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GreenMan

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  1. Yes Pylontechs are LiFePo4 pouch cells. Main thing with building your own is to check the battery sense leads are correct. Then check again and then a 3rd time to make sure you have got the wiring correct. If not the BMS will very likely go poof and is a goner.
  2. Agree with Luminous that, the Pylons would work just fine too. Of interest is the US2500, from what I can work out, is a 8S pack configuration. Spec sheet says nominal voltage of US2500 is 25.6V. Nominal voltage of a LiFePo4 cell is 3.2V so 3.2 x 8 - 25.6V. The 8S is what we would expect. So it is a pity that they did not stick to the more conventional 16S for the US3000 as they are 15S pack configuration. Linday if you are good with your hands, you could build up a 8S pack from a kit from LBSA and this would be cheaper than buying ready built one or buying a Pylontech.
  3. No problem, the 2 together works fine. Inverter we installed is a 3KVA/2.4KW. We used 35sqmm cable as 25sqmm would have been on limit as max current draw would be approx 96A. With the 35sqmm we avoid a large voltage drop across the cables. With a moderately sized inverter like a 3KVA and a that 200AH battery capacity you can expect to survive a long period of loss of mains supply ! Make sure you set the bulk charge; float and low voltage on the inverter as per recommendations. I set the low voltage a little higher to prevent any chance of the BMS disconnecting and thus having to reset it
  4. If you have the 25sq cable already just double up each connection which gives you 50sq which is lower resistance than than 35sq and much easier to work with. Saves you having to buy new 35sq cable...
  5. I got this BMS and it has a CAN/RS485 port... LBSA DALY 100a 15S/16S 48V LiFePO4 Smart BMS with Optional Display or Bluetooth | Lithium Batteries South Africa (lithiumbatteriessa.co.za) This is pinout of the CAN/RS485 connector - DL-R16A-F16S100ATJ-MM00_Product_Specification_Confirmation_1.pdf (shopify.com)
  6. Thanks Sc00bs ! In short term will have to travel to change the settings...
  7. I have searched high and low in the Solarman Smart app and also in the web browser access but cannot find a way to access the settings that can be changed on the inverter's touch screen. I need to enable Priority Load and other settings without driving to where the inverter is installed. Can these inverter settings be changed remotely ? The Sunsynk is a better inverter than the Axpert (but remember the Sunsynk is more expensive) but with the Axpert plus ICC on Pi I can remotely change any setting that I want....
  8. Thanks KM. That is a little disappointing- the Goodwes are much closer to real time. I was suspecting that it was the poor wifi signal ! After you mentioned that if the internet is down then that period is missing, I checked and the "Real Time" data is all there. So I think the internet connection is satisfactory
  9. What is the normal update speed of your Real Time data in the Solarman app ? We see the inverter information but the data is between 4 and 8 minutes delayed. Is this normal ? Is it slow perhaps due to not-optimum wifi access ? We are using the Solarman app on iPhone.
  10. Noted Coulomb, which leads me to the next thought that a soft-starter then may assist in lowering the starting surge current ?
  11. Agree with Coulomb's comment regarding starting current. I have noted startup for our fridge peak at times to 3 KW ! I know it is that appliance as I hear it start up ! Of interest but perhaps for a separate topic - what causes the high initial surge ? I have read that the cause for the high startup current albeit for a very short time is the compressor motor starter capacitor. I suppose it could also be attributable to the initial friction or inertia of the compressor's pump components ? If it IS the capacitor then I guess a soft starter would not be of much use to reduce the current a
  12. What is the power of the panels and in what configuration are they wired ?
  13. Thanks for answering my earlier question Aspergo. If you look closely at the first photo from QBannister, you will see that there are 16x Mosfets close to the connectors which are connected to the cells for individual cell monitoring. Next to the Mosfets are 16x (pic is a little blurry) SMD resistors for what I assume are the balancing resistors. Now because there are 17x FETS and 17x balancing resistors leads me to the conclusion that the BMS is also used in a battery with 16S configuration. The same applies to Shoto. The earlier models of Shoto I believe were 16S but the late
  14. Yes a low frequency inverter will power fridges and freezers but a King will work no problem too.
  15. Prepaid customers will probably not enjoy that new R200 "capacity charge" Sadly I think objections will stop the proposed charge. "Residential pre-paid customers will be charged R200/month capacity charge" Another way of milking the base of paying clients.
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