Recent content by yasko

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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @cielak94, regarding the Chevy Volt battery - yes, it's possible to connect the battery to the inverter without a teardown, but I haven't tested this. There are some obstacles to resolve, and I'm not sure whether it's worth it for this battery: We need some additional hardware to control...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    Hi guys, I was pretty busy in the last few weeks with some other projects and postponed the work on my solar ESS. But now I'm back and planning to make new steps ahead. The hardware for the new CAN bridge is ready, and I hope in the next few weeks to port the current software and make some...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @curto, the GW6000-EH comes with GM1000 smart meter with a single CT. GM1000D (with dual CT) is for retrofit systems. Some description is here. I've just updated the MODBUS map for the inverter in my repository. I've cleaned it, and now it is more accurate. The registers starting with 3xxxx are...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @NexGen, there are some things to check: read this post, and there is a map between the content of CAN frames and inverter registers. Also, check the BMS registers. There is a brief description is here. The app checks resisters in the range 37002-37009 when performs battery switching. You need...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @NexGen, It looks like the inverter or app doesn't accept the default battery. My inverter is on the 0313 firmware version, and the app is on 4.2.9, and mine is 1 phase. Yours is 3-phase and with a higher version of ARM firmware (16 vs. 13). Maybe it expects some more parameters. If you have an...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @NexGen, your data looks OK, and your BMS status is normal. What are versions of the inverter's firmware and PV Master App? And what happens when you select a default battery in the app? In my case, when I go to default battery, there are two options - 25Ah and 50Ah: After selecting one of...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    Hi @curto, the Modbus map is here. I'm not familiar with the SBP5000 inverter and can't guarantee that it uses the same Modbus map as the EH series. With GW6000-EH, it's possible to discharge the battery to the grid, which I think is also valid for SBP5000. I've made some tests with my inverter...
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    Dala's solar-powered workshop (+DIY powerwall coming)

    Hi Dala, It is going to be an exciting project. I think it's possible to reverse engineer the battery protocol. I had to chance to do it with a Goodwe inverter without having the proprietary battery. The project is here, but my inverter uses a CAN bus communication. One of our forum members...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @bikefish, you are correct. The green line is the energy meter for the grid. I'm trying to keep it at zero. I don't have a license for energy export, so the best I can do is maximize my self-consumption. I have a low consumption during the mentioned period because I've limited the charging power...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    In the last few weeks, I've monitored the inverter's work (I have tons of logs) and tried to understand the algorithm of the self-usage mode. What I've found so far: When the PV voltage rises above 100V, the inverter stops battery discharging and starts charging, no matter if there is still no...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @apr, I think that the key to charging the battery on demand lies in my previous post. You can use register 47511 to switch the inverter to battery charge mode (value 11), then in register 47512, you can set desired power level. The inverter first uses available PV power for charging, and if...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @apr, thanks for the data. I will write about this later. Regarding the off-grid output of the inverter, I'm still not using it ( the grid is relatively stable here). But it's working as expected, and I've only enabled it via the app. I also have some initial problems with it because I forgot to...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @apr, Nice setup with node-red. I don't have an original MODBUS specification, so I can't guarantee its accuracy. The description is extracted from these files. I'm glad to hear that your inverter is working. Did you notice some extra consumption from the grid when the inverter charges the...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    A quick update from the last days: Communication via UDP port works well, but the inverter adds a two-byte header - 0xAA, 0x55 to the reply message. I've done some research regarding the power control of the inverter, and it's possible to control it in real-time. So, the inverter can be used as...
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    High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

    @apr, my firmware version is the same 030313. I've decided to check how the app communicates with the inverter and found that it uses UDP protocol at port 8899. It sends a MODBUS -RTU message over UDP, and the inverter replies in the same way. So that is another way to talk to the inverter...
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