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Has Anyone Encountered This Issue With Solaredge Inverter?

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  • Has Anyone Encountered This Issue With Solaredge Inverter?

    So I just got a brand new 11.725 kW system.

    LG 335's Neon 2.
    Solaredge P370 Power optimizers
    Solaredge SE10000A-US inverter.

    The system is working beautifully but unfortunately the inverter reboots every time somebody showers. We have a tankless water heater (Ecosmart Eco 11) to be exact. I called Solaredge and we ran a few diagnostics and the rep was able to clearly see what he calls "Total harmonic distortion".

    Now, I paid good money for this system and it is very disappointing the inverter shuts off every time the shower is on due to this abnormality.

    Solaredge Rep suggested two solutions to the problem:

    1. Move apart the breakers for the water heater on the inside of the house. (Hope that the issue gets resolved but if not option 2)

    2. AC line filtering

    Attached image below is Solaredge reps live diagnostic while shower was on. Clearly causing the inverter to reboot.

    My solar installer is saying their license is for PV only and he doesn't wanna risk his license. So there's that.

    So my question is the following: Has anyone encountered this error and resolved it? Any suggestions?

    Screen Shot 2018-01-29 at 6.45.02 PM.png
    Last edited by Techm7; 01-29-2018, 07:48 PM.

  • #2
    I've seen a lot worse. Apparently the solid state heater control is not filtered. I would try a
    low frequency line filter of some sort, some simple magnetic reg units have been around a
    long time, rugged but heavy. I have a SOLA here, but at 180VA not big enough for the
    tankless heater. I'd probably dump the tankless heater.

    I once had a tank heater that had to be run manually, and I found once hot it maintained
    temp for half a week. The"advantages" of tankless appear grossly exaggerated to me.
    Bruce Roe
    Last edited by bcroe; 01-29-2018, 08:17 PM.

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    • #3
      is the water heater Gas or Electric ??
      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
        Originally posted by Mike90250 View Post
        is the water heater Gas or Electric ??
        it's electric

        Comment


        • #5
          Originally posted by bcroe View Post
          I've seen a lot worse. Apparently the solid state heater control is not filtered. I would try a
          low frequency line filter of some sort, some simple magnetic reg units have been around a
          long time, rugged but heavy. I have a SOLA here, but at 180VA not big enough for the
          tankless heater. I'd probably dump the tankless heater.

          I once had a tank heater that had to be run manually, and I found once hot it maintained
          temp for half a week. The"advantages" of tankless appear grossly exaggerated to me.
          Bruce Roe
          I see. Wish I didn't make that decision. I have a Tesla battery being installed soon, do you think it will solve the problem or still exist?

          Comment


          • #6
            Really, a tankless electric hot water heater? I'm not sure I see the energy savings in that. I assume you don't have natural gas or propane available? Given how inexpensive the Ecosmarts are, I agree with Bruce, dump it, and replace it with a large, well insulated, high efficiency unit -- natural gas if possible.

            For your EcoSmart -- that's 13kW with a 60amp two pole breaker (according to the specs on Amazon). Given the size of your PV array, I assume you have a line side tap? And the breaker for your hot water heater is in your electrical panel? If so, no amount of moving the breaker around will likely help. While it's possible you are getting a harmonic, I'm more inclined to expect its a voltage sag. What's the voltage drop to when it kicks on? How does this compare to when you AC kicks on? What happens if both are running together?!?! Do you have a 200 amp service?

            Filtering, Starting Capacitor, and/or isolation transformer come to mind for the hot water heater. Eaton makes a 60amp Split phase line filter AEGIS series. But it probably costs more than your hot water heater. Not sure if a few cheap chokes would be sufficient. I would call Ecosmart and see what they suggest.

            Comment


            • #7
              I had a problem with mine doing this when the LED can lights were on. When it was having the harmonic problem, the inverter would rattle like a Gieger Counter. Once I was finally able to figure out what was causing it, it was easily fixed. With help from TJ at SolarEdge support, I found that all I had to do was connect a small motor run capacitor($8) between L1 & L2. Haven't had a problem since.

              Good luck,
              Greg

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