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NoordSolar

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Everything posted by NoordSolar

  1. A friend of mine just had a Sunsynk 8KVA and 2x FreedomWon 10/8 installed, however the the two freedomwon batteries do not track each other , usually 10 -15 % apart but at times more than 50 % different . At full charge they both are 100% SOC . I'm too far away to go and check it out but am hoping someone has seen this phenomena before. Installer has been in contact with Freedom Won but between the two of them they cannot get this right/
  2. Never saw that one , but I need at least another decimal point , hoping the Rhomberg DHC7P-HZ or DHC8-HZ will do so.
  3. I found this one https://www.acdc.co.za/products/frequency-digital-panel-meter-3-digit-100-240v-72x72x48mm?variant=30475711244 . However cannot find any meaningful specs on it . How does it display 50.1 Hz for instance ? 501 , 50.1 , or 50 . Datasheet here does not say http://storage-download.googleapis.com/spec/DHC3P-HZ.pdf
  4. Looking for a smallish mains frequency counter to monitor grid frequency ? Has anyone come across one
  5. Is the Etower a 15S or 16S design
  6. 3 times as many connections - connections are a high failure point , larger cells might enable better usage of available volume - its all a compromise - You could go for tiny 6AH cells and really get a good distribution function of cell capacity
  7. Its not much more than the others at R8 - R10 per A/h. No one else brings in the large > 250AH cells
  8. Has anyone bought cells from Altergrid? Looking for supply of large lithiums prismatics
  9. I have a similar question with regards a change over switch . I have a grid tie PV inverter normally running on the grid however when grid fails I want to change it to run on my Victron output in "AC coupled " mode. Now the grid connected stuff is on DB board 1 and the Victron powered stuff on another DB board 2. I therefore have to provide a feed from DB2 to DB1 to a change over switch which will be mounted in DB1 . Do I have to provide an isolator in DB1 ( at the point of entry for the alternate supply before the change over switch ? Similarly do I have to provide an isolator in DB2 at the interface to the feed from the grid tie inverter in DB1 ? Is a 2 pole MCB ( 1P+N ) considered an isolator?
  10. Are there any air conditioners available here which can manage their power usage according to the amount of Solar PV available ? ie read existing Energy meter ( SMA ) and adjust output accordingly to maximise solar PV usage?
  11. Looks at the VRM data the freedom won system is still horribly unbalanced. Apparently installer and Freedom have been looking at the system remotely but I cannot get any sense from the owners of the system what they are saying / doing. For me I would not buy Freedom Won - their charging algorithms are very aggressive and don't seem to pull back when cells go out of balance . rather go with SolarMD. Full cell visibility is also available with SolarMD via their communicator device and their portal
  12. So I guess some cells failed on the freedom Won and you got the rest?
  13. How did you acquire the Sinopoly cells ?
  14. With the Victron the data is available on their portal. Does Sunsynk not have a portal also?
  15. It is LifePO4. I have informed the owners and they are in touch with the installer and freedom won I have been told
  16. I see today max cell voltage on their system went to 3.96V and BMS did not trip !
  17. I'm monitoring ( on line via the Victron VRM portal ) a friends Freedom Won / Quattro / Victron MPPT installation and am noticing how the Freedom Wons cells are getting more and more unbalanced. At 100% full charge the max cell voltage is 3.77V with a cell max- min difference of 0.41V - Average was 3.40V . At the bottom end at 10% SOC ( only ever been below 40% once in the last 2 years due to loadshedding ) min cell voltage was 2.56V and cell max-min was 0.66V - avg was 3.16V. Is there a utility to manually initialise a cell balance routine ? How are you supposed to rebalance the Freedom Won if the internal balancer is loosing control?
  18. Would like to see how their BMS works - anyone have one they can share on VRM world?
  19. Thanks - price has come down significantly in the last 6 months
  20. recommended abs voltage of 54.6 seems to indicate it could be a 15cell design ? Coudl also be 16 .
  21. I dont have MPPT , but have grid tie with legal grid feed-in so much easier to detect available power to dump . At the moment just want to control the geyser effective load manually
  22. Its Probably back to back thyristor ( I doubt output has a significant DC component ) but accept the point that its a difficult load to manage for an inverter
  23. Has anyone used a thyristor load controller such as this one to reduce the effect load of the geyser to match ones PV available output?
  24. BActerial issue is way overstated - I set my thermostat to comfortable showeer temp - 43-44 deg. Showerdirect , no added cold wate r. Have done so for 20 year sand never had any bacteria infection
  25. When requesting 2 or more days worth of data one gets emailed a download link to select the datafile , however this no longer works - this started a few days ago and is still the case . I get the popup window that a request is being processed and that I should receive a download link , however I never receive a download link. Checked SPAM folder. I have not changed and setting on the portal. I still get alarms from the portal so my registered email is working . Anyone else have this problem ? How do I report this to Victron as its not an issue witha product I have purchased from a local dealer
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