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Daranger

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Everything posted by Daranger

  1. Hi all, an update on my situation. Somehow when we tried to downgrade to 121204 we didn’t just brick the unit, we actually blew a bunch of components in the unit. It went to Segen Solar for repair. Communication with them was very challenging initially and it took over a week before they been took a look at it. After that however they were much more responsive. They helped me file a warranty claim which Goodwe approved. The result of it all is that I have a completely new inverter running 171708. I specifically requested that it run 121204 as this was the only one I had found that ran the SOC calculation correctly when not using a BMS. I hadn’t tried 171708 though and so far the SOC calculation seems to be working perfectly. So far so good! Just pleased to have the system up and running again.
  2. So things got dramatically worse today. We attempted to downgrade to 121204 again and somehow in the process the unit got corrupted. So it is now completely bricked Load shedding is on the horizon and my system is going to let me down yet again.
  3. @Dee Bee great thank you, I would appreciate that. In the meantime I am going to try downgrade back to 121204 to fix all the stuff I broke with the latest "update".
  4. @Dee Bee My solution is a bit ham fisted. I have published SOC vs open circuit voltage graphs for the battery I am using and I am comparing those theoretical SOC figures to what the inverter is showing. I like the idea of using the BMS to “trick” the inverter into thinking there is an actual LG battery. Did you connect it to the CAN bus?
  5. Hi all, sorry it has taken me a long time to respond. In short I have not ended up with a suitable solution to date. Been a very frustrating process. Here is my story as it has unfolded: - initially the system was loaded with 1414x software, this is where I was experiencing the SOC calculation issues - then we upgraded the software to 1515x, this did not solve the SOC issue - eventually we downgraded to 121209. This mostly fixed the SOC issue in self define, it was still fairly inaccurate (10-15% out) but at least it worked. I ran it in this mode for the last few months. Things worked better in this version but I had intermittent issues with little bugs in the software the most recent of which was that the system would lose connection with the meter for half the day and switch off self use mode. - I then “upgraded” to what is supposed to be a more stable version as suggested by Goodwe, this version is 121206. I did this two days ago. It seems to have fixed the meter issue but sadly has caused a whole host of new ones. The battery wont charge (overcharging error) it also wont discharge on occasion. So sadly I am back at square one. I am interested in the idea of using a custom BMS, do you have any more details on how it will work as a simple reporting BMS to trick the Goodwe into seeing a SOC? I had no idea it would be this hard to get such basic functionality working. The sad thing is I know my batteries are far better than I would get if I went the PylonTech route but it seems that may have been the better choice in hindsight. I am strongly considering getting rid of this inverter and finding another that will be more suited to my requirements.
  6. Dont be too disheartened. If you use the product with a standard battery like Pylontech I am sure that you will have a better experience than we have.
  7. Just an update for everyone here. We are moving at snails pace with Goodwe but I am still trying. I have asked my installer if they would be able to swap the unit for the Solis hybrid inverter. Does anyone have experience with this unit? It has a nicely laid out user define section for the batteries which is what I need.
  8. Sorry to hear that Heinz. I agree the hardware so far is great. Completely silent and so far very reliable. The frimware and user control on the other hand. Can you PM me your email address so I can add you to my conversations with the local Goodwe team? It might help if there are two of proving that there is an issue. Mostly they keep trying to find fault with my batteries which is clearly not the problem here. I would be happy with two solutions: 1) find a way to fix the SOC calculation or 2) insert user-controlled voltage cutoff values on the app for the on-grid and off-grid discharge values. This is even easier to do (even Axpert offers this).
  9. Strange, I could get the files no problem. I had the installer come over yesterday and downgrade the system to 1414. Sadly I am seeing no change, the SOC is behaving exactly the same and is unusable. This is becoming really frustrating and I am worried that this lack of control is going to damage the batteries. This is such basic functionality and I am getting no joy from Goodwe. Is there another inverter that someone would recommend rather than this one? I picked the Goodwe one because I need the IP65 functionality.
  10. Heinz, I'm sorry that you are experiencing the same issue but at the same time pleased to hear that it is not just me . I like your workaround but obviously not a long term solution. I have the same 5048 serial starting 9 and running latest firmware (15158). I have spent some time trying to understand what it is doing. Essentially it seems to have no correlation to the voltage at all, the SOC only responds to instantaneous current, also no correlation with current over time. When there is a charge current the SOC drops, the larger the current the larger the drop. When there is a discharge the SOC stays at 92 or 96%. I have tested this on nearly every profile available and the results are identical. I have been working with Goodwe's local support team as well as my installer. Goodwe is saying that they think the new firmware (1515) is the problem and they are recommending that I downgrade it to the 1414 version. Heinz, here is a link to a document that will help you and direct you to the correct firmware: https://portal.wholegreen.co.za/reseller/docs/Full Firmware Update Guide.pdf Unfortunately, my laptop has only usb-c ports and I cannot get these to work with the inverter despite having the correct cables. Goodwe is suggesting that I try get hold of an older windows 7 laptop and use that .
  11. Gave this a try, unfortunately still not working correctly. Completely baffled.
  12. Hi all, First post for me Last week I got a team to come in and install a solar system for me. I went with 16 330W panels in an E-W configuration and a Goodwe 5048ES inverter. The one odd thing I did was I got hold of two LG Chem Telecoms Spec batteries (I work in the industry). These batteries are essentially the same as the LG Chem RESU 6.5kWh units but I got them for much much less. The problem with these batteries is that they are not designed to communicate with residential inverters. I am assured that this isn't a problem. They told me to just treat them essentially like a lead-acid unit, charge them to 57.2 (92% SOC) and discharge to around 51V (40% SOC) for on-grid cycling and when there is an outage run it down to around 47.6V (10% SOC), the internal BMS will manage the rest and I can connect a computer to it if necessary. Seemed easy enough and, by all accounts, I have set the system up like this. After the system was installed all seemed well initially but the Goodwe unit only works on SOC for setting the cycling points. That shouldn't be a problem, in theory, I don't need it to be exact. The problem I am having is the inverters SOC calculation is not just off by a bit, it is completely and unusably wrong. I have attached some charts that I pulled from the system. Looking at them you will see that the SOC is almost working backward. When the battery is discharging and the voltage dropping the SOC remains relatively constant, then when the sun rises the battery starts to charge, the voltage increases and inexplicably the SOC starts decreasing!!! Then around 11 am a large load kicks in and the battery starts discharging and the SOC jumps back up to 96%. I am completely stumped. I thought this was a basic calculation based on Ah in and Ah out but this seems to be behaving very bizarrely and, unfortunately, the SOC figure is core to the functionality of the system. It has been through 2 charge and discharge cycles with not much sign of improvement. The installer, despite knowing my requirements ahead of time, is claiming that he is out of his depth and cannot assist. I have contacted Goodwe who put me in touch with a local distributor who has been helpful but not really taken the time to actually understand the issue. They just told me to change the systems battery capacity to represent usable capacity (which I had done already). Is there anyone out there that is using an inverter like this without battery coms or with a lead acid battery that could assist? I have yet to try the following: running the system on more cycles and seeing if it corrects over time setting the system to "default" which doesn't let you set the capacity and hoping for the best setting the system to the LG Chem RESU 13 and hoping it works without coms riping the unit out and getting a much cheaper Axpert inverter which seems to perform functionality no problem Thank you in advance for any advice that you may have! Daranger.
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