Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • PhotowhitPhotowhit Posts: 4,662Solar Expert ✭✭✭✭
    dragntoys said:
    I'm stuck on how to wire the pv panels i did 5 panels in parrallel but it was bringing in 209.86 volts so it said high voc on charge controller
    Yeah, there isn't a good way to use all the panels. The FM60(&80) have too high a VOC to use in series of 4 or 5, even 3 is too many in many climates, The VOC on the 335s is around 46.1 and the 360 is around 48.1. The VOC is rated at SOC which is 25c or about 77 Fahrenheit. The VOC will rise when cold and even in SC I suspect will be too high in strings of 3.

    Problem is the VMP is really too low to use in strings of 2. Perhaps the reason he set the system aside. It's a known problem with 72 cell panels and many MPPT type charge controllers.
    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.
  • dragntoysdragntoys Posts: 6Registered Users ✭✭
    So would it benefit me to look for another charge controller .looking for a way to use the panels to cut some off of the electric bill .will not be grid tie.
  • MrM1MrM1 Posts: 218Registered Users ✭✭
    edited August 9 #11
    IMHO u could use the midnite solar sizing tool to get an idea of what could work and if a MN classic would be of any benefit.

    http://www.midnitesolar.com/sizingTool/
    REC TwinPeak 2 285W 3S/3P 2.6kW-STC / 1.9kW-NMOT Array
    MN Solar Classic 150 / 2017 Conext SW 4024 Inverter latest firmware
    Trojan L16H-AC 435Ah bank 4S connected to Inverter with 7' of 4/0 cable / 24 volt system
    Grid-Assist Off-Grid / Need 3200Whs Daily Off-Grid
    System went Online Oct 2017
  • PhotowhitPhotowhit Posts: 4,662Solar Expert ✭✭✭✭
    There are some higher voltage charge controller by schnieder, and I think Morningstar, but they aren't cheap (Nor is the FM60)

    https://www.solar-electric.com/xaxwmp80amp6.html

    Morningstar;

    https://www.solar-electric.com/morningstar-ts-mppt-600v-48-db-tr-solar-charge-controller.html

    Midnite makes one for $550 That would allow you to do strings of 3 panels;

    https://www.solar-electric.com/midnite-solar-classic-200-sl-charge-controller.html


    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.
  • dragntoysdragntoys Posts: 6Registered Users ✭✭
    Considering i only have 800.00 in all i have it would be worth spending a little so i could use what i have
  • EstragonEstragon Posts: 2,607Registered Users ✭✭✭✭
    How cold does it get (ever - record low) where you'll be using them?

    What is the DC input voltage of the inverters?
    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
Sign In or Register to comment.