wolfandy

You are already running ICC, right? Then I would rather get the Pylon comms cable from them and directly access the information from the Pylon BMS

Thanks a lot for the feedback, Chris. Appreciate it I had a similar experience when I flashed my last inverter. Flashing failed and display remained dead afterwards. But thanks to Coulomb and Webers explanations on AEVA, I also managed to flash it on the 2nd attempt

Thanks for the detailed insights, Coulomb 👍

Would you mind providing us with feedback here on how this is working in your parallel setup please? Do you get any error messages when putting one of your inverters (I assume the slave) into standby? And does everything work as normal when you wake it up again? I'm in a similar situation - and being able to avoid self-consumption of 1 inverter for 10h or so during the night will save almost 0.5kWh of battery

Charging 74A (2x37A) or closest value below this Bulk: 52.5V Float: 51.8V Back to grid voltage: 48V (this is where you need to play around and figure out what works best for you - and ensure that you stay above 20% SOC. The BMV will help you getting the right voltage) Low cutoff voltage (when your system shuts down): 46V

Really interesting, gents 🙂 Do you know how a parallel setup with 2x Axperts would behave if the slave was turned off through this command? And then later turned on again? Would we end up up with a bunch of error messages and an unstable system? Or could this actually work to turn off 1 inverter for the night to save on battery?

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I do not know. Based on the info from the AEVA forum, I would say it looks like a re-brand - however, I do not understand the comment further down in that post about Synerji. Maybe @Coulomb can help us understand?

I don't think that my old Axperts are capable of feeding back to the grid And when I originally looked at it, COCT had not made it very attractive (granted this was mid last year and things might have changed since then)

Is it a current or older one? I originally replaced the Axpert USB cable with another USB cable that I had lying around (had no idea how old). Eventually picked up a new one and since then the occasional hiccups that I had with ICC (e.g. dying on me when changing something via VNC from my iPad) have virtually disappeared Of course Have you asked Manie to look into your new freezing problem? Do you have VNC running and granted him access, so that he can dig around a bit? He's been able to help me like that in the past

No problems at all. My current runtime is at 156h Are you using the USB cable that originally came with the Axpert? If yes, then I would recommend replacing it with a current one. The original cable (older USB standard) can cause comms problems between the Axpert and the Pi And your Raspberry OS is also current/updated? Have you restarted your Pi after the update (usually not necessary, but might sometimes help)?

I would strongly recommend not going below 20% SOC - as apparently the lifespan on the Pylon decreases dramatically when doing so A screenshot from my ICC below. I have 4x Pylons though... (and am using R2.03/kWh for the calc)

All dip switches should be down (0) on both batteries (unless you for some reason need to change the comms baud rate). You only need to change these if you are running multiple groups of batteries (for which I believe you also require their hub). For running up to 8x Pylons together, no changes are necessary on the dip switches. You simply need to connect the batteries with the supplied link cables. The first battery (without anything connected to Link Port 0) is the master. See my setup as example:

The Axpert draws its self-consumption always from the battery - even if it is running in utility mode. So yes, this is perfectly normal in your case

Cool - happy to hear that fixed the problem On the one hand I am with you on that. But at the same time, my experience with Manie and his updates has always been outstanding - so I typically run the updates as soon as they are available

I am also running a Victron MPPT together with ICC. I am not having the issues that you are describing. I have never really timed the update frequency, but it is definitely more frequent than 60 seconds. Here is a screenshot of my PV watts graph What version of ICC are you running? If I remember correctly, then the update frequency in the first version that supported Victron MPPTs was still a bit sluggish - but Manie fixed that shortly afterwards Same settings on mine Here is what my MPPT tab shows (it's dark outside, so obviously some values are at 0) Have you tried different USB ports on the Pi?

I don't have any personal experience with them. But I think there are a number of posts of people here with Growatts I was also at one point contemplating of replacing my Axperts with something else (I was looking at Victron) - also primarily to be able to run more PV. But from what I've read, the inverter side of the Axperts is quite decent. So why replace the whole thing when really I only wanted to upgrade the MPPT? I instead decided to add a Victron MPPT (250/100) to my system and have moved all my PV (plus added panels) onto it. So my Axperts are now purely working as inverters (except for the rare occasion on which I need to charge my batteries from AC). ICC is also able to read the data from the Victron MPPT, so I still control everything through ICC. If I ever want to add more PV, I then have the option of either adding another Victron MPPT or connecting it directly to one of the Axperts

You only need to purchase 1 set of connection cables for the batteries to the inverter (or breaker/fuse inbetween) and is rated for 120A (meaning you can safely run 3x US3000 on it). The pack is just under R400. Each Pylon comes with the set of cables to connect to another battery Any standard 19" rack will work for the Pylons. I am using a Samson SRK12 12U rack, which can hold 4x US3000 I personally would rather go with the US3000 than the US2000 (can't really explain why - do not have any experience with the US2000). Even a single US3000 will 'work' with your inverter. You wrote in your initial post that you don't think that you'll draw more than 35A with your loads, so the single US3000 would be able to handle that. I would probably start off with a single US3000 (which is what I also initially did) and then add the 2nd once you have saved up the balance I have read somewhere that you can also mix US2000 and US3000 in a stack - but do not have any experience with that. Maybe someone else here does and can help out? I am running 4x US3000 Just keep in mind your 80% DOD, which means that this would give you 7.7kWh of usable capacity

As a first step, please try changing your 'AC input range' to Appliance. The UPS setting can sometimes cause it to only run on batteries If that does not help, please also post your battery settings and battery graphs pages

To be more specific: A single Pylon US3000 does not like to be discharged (or charged) by more than 37A (approx. 1800W). It can handle brief spikes (to my understanding we're talking about seconds) of up to 100A Continuous output rating of the 3kV MultiPlus II is 3000W and I would want to match my batteries to that (I do not own a Victron but am not sure if I would really want to push it to 5500W...) 2x US3000 can continuously handle up to 74A (approx. 3600W) and in my view would hence be a great match for the 3kV MultiPlus II

I think current street prices for the Pylon US3000 are just under 21k - which means if you can stretch you budget by a tiny bit more, you can get 2x US3000 I originally started off with a single Pylon, have since added bit by bit, and have now 4 of them in my system. Adding an extra Pylon to the stack is extremely easy and I have not a single problem with my Pylons ever

Great - happy to hear I can change these on my dual-Axpert setup without problems. Most of the time it is a logic-inconsistency that prevents the changes. The max AC charge rate cannot be higher than the Solar charge rate if I remember correctly. And similarly the cut-off voltage cannot be the same or higher than the 'Back to Grid' voltage The only thing that I sometimes also experience is that when clicking the 'Set' button to have ICC send the command to the inverter, it does not always accepts the change the first time around. But trying 2 or 3 times usually does the trick for me I do not have any experience with any other brands. I've had my one Axpert for more than 5 years and bought the 2nd early this year (used). I've moved all my PV to a separate Victron MPPT. A nice side-effect is that the Axpert does not get that hot anymore (with the MPPT not being used), which I am hoping will contribute towards a longer lifetime of the Axpert. I have also stuck computer fans on the outside of the case of the Axpert to lower the temperature (according to ICC the fans brought the temp down somewhere around 5-10 degrees) My plan is to get as much mileage out of the Axperts as possible and only worry about what to replace them with once they have broken down for good. Am otherwise very happy with my system (especially the ease of making changes in ICC remotely via VNC), so why spend more money?

Thanks Paul I think I know what causes the behavior: Did you manually change your system to Utility? If you want to manually change to Utility, then you first need to disable the 'Use SOC for Control' on your battery settings tab (and then press the 'Save' button at the bottom right for ICC to accept the new setting). Otherwise ICC (after a few minutes) switches your system back to SBU because it picks up that your SOC is higher than your set value and triggers the switch. Could you please make the following changes and see if your system behaves as desired (if I understand correct you want to run on Utility and charge the batteries from both Utility and Solar - correct?): Disable 'Use SOC for Control' on battery settings tab Set 'Back to discharge voltage' to 58V (or whatever else the highest voltage is that you can set - to ensure that the Axpert itself does not interfere with the ICC switching) Set inverter mode to Utility (in case ICC has switched it to SBU) A few further setting changes that I would recommend: 'AC Input Range' to 'Appliance' 'Bulk charging voltage' to 52.5V (see more details on why these values see this thread) 'Float charging voltage' to 51.8V

Can you please post screenshots of your battery settings and inverter settings tabs from ICC please? Just to ensure that this is not caused by any conflicting settings? And what Axpert models and batteries are you using?

I believe there are some posts here in the forum about that. I am only a user of the software, not a coder...