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Question, what device do i need to connect two solar panels

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  • Question, what device do i need to connect two solar panels

    i have a power station and only have peak sunlight for about 5 hours. I wanted to know what do i need to buy to connect the two panels together to deliver more power

  • #2
    Welcome to the forum. More details would really help, such as the make/model of the equipment and panels.

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    • #3
      Your 2 panels need to be pretty much the same, and your charge controller / regulator needs to be rated to handle the extra power

      Generally, you could use a simple pair of MC4 Y connectors to parallel them, or a MC4 M-F jumper if your controller is MPPT and can convert the extra volts to amps
      Powerfab top of pole PV mount (2) | 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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      • #4
        PAXCESS Rockman 500W Portable Power Station, I thought i could daisy chain my two panels lg 305w lg305nicb3 panels

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        • #5
          thanks, im getting my panels today, ill let yall know

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          • #6
            If we're looking at the same model, the solar input specs are "11-24V 120W Max", I think you'll exceed the input voltage and power with even one of those panels, and possibly do some damage.

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            • #7
              Originally posted by sdold View Post
              If we're looking at the same model, the solar input specs are "11-24V 120W Max", I think you'll exceed the input voltage and power with even one of those panels, and possibly do some damage.
              I will agree with sdold. That Rockman is not designed for high wattage input.

              Your original question about what equipment you need to use 2 solar panels. IMO you need to rethink using that 500w portable power station unless you are getting those low wattage Rockman panels.
              Last edited by SunEagle; 02-01-2021, 05:12 PM.

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              • #8
                sorry that 300w panel was bought used, it barely outputtting 5w, i bought 2 100 watt panels from HD, im using them now

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                • #9
                  Originally posted by placez View Post
                  sorry that 300w panel was bought used, it barely outputtting 5w, i bought 2 100 watt panels from HD, im using them now
                  If that 300w panel is only producing 5w then it is a door stop and should be disposed of.

                  As for 2 x 100 watt panels being used to charge that Rockman. Well maybe if you point each in a different direction so you never exceed the 120w max input that their specs mention.

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                  • #10
                    thank yall for all the help

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                    • #11
                      Originally posted by SunEagle View Post

                      If that 300w panel is only producing 5w then it is a door stop and should be disposed of.
                      I always thought bad panels would be handy if kept and mounted at the bottom of an array in an easy-to-access position, to act as a sort of sacrificial anode or "low hanging fruit" for thieves. heh heh

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