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JacquesVDM

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Everything posted by JacquesVDM

  1. So if L is shorted to E, the fault current will run to E and through the E/N bond to N on inverter? That seems logical. But if I have a RCD, any fault current flowing to E would trip it?
  2. When the relay operates, it would be when the load is supplied by the inverter and the grid supply is disconnected. Where and how would a fault current flow? I can understand that if you link N and E permanently and the grid's Neutral is cut or broken, then all current (fault) would flow through the link to ground. But if it is not using the grid / battery mode there can't be current flowing through that E/N bond. Or am I missing something?
  3. What level of current would flow through the earth/neutral bond relay? Can't the dry contact relay (from setting 38) just be directly connected between N and E? I see it is rated at 3A/250vac. Just asking
  4. I didn't want to say anything at first, but am also thinking that those two panels that are on a different angle will pull the rest down to its production output. Could you possibly disconnect those two from the rest of the string?
  5. Hi. How about some pictures? Always nice to see other installations. I currently get 3600W out of 4000W my array, which equals 90%. All North @ 26 degrees pitch.
  6. Hi guys. If I have three Sunsynk 8kw's in a three phase setup, can I connect a single phase generator to one inverter to only charge the batteries? It is not to power the load, just to charge the batteries if needed. There will be no Eskom available. Thanks Jacques
  7. The past weekend I just hosed my panels off with water. Getting about 6% more after cleaning.
  8. I have my genuine Axpert set to 52.5V and have zero issues or alarms. Going nearly 3 years. In the beginning I had it at 53.5V and had a few OV alarms. But since the drop to 52.5V no alarms and batteries goes to 100% each day.
  9. @HubbleLithium, maybe you can help?
  10. 3x Victron Quattro 15kVA with RiOT cloudlink. I know I can see the SOC via the cloud, but I need a physical output such as a relay to control stuff.
  11. Hi everyone. Does anyone have the comms protocol of the Hubble AM-2 batteries? (RS232 preferred) I want to design a controller to activate relays at certain SOC levels. Thanks Jacques
  12. @Scubadude, Yes through RS232 and then using the "BatteryView" software to get info of the batteries. Just search for "BatteryView" on this forum for the software.
  13. Battery Brand/Model: 4x Pylontech 3000's Installation Date: 1 June 2019 (Production date: 8/3/2019) Cycles: 423 (as per BMS) Performance: have not noticed any degradation
  14. Hi Guys, Thanks for all the info. Will start working through all of the links. Don't have the batteries yet. Also not sure which inverter(s) we are going to use. Currently having a look a Sunsynk and are supported by Bluenova. Will post an update "if" I come right with the protocol/interface.
  15. Good day all, Does anyone know the communications protocol of the BlueNova BN52V-xxxx range? Looking at designing a controller (Raspberry Pi / ESP8266 / ESP32) to communicate to the batteries and operate relays based on SOC. Or have anyone maybe designed something like that? Thanks Jacques
  16. Good day everyone, I am building a UPS / backup type of system for a office or two. It is mainly for loadshedding and power outages. Maximum power usage is 2000w and must last for the 2.5hrs loadshedding. It is a few PC 's and test equipment. What I have in mind is: KODAK King 5kw and 2x Pylontech US3000C batteries Peak power would be 3.5kw (limited by Pylontech's 0.5C which is still above the 2000w requirement) Backup duration would be 2.8hrs if run down to 20% Recharge time would be 2.5hrs if run completely down (60A AC charge which is below the maximum for 2x US3000C's) Any other suggestions or possible problems with this? Thanks guys Jacques
  17. My gas geyser usually shuts off for one of two reasons: Overtemperature or Flow too low. I have a shower with one of those thermostatic mixers and if I try and adjust the temperature, it shuts off due to overtemperature - the thermostatic valve reduces the hot water flow which increases the geyser temperature until it overheats and shuts down. Solution: keep it on maximum temperature on the mixer and control the temperature with the amount of flow. On my other shower with a "water saving" head, if I don't have enough flow, it also shuts down. Also the ideal would be to have the settings on the gas geyser such that cold water is not needed to be added. This is just my experience - maybe it will help.
  18. Thanks Coulomb. Also thinks it would just cut off the load if overloaded without bypass. Another question maybe you can answer: is there a difference in the switchover time the inverter switches between grid and battery with setting 3 (Mode: APL/UPS). I have noticed that when the switchover occurs, I can hear it on the aircon motor. If I recall someone mentioned the switchover time varies with setting 3 - just need to confirm.
  19. Hi everyone. I have a 5kw Axpert inverter with 4x Pylontech US3000's and 4kw of solar panels. The whole house except the stove is running on it. Running now for more than 2 years without any issues and we stayed below 5kw easily. (Base load is about 500w and thus can run two "big" appliances of 2kw simultaneously. Lately we are using more power with working from home, cold weather, etc. and I have set the inverter to "bypass" on overload, so that in the case of someone switching on a kettle and we do exceed 5kw. I have noticed that when at about 3kw and a fridge starts up, it bypasses to grid. It is annoying and now my question: what would happen if the "bypass on overload" setting is disable and I exceed 5kw? Would it just shut down or will it in any case switch to grid to protect itself. I don't want to test it myself and damage something. Maybe someone have experienced it? Thanks guys
  20. Having the same thing with a Axpert 5kw and Ender 5 3D printer. I believe it is the pwm of the heating circuit of the 3D printer that is causing it. The inverter is too slow to reacted to the current draw variations due to the pwm. It does it on my coffee machine as well. It is the same with a big load (say 2kw): the lights flicker when the load is switched on or off. The inverter is too slow too react to the sudden change in current that must be supplied. It happens on the more expensive "blue" inverters as well. There is a YouTube video on that. I am also concerned about the constant flicker as the printer does run for extended periods of time. Does anyone have a solution what can be done?
  21. According to Sans 10142 an indicator lights needs to be installed for alternative supplies such as inverters. Question is: Do that indicator light need a "Control breaker" to protect it. I know it is stupid and I would not add it as it would "bypass" the function of the indicator light and one would think the panel is safe to work on if that breaker is switched off. Would just create a greater hazard if installed. The question comes because of a failed COC and that is one of the requirements according to the electrician.
  22. Hi Bloubul. I have actually changed the solar geyser element to a 2kw shortly after that post of mine. In the winter I have the geyser wise set to switch the element on at 1pm until 2 pm with a 60 degrees setpoint. And also do a short 15 minute top-up in the mornings. The winter time is mostly cloudless and it works perfect to use the extra PV as the batteries are fully charged at about 11. The summer is a different story as the rainy / cloudy weather is unpredictable. I then do not use the element and then switches over to the gas geyser for the days when the geyser temps are low. The solar geyser heats up much higher in the summer and not much hot water are needed/used.
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