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  • Conext XW6848 - 2nd generator

    Hello!

    I own a Conext XW6848 with a Kohler RESA 14 connected in AC2. I am completely off grid.

    Does anyone know if it's possible to run a 2nd (backup) generator connected in AC1 in case the Kohler goes kaput and I really need one to charge the batteries?

    Note that I would keep the AGS for the Kohler - and manually start the 2nd generator connected in AC1 in case it is really needed. No automatic stuff is required here but I need the inverter so I can charge the batteries.

    Thanks,

  • #2
    I found that after posting: https://www.se.com/us/en/faqs/FA312511/

    Looks like it is possible.

    Comment


    • #3
      Yes, it's possible. Use the SCP or the COMBOX to copy your AC2 (Gen) settings to AC1 (freq, voltage, breaker sizes)

      I use a couple RV outlets on each of my generators, and my AC2 has a plug on it, to plug into any of my 3 sources for charging.
      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

      Comment


      • #4
        Hi Mike,

        Thanks for your response! Out of curiosity, is your Lister generator connected in AC1?

        I was thinking about adding a 250V/50A receptacle to the AC1 line near the inverter and using a 25ft long 250V/50A extension cord to run the portable (backup) generator outside.

        Thanks!

        Comment


        • #5
          no, my generator is connected to AC2, which is standard. AC1 is empty, awaiting a day when grid may arrive. AC1 would work as well, as long as you have inhibited the ability to sell back to the grid. Generators don't like that !
          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

          Comment


          • #6
            Hi @Mike90250! Since I also have a PDP, I guess the electrician (that will do the work) should wire AC1 to an AC breaker in the PDP and then from the PDP wire a NEMA 14-50R male receptacle?

            Comment


            • #7
              Originally posted by extrafu View Post
              Hi @Mike90250! Since I also have a PDP, I guess the electrician (that will do the work) should wire AC1 to an AC breaker in the PDP and then from the PDP wire a NEMA 14-50R male receptacle?
              I'm not clear what you are asking. You are going to have to work it out with the electrician, and hopefully he understands what he is doing and can explain to you, all the breaker configurations to select what you want.
              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

              Comment


              • #8
                Sorry if I wasn't clear. What I meant is that from Schneider's documentation, it is possible to connect the generator into AC2 without going through the PDP when not available. I guess I could do the same with AC1 but since I own a PDP, it is likely better to go through the PDP like it's the case right now with my AC2 going to my Kohler generator and do the same thing with AC1 with the backup generator.

                Thus, install a new 60A breaker in the PDP (like for the Kohler in AC2 right now), wire the AC1 to that breaker, wire the NEMA 14-50R male receptacle to that breaker and then changes the AC1 settings in the XW6848 .
                Last edited by extrafu; 12-31-2019, 12:28 PM.

                Comment


                • #9
                  I'd be very cautious about using simple breakers to select gen1 or gen2. I'd feel better if you used an interlock for breakers like are used for transfer switches. If you ever had both breakers on you would supply voltage into the other generator, which usually has bad results.

                  20190805_175301.png
                  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

                  Comment


                  • #10
                    Hi Mike, thanks for your response. While I think what you suggest is very wise, maybe the XW6848 is smart enough to not do this actually? Ie., not passing voltage between AC1/AC2?

                    It looks like this post from Schneider confirms this: https://www.se.com/us/en/faqs/FA312511/

                    I could ask Schneider to confirm this too.

                    Comment


                    • #11
                      The XW is smart enough. Just make sure your electrical panel connections are not going to have an unintended effect.
                      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

                      Comment


                      • #12
                        Sure thing! The connection will go to AC1 and only to AC1.

                        Comment


                        • #13
                          Hi Mike! When I try to set the "AC1 Association (Grid)" from the Combox to "Generator 2" in the XW+6848 I get: "The value could not be changed"

                          So I can't do it. Have you ever seen that? Even the Schneider folks told me it would have to be done.

                          Right now my primary generator is connected in AC2 and "AC2 Association (Generator)" is set to "Generator 1". I want to add a 2nd generator to AC1.

                          Thanks,

                          Comment


                          • #14
                            Maybe AC1 can only be Generator 1, and AC2 Gen2 ??

                            As long as your SELL to AC1 is disabled, you should be 'pretty' safe.
                            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

                            Comment


                            • #15
                              Tried changing AC2 to Gen 2 and I have the same error message ("The value could not be changed"). Tried to first change the association in the AGS from Gen 1 to Gen 2, same error message. Pretty weird...

                              Comment

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