Tag: solar inverter

  • Deye Addresses Bricked Inverter Controversy

    Deye Addresses Bricked Inverter Controversy

    On Friday, Nov 15th, we started getting reports of bricked Deye inverters in the US, Canada, and elsewhere. I asked Deye for comment before I published my original article, and only now, two weeks after the incident, did Deye get back to me with a comment.

    It’s a fairly long statement, so I’m going to interject along the way to add context and harrumphs.

    Recently, some users have reported instances of pop-up alerts on their devices.
    To avoid any misunderstanding, Deye hereby issues the following statement:

    1.Region Where Pop-Up Alerts Occurred

    Based on the current investigation results, very few inverters have displayed pop-up notifications, all of which are located in the United States. Devices in other regions are not affected by this pop-up.

    According to reports, this doesn’t seem to be true. While it’s true that most reports I’ve seen are from Puerto Rico (I assume the gray market is strong there for these inverters), there have also been reports from Canada, and one I’ve seen from Panama. Perhaps there were casualties along the way, but it doesn’t seem like it was isolated to the United States.

    2.Reason for the Pop-Up Alerts

    Deye has not remotely controlled or interfered with your devices in any form. Currently, there is no evidence to suggest that these inverters have been maliciously remotely controlled via Deye’s cloud services.

    Harrumph.

    The contracts we sign with all dealers clearly stipulate that products that are not UL certified and listed by local power grid companies may not be sold or used in the United States, because the products do not meet US UL standards. If used in violation of this policy, the devices may pose significant-safety risks. To address this, Deye has built a verification mechanism into the devices. The pop-up alert is automatically triggered by the device’s authorization verification mechanism, rather than by any human intervention.

    The inverters produced by Deye routinely perform automatic checks of their authorization status.. If the device fails the authorization verification, a pop-up alert will notify the user. The purpose of this is to ensure the device is used in compliance with regulations.

    Now, this could be true, but I have a hard time with the idea that Deye inverters have performed this automatic check for longer than, say, two weeks. While Deye may not have maliciously (a word I haven’t used, nor do I think is accurate) remotely controlled the inverters, that doesn’t really eliminate the possibility of them remotely updating firmware to a version that starts performing these automatic checks.

    If they were able to provide a timeline of when this firmware began making these checks and how long that firmware has been available for the inverters, I’d be more willing to believe the statement as given. However, the fact that there is no timeline given at all is, as the most professional journalists say, sus.

    3.Statement on Sales and Technical Support in the U.S.

    According to Deye’s current business policy, Deye does not directly export or sell Deye brand inverters to the United States, and it requires distributors not to resell Deye brand inverters to the U.S. Therefore, Deye is currently unable to provide technical support for inverters in the U.S. market.

    4.Recommendations and Support

    To ensure the normal use and service experience of the device, Deye recommends that users who see pop-up prompts contact your seller or contact Deye directly as soon as possible to obtain legal authorization.

    The circulation of unauthorized devices disrupts the normal market order, potentially causing losses and risks for users who purchase unauthorized equipment, while also damaging Deye’s legitimate rights and interests.

    Deye urges users to purchase legitimate devices through authorized channels to protect their legal rights.

    While it’s still terrible that all of this happened in this way and that it wasn’t happening immediately upon installation of these inverters, this is probably the best response I could expect. It is objectively good to hold up their end of the exclusivity agreement they’ve signed with Sol-Ark and other brands. The sting of this statement is that the folks experiencing the pain of this alert probably bought the inverter from a dealer or installer who won’t answer their phone calls. Hopefully, there’s a resolution to be had for those people, who are caught in the gray-market crossfire.

    5.Deye’s Commitment

    Deye remains committed to maintaining market order and protecting the user experience and rights of all legitimate customers.

    Deye places great importance on cybersecurity and privacy protection, having established a multi-layered, comprehensive information security defense system.
    As always, Deye will continue to prioritize users and provide safe, reliable, and stable services and support.

    I mean yeah, this is what a company SHOULD say, and all of them do. The fact remains, most internet-connected inverters can theoretically be subjected to something like this, and there’s shockingly little work being done in the field to create options where the owner of the inverter is the ultimate holder of the keys.

    If you’re dealing with this issue in the United States or Puerto Rico, your best option is probably to take advantage of the discount Sol-Ark offers, which is active through the end of 2024. You can find those details in my previous article.

    If you’re dealing with this issue outside of the United States, it looks like your best plan is to contact Deye directly to get the inverter activated again.

  • Issue Solved: Fronius MPPT1 dropping production

    Issue Solved: Fronius MPPT1 dropping production

    I’ve been fighting with two identically installed Fronius Symo Advanced (10kW) inverters over the last month, and I think I’ve finally fixed it. It’s very strange, and seems to be an issue in the firmware of the inverter, itself.

    The installation looks like this. They are two carports (only one is pictured), identically oriented, with north, south, east, and west arrays. The east and west arrays are smaller and hooked up to a Fronius Primo 3.8 on each carport, obviously using different MPPTs for different arrays. The same thing is the case for the north and south arrays: they’re hooked up to a Symo Advanced 10.0 at each carport.

    The problem is that MPPT1, hooked up to the north array on each carport, drops off during high irradiance days. Check it out.

    You can see when it starts producing in the morning, drops to nothing, then later in the day, it jumps back up and starts producing. Sometimes it takes until after noon, and sometimes, like pictured above, it comes back up when the irradiance dips and MPPT2 produces less for a bit.

    This only happens on higher irradiance days with good, bright sun, and on both carports. On cloudier days, both north and south arrays on both carports produce equally, as you’d expect with diffuse sun.

    Fronius tech support was no help with this one. We made sure firmware was up to date (fro34310 at the time, for those following along), but beyond that they were extremely confident that there was something wrong with our wiring or our array setup, but couldn’t give me proper direction. It may have simply been the one tech I was talking to, but he was extremely frustratingly not budging on his assessment. It doesn’t help that there are no error codes triggered with this problem.

    In troubleshooting, I couldn’t nail any issues to our set up for rapid shutdown devices; everything on site is rated to work with each other and is set up properly. Had some previous issues with dueling RSD transmitters tripping arc faults that I got sorted, so very confident that’s not an issue any more.

    When I was onsite, however, I was able to shut off DC to the inverter and turn it back on within about 10-20 seconds, and the inverter jumped up to the proper production on all strings, so it would seem there’s nothing instantaneous in the array that’s causing MPPT strangeness.

    Finally, I swapped MPPTs between arrays, putting the south array (highest producing) on MPPT1 and the north array (lowest producing) on MPPT2. After giving it some time, I think this one change solved my issue.

    You can see in comparison to the first graph, that the north arrays seem to have no more issues with dropping off in production. The south arrays didn’t have the irradiance on this day that they had in the previous graph, but it’s enough that the north arrays would have dropped off if they were wired as they were originally.

    My reckon is that this is directly related to the inverter wigging out when MPPT2 gets 5x or more the production of MPPT1, and only resets when MPPT2 stops rising. I’d imagine that most installations would put the main and highest producing arrays on MPPT1 by default anyway, so this issue would be very rarely seen. If you’re having this issue, try making sure MPPT1 gets the most production between the two, and it might fix it for you.

    Weird weird issue.

  • Solectria inverter power cycling

    At issue is a Solectria (now owned by Yaskawa) PVI 85 KW inverter that’s turning off and on. I was able to witness it powering off and on in the morning when I got there, but as the day went on, it stayed on. Errors present are “Power Derated” and “AC Contact Open”.

    Most recent was the AC contact open error, and very likely the main issue is the AC Contactor, but that “power derated” error makes me nervous that the DGMI is bad, too.

    The unfortunate thing about the DGMI possibly being bad is that Yaskawa no longer replaces DGMIs.

    It’s probably still likely that the contactor replacement is worth the risk. I’ll update as I know more.

    Update: Installed a new AC contactor as advised by Solectria, and it seems to have done the job.

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