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Youda

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Youda last won the day on August 7

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  1. https://www.mppsolar.com/v3/download/
  2. 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 limi
  3. 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.
  4. 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.
  5. 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
  6. 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
  7. 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.
  8. 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 batteri
  9. @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
  10. 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.
  11. 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.
  12. 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 installati
  13. @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 exampl
  14. 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.
  15. 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 c
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