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69_Avion's avatar
69_Avion
Explorer
Sep 28, 2013

Question for all you solar experts

I have ordered a 250 watt Sharp 24 volt Solar panel. Now for my question. I would like to use a Morningstar Sun Saver 15 MPPT controller. The problem is that the sales person said that the 15 amp MPPT Sun Saver controller isn't large enough for my panel. Does anyone have experience with this? I don't want to have to go to a 45 amp controller unless I absolutely have to.

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  • harold1946's avatar
    harold1946
    Explorer
    Sep 28, 2013
    69 Avion wrote:
    I have ordered a 250 watt Sharp 24 volt Solar panel. Now for my question. I would like to use a Morningstar Sun Saver 15 MPPT controller. The problem is that the sales person said that the 15 amp MPPT Sun Saver controller isn't large enough for my panel. Does anyone have experience with this? I don't want to have to go to a 45 amp controller unless I absolutely have to.


    The reason is that you will be operating at the maximum rated amps for that controller, with no safety margin. I have seen 15 amp panels produce as much as 22 amps under the right conditions, which could possibly destroy the controller.
  • djorgensen3's avatar
    djorgensen3
    Explorer
    Sep 28, 2013
    Try reading some of the stuff on the following site.

    http://handybobsolar.wordpress.com/
  • donn0128's avatar
    donn0128
    Explorer II
    Sep 28, 2013
    You are ordering a 24V panel? OK just exactly how are you going to connect that to your 12volt battery?

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