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DocFrank

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  1. Dear more experinced members, take a look at the photographs and advise me please. Background information: In October 2020 I bought a ZTE-ZXD C48 FB 101 Li ion battery from the PowerForum Store. I have just replaced it with a bigger battery and the installer noticed that one side of the back was distorted. He was concerned that it might indicate some swollen cells inside. He said it should be urgently released and then removed enough screws to reveal what he believes to be swelling (due to deterioration) of the cells deep to the swollen back panel. When I explained who supplied it he said I should deal with the Power Forum store. I have attached a picture. Help needed: (I have yet to talk to the P. F. store - they have not answered their phone.) Can I safely use the battery as is until it fails? If so is there a fire hazard? If it should not be used as is can the defective cells be replaced with new ones? The battery has worked quite hard for ~4 years. However if new cells of the correct specification will work how tricky or easy is it to do this? Finally if the supplier accepts it under guarentee is it safe to be transported by Courier?
  2. Hi, Sorry I have only just seen this. Last October thru Powerforum store I got all my hardware. The same inverter and 16 410W PVs (split 8 facing NE & 8 NW) With these eating a big slice of my budget I went for the ZTE ZXDC48 FB101. I knew it was somewhat small for the rest of my installation. Despite some fears and significant criticism it has perform brilliantly. At first the Sunsynk alarmed and shut down claiming low battery voltage when I measured full voltage. However after 2 or 3 weeks the inverter learned to partner with the battery superbly. The ZTE (made by Pylontech BTW) cost me some cents under R23949. Feel free to ask more detaiils if you have not committed yet. Regards.
  3. I have worked through Gerhardt’s helpful post but I do need some extra specific help. Can anyone help me please. I am going for the same/similar Sunsynk 5.5kW super hybrid inverter and the ZTE ZXDC48 FB101 4.8kWh Li battery but planning to use the maximum strings of Canadian solar 410W super high power PERC with MC4 panels (ie 8 in each string) but my installer thinks 16 PV s are too much even though the 1 string will face north-east and the other north-west (90 degrees to each other). He warns that I could generate an over voltage in the system and fry my inverter. So this is my dilemma and I am hoping someone clever may be able to help me solve it. (I think this system will be optimum. The installation will be near Howick in KZN.) Thank you.
  4. I was blown away by the good pricing of the new battery (I compared it to the SecondLife 5.1 by Revov) and it compares very favourably with it out-specking it on every front except being 300W smaller. But I had never heard of LTE corp. My early research place it as a very large telekoms player which did not inspire me too much. However this url https://batteryindustry.tech/pylontech-launches-5gwh-lithium-ion-battery-project-in-china/ allayed most of my fears. I do believe this is the battery of choice for my new install. (I am probably telling the boffins nothing new but maybe some of the other Noobies will find value.) Has anyone bought an LTE yet? Your impressions please.
  5. I plan to start with a 3kW hybrid inverter with dual MPPT. The P V panels will be 310W each and I aim to put 8 on my roof arranged in 2 banks of 4. One bank faces northeast and the 2nd northwest (90 degrees angle between them). I am quite technically competent so in my opinion even on a cloudless clear sky day I cannot workout how 8 panels might put out an ‘over-wattage’ of their (possibility on paper) 3280W. Because the geometry of the 2 arrays cannot possible produce even 3000W. My guess (and it is only that because I cannot work out the maths I would need to calculate an exact figures) is that I will be lucky to get 2200W at any time from this PV combination. Now the main question that I cannot work out but need to know is how many more panels of the same strength can be safely added to each array to keep the output of the entire system of P V panels close to the 3000W my inverter can cope with? Using my “guestimate” of 2200W I calculate I should be able to add 2 to each array. But will this have a good safety margin for vast possible sets of eventualities my system could face? (It’s needless to try to factor in one academic eventuality that I can think of into this consideration. This of is a high level atomic bomb detonation! The more erudite will surely be able to consider more mundane but very much more important possibilities into this conundrum.) So in summary. Plan. PVs of 310W x 4 facing NE + PVs of 310W x 4 facing NW in theory = 3280W but probably in practice very unlikely to = more than 2200W. So will PVs of 310W x 6 facing NE + PVs of 310W x 6 get to around 2850W (5% less than 3000W for safety I'm guessing again or can one safely push it closer to 3000W?) Thank you.
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