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Thread: Which solar panel to buy

  1. #21
    Patrol God Bob's Avatar
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    This is my Setup

    dual_battery_srp_wiring.gif

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  3. #22
    Patrol God threedogs's Avatar
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    Not to scale but basically what I have done,,, short run from the mppt to the battery
    Only thing I'll change is the way I hook up the panel using those MC4 connectors
    instead of a 50 amp anderson plug, Bummer as I need to change all my panels
    80 watt, 20 watt and a 10 watt,plus my new one 120 watt

    @ Bob did you have yours screwed onto a board or something
    maybe screw it in a low tupper ware dish with some vent holes
    Last edited by threedogs; 22nd September 2015 at 03:47 PM.
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

  4. #23
    Patrol God Bob's Avatar
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    Quote Originally Posted by threedogs View Post
    Not to scale but basically what I have done,,, short run from the mppt to the battery
    Only thing I'll change is the way I hook up the panel using those MC4 connectors
    instead of a 50 amp anderson plug, Bummer as I need to change all my panels
    80 watt, 20 watt and a 10 watt,plus my new one 120 watt

    @ Bob did you have yours screwed onto a board or something
    maybe screw it in a low tupper ware dish with some vent holes
    Installed in a sealed Box which is opened when in use



    A bit junky at present but this is how close to the Battery

    Last edited by Bob; 22nd September 2015 at 04:16 PM.

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  6. #24
    I am he, fear me the evil twin's Avatar
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    I'm not 100% sure those Redarc's are a full MPPT controller, could well be but they are certainly a good quality unit.
    Last edited by the evil twin; 22nd September 2015 at 06:13 PM.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

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    Patrol God threedogs's Avatar
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    Quote Originally Posted by the evil twin View Post
    I'm not 100% sure those Redarc's are a full MPPT controller but they are certainly a good quality unit.
    Please explain what you mean
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

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    Quote Originally Posted by threedogs View Post
    Please explain what you mean
    Very, very rare to find a good MPPT below a couple of hunjy. Good name brand will be $300 and up

    As a point of interest the 25 and 40 Amp jobbies in the BCDC series are quoted as MPPT by Redarc but the SRP series wasn't AFAIK

    Depends on the guts but a big MPPT Controller will take 60 to 150 Volt panel input give or take.
    I 'think' they can get the costs down of the MPPT if they limit the Panel Voltage and it's interesting that Redarc quote a max panel input of 30 odd volts
    30 volts is the normal limit for a PV controller ergo those 10 and 20 amp redarc stand alone jobbies may be MPPT but personally I am not 100% sure.

    Best way would be to check with Redarc but either way you know you are getting a good controller
    Last edited by the evil twin; 22nd September 2015 at 06:33 PM.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

  9. #27
    Patrol God Bob's Avatar
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    Quote Originally Posted by the evil twin View Post
    Very, very rare to find a good MPPT below a couple of hunjy. Good name brand will be $300 and up

    As a point of interest the 25 and 40 Amp jobbies in the BCDC series are quoted as MPPT by Redarc but the SRP series wasn't AFAIK

    Depends on the guts but a big MPPT Controller will take 60 to 150 Volt panel input give or take.
    I 'think' they can get the costs down of the MPPT if they limit the Panel Voltage and it's interesting that Redarc quote a max panel input of 30 odd volts
    30 volts is the normal limit for a PV controller ergo those 10 and 20 amp redarc stand alone jobbies may be MPPT but personally I am not 100% sure.

    Best way would be to check with Redarc but either way you know you are getting a good controller
    I went with the Redarc as they can be set for Calcium Batteries (Which I have).

  10. #28
    I am he, fear me the evil twin's Avatar
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    Quote Originally Posted by Bob View Post
    I went with the Redarc as they can be set for Calcium Batteries (Which I have).
    Good choice.
    I really rate Redarc and Intervolt, both Aussie and both very high quality.

    If they don't have what I want I tend to use Ctek... or... Morningstar or Tracer for industrial applications
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

  11. #29
    Patrol God threedogs's Avatar
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    @ ET my MC4 connectors have arrived, do you them together or alternate them
    As in on the Panel do i use f and f or f and m, I dont see how it would make
    much difference.
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

  12. #30
    I am he, fear me the evil twin's Avatar
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    Quote Originally Posted by threedogs View Post
    @ ET my MC4 connectors have arrived, do you them together or alternate them
    As in on the Panel do i use f and f or f and m, I dont see how it would make
    much difference.
    It will make a difference if you cross connect 'em...

    The convention is...
    The MC4 should have a -ve if you look close goes to the -ve output lead from the panel
    Last edited by the evil twin; 24th September 2015 at 04:13 PM.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

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