mixing panels

PluckaPlucka Posts: 36Registered Users ✭✭
I have 4 x 200 watt 12 volt panels.I run two panels in parallel per controller but I need another 200 watts .Can I run an another 100 watt panel to each controller.

Comments

  • PhotowhitPhotowhit Posts: 4,606Solar Expert ✭✭✭✭
    We'll need the vmp and isc of the panels and the type and model of the charge controller.
    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.
  • PluckaPlucka Posts: 36Registered Users ✭✭
    Thanks-200 watt panel VMP 18 volts---ISC 11.89                                                                                                                                                             100 watt panel VMP  18 volts---ISC 5.73                                                                                                                                                              Controllers LDSolar MPPT 30 amp TD2310
  • littleharbor2littleharbor2 Posts: 963Solar Expert ✭✭✭✭
    The controller you have is an MPPT controller with a max voc. of 100 volts. You need to get the voltage higher than the output voltage of your 12 volt panels. As it sits now you should have your panels wired in series. You can add another panel and you HAVE to wire all three panels in series.

    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.

  • mcgivormcgivor Posts: 1,899Solar Expert ✭✭✭✭
    edited June 14 #5
    +1 on 3 panels in series for each. Parallel wired the voltage could be too low when hot for the MPPT to work efficiently.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • littleharbor2littleharbor2 Posts: 963Solar Expert ✭✭✭✭
    edited June 14 #6
    Oh shoot! I just noticed you are asking about mixing different panels, duh, being the name of your post. Scratch my last answer. The coffee hasn't kicked in yet.

    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.

  • mcgivormcgivor Posts: 1,899Solar Expert ✭✭✭✭
    Missed that too, parallel would be the only practical way, given the addition of a 100W panel to the existing 200W currently in parrallel.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • littleharbor2littleharbor2 Posts: 963Solar Expert ✭✭✭✭
    About all you can do would be to put two of the 100 watt panels on parallel branch connectors to double the amperage, THEN series wire them with the 200 watt panels. All in series. You should still be fine with max Voc. but you will be somewhat  overpaneled for a 12 volt system. MPPT controllers can be over paneled so probably not an issue.

    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.

  • PluckaPlucka Posts: 36Registered Users ✭✭
    My problem is my van is all 240 volts and my panels are on a flat roof, in winter with clouds and rain I'm struggling to fully recharge my 360 amp/hr lithium battery so my thoughts were to put two [ to balance the controllers] 100 watt panels  on the side of the van on hinges so I could adjust the angle to the sun.As an after thought would it be better to use one 200 watt panel  going to one controller [giving one controller 600 watts and the other one 400 watts ] ? . Both controllers go to the one battery bank.
  • littleharbor2littleharbor2 Posts: 963Solar Expert ✭✭✭✭
    One 200 watt panel would be simpler and a perfect match (I assume) to the others. You need to series wire all of them any way you go. At this time with your panels wired in parallel you are not supplying proper voltage to your controller, Especially mounted on top of a hot van roof.

    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.

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