Jump to content


  • Posts

  • Joined

  • Last visited

  • Days Won


Everything posted by Youda

  1. Yes, PIP-5048MK and Axpert King are the same machines. RS485 cable for one of them will work with the other too.
  2. Yeah, the current 3-phase hybrid inverters from almost every manufacturer now are using HV batteries (where allowed voltage range is typically 200V to 400V DC). LV, aka 48V DC batteries are being used for 1-phase inverters mainly. Speaking of Pylontech, their HV and LV batteries are talking different protocols. Therefore, BatteryView version intended for US2000/3000 is incompatible with H48050 of Force H2. If you want to try it out, I have a BatteryView version for HV batteries as well. It works with H48050 (aka PowerCube-X1), but I don't know whether is will work with Force-H2 too. Anyway, RS232-to-USB coverter, together with a correctly wired communication cable is a must, of course.
  3. https://www.mppsolar.com/v3/download/
  4. In my opinion, the best hybrid mode is "Grid Tie with Backup II". Eastron meter is needed in order to get this mode to work correctly. In this mode, the inverter blends Grid+PV+battery power together. It allways try to compensate grid to zero: If there's too much PV power, the inverter lowers it's output in order to reach zero export. If there's a huge load on the backup or AC side, the inverter uses PV first, then battery, then the grid. You can also limit the amount of Power (watts) that will be pulled from the battery. If there's a need for more power than this limit, the remaining watts will be pulled from the grid. Logic: If you have some loads connected to the AC IN side of the inverter, these load will benefit from the PV, Battery and the Grid too. Once the grid is down, these load will go down too. They are not backed up. These load can be huge, there's virtually no limit on Amps. Whatever is connected between the grid and the Eastron meter, will NOT benefit from PV, nor from the battery. If you have some loads connected to the AC OUT side of the inverter, these loads will benefit from PV, Battery, Grid. These loads will be backed up even if the grid goes down. These loads have a current limit of approx 21A. For a shame, this mode does not work with NetMetering because it aims at 0 export. If you have an excess power generation, fully charged batteries and small AC loads, the inverter will lower it's output. If you want to use NetMetering, the best mode is "Grid Tie with Backup I" In this mode Eastron meter must NOT be installed. The logic is very same like in the previous mode, but with two exceptions: All the loads in the house will benefit from PV+GRID, no matter where they are connected. If you have excess PV generation, all of it will be fed to the grid. In most of the countries, there's a limit of roughly 3700W set in the inverter's configuration. Feeding the battery to the grid By default, feeding the battery to the grid is disabled in all the modes. However, if you really want to, you can manually tick "allow grid feed-in" + "allow feed-in battery to the grid". Then the inverter will send all the excess PV generation to the grid, up to a defined limit (normally 3700W). And if there's not enough PV, it will discharge the battery to the grid too. Again, up to a total limit of 3700W by default. For a shame, it's not possible to control battery discharge based on the SoC. It simply discharges the battery up to a point where the low-voltage threshold kicks in.
  5. Yeah, I know that it might sound strange but I'd like to stay objective whenever comes to judging something (or someone). Some other people are not able to criticize a product if they just spent a huge amount of money on it. For example, a Mercedes owner rarely tells you that there's something bad on the car and that if he had a second chance he would go for a Bentley instead. Also, some people are recommending a product just because they don't want to be only ones who's using it. Even if they know that the product is a bit sh*tty. The case with my InfiniSolars is that I'm okay with them. I know how to manage these machines in my setup, I know how to remotely read operational values and execute commands. But there's a lot of drawbacks and painpoints too and it took me a while to found out. Based on the experience that I've made I have to say that for almost every use case there's a better product available. For example, Axpert is much more efficient and way cheaper for the offgrid solutions. GoodWe is more efficient, more compatible, more intelligent as a hybrid. Victron has much bigger scalability, frequent firmware updates and has a complete ecosystem of devices for automation, monitoring and other accessories. So, yes, I'm happy with my inverters too, but if I will build another house in my life, I will choose a different hardware. Not sure what exactly, but at least I know what features I want and what pitfalls to beware of
  6. This is pretty normal, like @plonkster explained. If happens once a while then it's okay. But, if that happens everyday, then it means that the real capacity of the cells is much lower than what's hardcoded in the BMS FW. Everyday jump from 90% to 100% is okay. Everyday jump from 76% to 100% is not.
  7. Hi guys, based on the fact that many forum users are trying to understand how to use Pylontech batteries efficiently, I've extracted some of the internal configuration values. It's from a stack of 8xUS3000. What instantly catched my eye are especially these values. So I added a couple of my comments and thougths: Total Num : 8 //Number of maximum daisy-chained bricks supported by the firmware. Present Num : 8 //Number of actually daisy-chained (RS485) bricks. Shut time : 72.0 H //If the brick is not charged/discharged for 3 days, it will auto-power off. Balance Volt : 30 mV Balance Start : 3360 mV //Looks like the BMS is able start balancing cells at this voltage it's not //a static top-balancing, as I know that the BMS chip is able to stop balancing //at a much higher voltage, if all the cells are at roughly the same voltage level. Recommend chg voltage : 53250 mV //This is what inverters like Axpert are reading //from the BMS and using as CC. Over VoltageR : 51000 mV //Strange, that this is triggered at 51V, given //the recommended CC=53.2V. High VoltageR : 52500 mV High Voltage : 53900 mV //Just 650mV of margin between recommended CC=53.2V and alarm. Over Voltage : 54000 mV //Just 750mV of margin between recommended CC=53.2V and panic. A complete list goes here. Please note that the column "Battery" means actually a CELL while the column "Power" means a single US3000 BRICK: Protect Attribution --------------------------------- Item Battery Power Over Voltage : 3700 54000 mV Over VoltageR : 3600 51000 mV High Voltage : 3650 53900 mV High VoltageR : 3500 52500 mV Low Voltage : 3050 46000 mV Low VoltageR : 3100 47000 mV Under Voltage : 2900 44500 mV Under VoltageR : 3250 49000 mV Sleep Voltage : 2500 38000 mV Charging OT : 61000 61000 mC Charging OTR : 55000 55000 mC Charging HT : 59000 59000 mC Charging HTR : 55000 55000 mC Charging LT : -9000 -9000 mC Charging LTR : -5000 -5000 mC Charging UT : -11000 -11000 mC Charging UTR : -5000 -5000 mC Discharging OT : 61000 61000 mC Discharging OTR : 55000 55000 mC Discharging HT : 59000 59000 mC Discharging HTR : 55000 55000 mC Discharging LT : -9000 -9000 mC Discharging LTR : -5000 -5000 mC Discharging UT : -11000 -11000 mC Discharging UTR : -5000 -5000 mC Charging OC : 102000 mA Charging OC Alarm : 50000 mA Charging OC AlarmR : 40000 mA Discharging OC : -100000 mA Discharging OC Alarm : -50000 mA Discharging OC AlarmR : -45000 mA OC Delay : 15000 mS OC Release : 60000 mS Charging OC2 : 200000 mA Discharging OC2 : -200000 mA OC2 Delay : 100 mS OC2 Release : 60000 mS Discharging SC : -400000 mA SC Delay : 0 mS SC Release : 60000 mS Charging Max Cur : 10000 mA Balance Start : 3360 mV Balance Volt : 30 mV Shut time : 72.0 H BUV/PUV time : 2400 S Sleep ctrl state : OFF Sleep every day StartTime : 20:00 EndTime : 08:00 HwSleepInfo HwSleepStatus : OFF HwSleepTime : 6 S HwWakeupTime : 60 S Data Save every day StartTime : 00:00 EndTime : 23:59 Save Interval : 1800 S Power System Information --------------------------------- System is idle Total Num : 8 Present Num : 8 Sleep Num : 0 System Volt : 49381 mV System Curr : -367 mA System RC : 352367 mAH System FCC : 585266 mAH System SOC : 60 % System SOH : 99 % Highest voltage : 3294 mV Average voltage : 3292 mV Lowest voltage : 3290 mV Highest temperature : 23000 mC Average temperature : 21875 mC Lowest temperature : 21000 mC Recommend chg voltage : 53250 mV Recommend dsg voltage : 47000 mV Recommend chg current : 296000 mA Recommend dsg current : -296000 mA Hope this helps all the young scientists that are developing their own monitoring and control solution for the batteries and inverters Youda
  8. The download is in my LAB thread, link to LAB is in my signature. There is a long post with pictures and the actual file is attached at the end. More than 200users dowloaded it already, you can make it too
  9. Trust me, it's not possible for LiFePo4. With some other Liion yes, but not here. The only way to determine the correct SoC is counting in/out amphours. So Victron BMV700, shunt, coloumbmeter. And since BMS already has this circuit implemented, the most obvious way is to communicate with the BMS. But don't worry. I would say that within 5yrs this feature (custom top-bottom charge/discharge based on the true SoC and BMS communication) will make it to the inverters In the meantime, you have to code your own middleware, if you want this.
  10. For a shame, it's not that simple. The SoC/Voltage curve of the LiFePO4 batteries is so flat that there's almost the same voltage anywhere in the range of 20-80% SoC. Even in the 80-100% range you cannot say what's the SoC based on the voltage. It's like behaving like 80%...80%... and now suddenly 99% and 100%. Technically, the feasible way is when the inverter actively talks to the battery BMS and once the BMS reports 90% SOC the inverter should stop charging it. But, like I said before, I don't know any inverter that is able to use such a rule. For the high-voltage batteries (200-400V) the common practice is that the inverter charges to 90%, then stops charging. For example SolaX X3 Hybrid operates like that. But in the 48V world, if you want to have this feature, you have to implement your own monitoring solution that will communicate with the battery via CAN or RS485 and then instruct the inverter to start/stop charging. It's doable even in my current homebrew monitoring, but I'm too lazy to code it...
  11. @Rclegg just check the whole thread you will notice the reason for that short period: @Pren mismatched DoD and SoC in his description. In reality, he's using just 1.4kWh out of 2xUS3000 and then he's switching to grid. Basically treating 7kWh of lithium like 7kWh of lead-acid
  12. Personally, I'm cycling my US3000 stack between 100% SoC and 40%SoC. Once discharged to 40% SoC, my system automatically switches to the grid. Since manufacturer's specs allow cycling between 100% and 10%, I have a lot of margin here. BTW: Technically, it would be better to cycle these between 40% SoC and 90% SoC daily, while allowing a full charge (100%SoC) only once a week, to let BMS reset amphours counter and balance the cells. But as far as I know, no inverter on the market has ability to set such a complex rule.
  13. Are you sure that you are not confusing DoD with the SoC? 80%DoD means that there's roughly just 20% of energy left in the battery. Such a deep everyday cycling cannot be called "wasting of a potential" as consuming that last remaining 1.4kWh won't make any change but it will kill the batteries for sure. In the US3000 BMS the 9%SoC is hardcoded as a lower limit. Once you discharge US3000 to this limit it will auto-shutdown and log an error to its NVRAM.
  14. Grid feed-in is limited to 3500W because of legal requirements of most of the countries. Therefore, the inverter will never push more than 3500W to the grid. Now it depends where you have your loads connected. If you connect some more loads to the AC-OUT side of the inverter, you should be able to get more power from the inverter. Contrary, if all your loads are connected to the AC-IN side of the inverter, they will never use more than 3500W of PV. Especially, if these loads are connected BEFORE the Inverter's energy meter which is a common mistake that I've seen in some other installations. Since your system is grid-tied installation with grid feed-in enabled, I assume that most of your loads are on the grid side (AC-IN). So just check whether they are connected before(wrong) or after the meter (correct). Moving some of the loads to the AC-OUT is the quickest test to see whether you can draw more power from the panels. BTW, you CAN change the limit of 3500W to 5000W for example, but that would be illegal in most countries. Therefore, don't do it please.
  15. @twingall1 There are two cards available: Modbus Card - for the communication with the energy meter BMS Card - for the communication with the Pylontech For a shame, there's just ONE SLOT and none of the two cards is able to provide both functions at once. Buy a BMS card instead, throw away the meter. OR, if you want to have both functions together, just contact Voltacon support. But from my experience it's not possible. An alternate way would be to ulitize 3rd party solution to communicate with the Pylontech and control the inverter. For example Manie's ICC. ICC does support some InfiniSolar models, but I'm not sure whether InfiniSolar E is supported too. Just ask Manie first. Yes, incorrect SoC is obvious, same for the incomplete charging. 3rd party monitoring solution will fix this. Just have to warn you about sleeping/waking up the batteries. That "sleep" is in reality an emergency action of BMS. It means that you've discharged your batteries too much and the cells are starting to suffer from low-voltage. Every time you let this, you are gradually killing the batteries. Buy more batteries or switch to the grid much sooner, so the batteries will not be drained every day. The MPPT of InfiniSolar E can take up to 6500W, but it's built-in battery charging circuit is limited to 2880W. All the remaining power has to go into the AC loads. So, if there's not enough loads, the power output of the inverter will be limited. In order to check this, just connect some more loads and watch the power going from the PV strings. By the way, you've picked the worst model from the whole InfiniSolar line. For example, InfiniSolar 5K Plus (or InfiniSolar 10K 3-phase) is much better. Next time, go for a Victron solution or carefully choose some all-in-one hybrid from the GoodWe product line.
  16. It's 25 and 29 or 39? A slight temperature difference is normal, as heat tends to build in the upper levels while lower levels stay cooler. Therefore, the top bricks are always a degree or two warmer than the bottom ones. Temperature 25° vs 29° is okay, I'm seeing a similar difference in my lab. On the other hand if that's 25 vs 39 on that picture, then it's way too much and something bad is happening.
  17. Hi @Power Me The main reason for the lack of PV based DC-to-DC EV chargers is that it would be a niche product. Such devices will eventually appear on the market, but it will take years from now. Speaking of communication this problem is already solved: While the AC chargers are using PWM, the DC chargers are based on CAN BUS. There's also a second type of DC chargers, based on ETHERNET communication. But these are being deployed only in China. Prices of the EV's, expensive batteries and the "support" of the goverment(s) is a very sad story. But SA is not alone, here in Europe some countries do have subsidies, some other have not. It's not even harmonized across the EU. Personally, I would say that the biggest think for the e-mobility will be the time when corporations will start to buy EV's for their fleets and later this EV's will hit the secondary market. There's not much people who can afford to buy a brand new ICE vehicle, and even less people can afford a brand new EV. There was a smart move from some of the manufacturers, for example Renault and NIO. These two offer an "empty car" where the battery in the car still belongs to the manufacturer. Therefore, the consumer don't have to pay CAPEX nor duties for it, but he's renting the battery with a fixed monthly fee. To be honest, I don't like this business model, but for some other consumers this could be the way to get their hands on a brand new EV. BTW: Owning a Volvo or Polestar EV would be so cooooool!
  18. Last year, I added a wallbox to my solar, for charging electric vehicles. It's a single-phase 32A, so the max charging power is roughly 7.5kW. Some details are written in my previous post here: https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/?tab=comments#comment-58507 Personally, I don't own an EV, but for the nine months in a year the solar production is so excessive, that I have no use for all that power. Therefore, I offered EV charging for free and published the wallbox location on the PlugShare.com and on some other local charging maps too. Since then, curious EV drivers are stopping by, mostly just to check whether the charging a car from solar is really possible. And yes - it is Some of the cars that stopped for charging were Mitsubishi (hybrid), Citroen C-Zero, Hyundai Ioniq, Fiat 500e and the last one, just couple of days ago, was Hyundai Kona. Hyundai Ioniq: Fiat 500e: Hyundai Kona: Most of the drivers are charging just for 30 minutes or so, which equals to 3-4kWh and 15km of range. On the chart below, it's marked as "EVSE". If I do remember correctly, just one driver stayed longer than hour and took 8kWh. That equals to 30-40km, based on the model of the car. By the way - is there anybody else on the forum, charging his EV from the off-grid solar? If so, do you offer free charging to the other drivers or not?
  19. Good morning @Coulomb yes, of course, the sponsorship offer i still valid Personally, I have InfiniSolar in my setup, but I have a past experience with an Axpert too and I know that it's a good value for the money. Since thousands of people all around the world are using Axpert flavours, it makes me a sense to support the improvement of the machine. While the logic about waiting for a stable firmware first is reasonable, I would say that it might be a bit uncomfortable for you and @weber to come back to me later and say "Hey Youda, the firmware looks stable now, please send us the funds." That's the situation I do not want to put you in. Therefore, I would prefer to fund you right now. I perfectly understand that you will wait a month or two with the actual HW purchase, and I am okay with that. Like I said before - there are no other conditions, nor strings attached. I will PM you right now....
  20. Hi @Coulomb @weber I see that you've done a lot of work for the PV community, namely when comes to improving firmware of a numerous Voltronic Axpert inverters. I noticed, that you're giving your time for free and also do not posses a sample of Axpert King, which greatly limits your ability to continue with the firmware testing and development. Although I'm not personally using any Axpert, I am a big fan of self-sustainability and renewable energy sources. Therefore, I'd like to help you a bit: I am publicly offering you a one-time sponsorship of 1000 USD, so you will be able to obtain necessary Axpert King sample. There's just one condition: you will include me as a HW sponsor in the Readme.txt file of all the future releases of Axpert King patched firmware. If you do agree, just send me your PayPal address in a PM. This is not a joke. Youda
  21. Sounds good. Looking at the pictures, I see that you are using Grid-Tie mode. From the absence of Eastron modbus meter, I would assume that you have disabled grid feed-in, which is okay. Please, try these two tests: Test1: disconnect AC-IN from both inverters check the load split turn OFF one of the inverters check whether the 2nd machine will take over seamlesly Test2: keep both inverters disconected from the grid attach roughly 6kW of loads check the load split All of the InfiniSolars that I've seen has been on a kind of v1 firmware. Internally, there are more versions, but the machine is always reporting v1 or something like this, regardless of real firmware version that it's running. The problem is that Voltronic (original manufacturer) is not publishing firmware downloads freely on the internet. This applies not just to InfiniSolar, but to the Axpert portfolio too. The only way to get hands on a new firmware is to fill a complaint with Mecer, include SNs of both machines and push Mecer to get the firmware for you. It will not be really easy, and the Mecer might ask you to ship the machines to their shack in order to perform the upgrade.
  22. Hi @RudieB 1) First of all, it would be beneficial to upload photos of the current setup. Especially wiring of AC and DATA cables, circuit breakers, where exactly are the GRID and LOADS connected. 2) Startup sequence does not really matter. 3) As a quick test, connect roughly 500W of AC loads and then power-off Master InfiniSolar unit (by pressing ON/OFF button). The Slave InfiniSolar should takeover seamlesly. If not, something is wrong in your environment.
  23. I'm really sorry @Luminous , but there's not much interesting to share. Just everyday's boring stuff. For example, I had to clearly label the bays in my space-shuttle landing dock, as some (female) family members were not able to clearly understand where they should (NOT) park: Based on the current situation in the world, I upgraded to the AirLock. You know, just in case something goes wrong: And yes, I bought another rack cabinet, so if I will accidentally become a billionaire one day, I will not have a problem with storing some additional lithium for my LAB:
  • Create New...