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RLS7201's avatar
RLS7201
Explorer II
Feb 03, 2015

Looking for a 40 amp MPPT solar charge controller

Looking for a 40 amp MPPT solar charge controller with fully adjustable charge voltages and an input voltage of 80 or more. Something like the unit in the link would work. Use pull down menu for 40 amp controller. Is it of known quality?

New-Tracer charge controller.

I'm open to suggestions of cost ver. quality on other 40 amp charge controllers.

Thanks
Richrd

68 Replies

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  • Salvo's avatar
    Salvo
    Explorer
    Feb 03, 2015
    I'm seeing a range of 13% to 1% difference. It depends on how much wattage the panel outputs. Why do that?

    jrnymn7 wrote:
    It appears there's only about a 1% difference in efficiency, though? (3215bn graph)

  • jrnymn7's avatar
    jrnymn7
    Explorer
    Feb 03, 2015
    Salvo wrote:
    That doesn't look too bad. Why are you going with such high voltage? Look at the efficiency plots. Better to do some parallel to reduce string voltage and increase efficiency.


    Salvo, I was wondering about that, myself. It appears there's only about a 1% difference in efficiency, though? (3215bn graph)

    I'm looking to go mppt next fall, for fall thru spring solar charging, with my two 12v/140w panels, and am wondering if I should go series or parallel?

    Thanks!
  • jrnymn7's avatar
    jrnymn7
    Explorer
    Feb 03, 2015
    RLS7201 wrote:
    2oldman wrote:
    By comparison, my 60a Outback was $500+.

    No, that $30 ebay product is 99.99% likely to be of poor quality.


    Thanks for your reply.

    The actual item is not the $30 10 amp charge controller that you reference but the optional $184 40 amp charge controller in the pull down menu.

    Richard


    $30 is for the remote. The link is to 4 sizes of controller, 10a - 40a, 150v input, 9-17v adjustable.
  • Salvo's avatar
    Salvo
    Explorer
    Feb 03, 2015
    That doesn't look too bad. Why are you going with such high voltage? Look at the efficiency plots. Better to do some parallel to reduce string voltage and increase efficiency.
  • RLS7201's avatar
    RLS7201
    Explorer II
    Feb 03, 2015
    2oldman wrote:
    By comparison, my 60a Outback was $500+.

    No, that $30 ebay product is 99.99% likely to be of poor quality.


    Thanks for your reply.

    The actual item is not the $30 10 amp charge controller that you reference but the optional $184 40 amp charge controller in the pull down menu.

    Richard
  • 2oldman's avatar
    2oldman
    Explorer II
    Feb 03, 2015
    By comparison, my 60a Outback was $500+.

    No, that $30 ebay product is 99.99% likely to be of poor quality.

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