Morningstar Mppt

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Will2020
Will2020 Solar Expert Posts: 62 ✭✭✭✭
in General Solar Power Topics #1
Right now I have a 135 watt panel and 315 ah worth of agms, and I'm about to add another 135 panel and a 105 ah agm. This is a 12 volt system.

So I'll have 270watts of panel and 420 ah battery. Would there be any benefit in adding a morningstar 15 amp mppt charge controller? It says it is good for 200 watts, so is 270 too much?

Will it help charge better in winter/ and or on cloudy days? O should I just stick with the 25 amp moringstar which I currently have?
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
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    Re: Morningstar Mppt

    Stick with the controller you have.

    But be sure the Vmax power of the new panel is close to the existing panel, which for a 12V PWM controller, should be about 18-19V.

    But I suggest caution about adding another battery, to existing batteries, unless they are only a few months old. You currently are under size for the amount of battery you have, adding yet more battery will not help. Adding more solar is the right thing.
    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 ,

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