5x400w panels 24v system

Miyaksue
Miyaksue Registered Users Posts: 1 ✭
in General Solar Power Topics #1


Howdy. I have 5 of those panels and such controller.  Hoping to achieve a reliable 24v setup.
Can I please get advice as to how to wire the panels together?
Much appreciated!

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  • Photowhit
    Photowhit Solar Expert Posts: 6,006 ✭✭✭✭✭
    #2
    Not a great combination, the charge controller may be damaged if you try to do a 2 in series in a string and 2 strings in parallel, You will want to see what you max low temperature is and likely 'cheat' and use Midnites string sizing tool to see if the voltage will run too high when you are near your max cold snap. When colt the panels VOC will rise at 47 volts per panel and a combined 94 volt VOLT in series, you won't be safe in very cold temps. Of course this only uses 4 of your panels,

    Your charge controller will want more voltage than a single panel can provide.

    Another option if you panels are near your battery bank, is to run all the panels in parallel and buy a 60 amp PWM (cheap) charge controller. You would typically want to use a combiner box and put each panel on a fuse or breaker.


    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Magnum MS4024, Prosine 1800(now backup) and Exeltech 1100(former backup...lol), 660 ah 24v Forklift battery(now 10 years old). Off grid for 20 years (if I include 8 months on a bicycle).
    - Assorted other systems, pieces and to many panels in the closet to not do more projects.
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