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About Bl4d3

  • Birthday March 11

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    Cape Town, South Africa

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  1. Received the replacement battery yesterday, fully charged the old batteries and the new battery separately. Let them sit connected to each other for a while to balance out and put it back into service. Seems to have resolved the problem. They are discharging evenly and even when 1 goes slightly our of balance, the BMS kicks in and draws more from the other packs so that they can become balanced again. System is working perfectly so far. Batteries all most carried us the whole night as well
  2. It appears to be different
  3. Got feedback from TheSunPays, they're going to swap the battery out due to the firmware mismatching. I must say though, the service I've received from them has been superb.
  4. All wiring is the same length and same thickness. One thing I did find now is that the new battery has a different firmware version than the older 2. That might be the issue, I have sent the details onto the manufacturer
  5. Hey 87 We fully charged the batteries and kept them fully charged, connected to each other for 2 days. Sadly it did not solve the problem. From 100 - 75% the batteries discharge evenly, but as soon as it goes below 75%, the new takes over 50% of the current draw while each of the other 2 take 25% each. TheSunPays is monitoring the batteries remotely though and are talking with their factory as well.
  6. You'd have to check what thickness the wires are from the AC Output from the inverter (possibly AC input as well if running Hybrid) to determine what circuit breaker you can use. A circuit breaker is installed to protect the wires, nothing else. At full tilt, each inverter would be pushing out 22.7A (5000w / 220v = 22.7). At your current setup, each inverter is theoretically limited to 4400w (220v x 20A = 4400w) Once you have confirmed the wires are thick enough and what current they can carry safely, then you can install a circuit breaker with a lower rating than the wires (to protect the wires). I strongly recommend getting a qualified electrician to do this. If not done properly, you could potentially burn your house down or kill yourself.
  7. A universal laptop charger should work, you can get them from most electronic stores for R200. Get the adjustable ones where you can set the output voltage. 16v 2A is fairly common
  8. So I'm charging the batteries up now with a bulk charge voltage of 53.2v and a float of 52v and will let them sit for 2 days for the absorption to full run. I previously did this over the weekend and let them sit over the weekend to try balance out and straight after that there was that uneven drain. I noticed on another post that someone had a similar issue but with Pylontechs : I would have thought that after all most 2 months it would have evened out though.
  9. Thanks for the recommendation, will most definitely watch this evening. I have 2 x TheSunPays 4kw Axpert MKS II Clones.
  10. Hey all So I have 3 x TheSunPays 4.8kw LiFePO4 batteries. 2 of them were purchased in February 2020, the 3rd was purchased about 2 months ago. I am having a problem of uneven discharge, the new battery discharges faster and ends on 17% SOC while the other 2 will end at 40% SOC. The voltages across all 3 are the same (including cells). I contacted TheSunPays and they say the new battery will discharge faster due to the lower internal resistance because its newer, which makes perfect sense. Is there anyway around this to get the batteries to discharge at a similar rate as we are loosing about 22A of capacity due to this and the new battery would in turn degrade faster. All 3 batteries BMS are connected together and the positive from the inverter is connected to the top battery with the negative at the bottom battery.
  11. We are running a solar geyser with a gas geyser. To be honest, it will take you near a lifetime to pay off the solar geyser just from the savings of using a little less gas. I've also found that Solar geysers aren't particularly great, ours normally heats to roughly 30 degrees, in Summer thats closer to 40 degrees.
  12. If you dont mind me asking, what is your reason for wanting to move away from TheSunPays inverter? I've got 2 of their 4kw units and they're running quite nicely. They've also recently released proper monitoring software with SoC control, all you need is a Pi, battery cable (for Lithium batteries) and internet. Software is free as well.
  13. So it seems we have come to the conclusion of what happened. 2 x 15A fuses were dead on arrival. We replaced the 2 fuses last night and we got the following output : 9 x Canadian Solar 360w Poly - 3.00kw 4 x JA Solar 535w Mono - 1.5kw This was in cloudy conditions when there was a bit of a break in the clouds.
  14. Thanks We will give the 20A fuses a try. Ideally we would have done a similar mounting layout but due to space constraints, we could not. Would adding a diode in line work sufficiently to prevent back feeding?
  15. Hi all Hope someone can help me. We've got the following installed : 2 x TheSunPays Axpert 4kw/5ka Clone units (Axpert MKS clone, low voltage) 3 x TheSunPays 48v 100Ah LiFePO4 batteries 9 x Canadian Solar 360w poly panels (3S3P) 4 x JA Solar 535w Mono panels (2S2P) The problem is with the JA Solar 535w panels that is connected to the Slave inverter. 2 panels are flat mounted on IBR, 2 panels are mounted on tiled roof at a 25ish degree tilt north facing. The panels are brand new and we commissioned them over the weekend, today was the first test run. Voltage readout at the DC Isolator is 90v At peak sun today we only got 500w out of the 4 JA panels while the 9 Canadian Solar panels hit 2.7kw. The panels were not in shade. Charge limit on the slave inverter is set at 60A, batteries were at 35% and load was roughly at 1kw throughout the day. Each series circuit has its own positive and negative running to them, each lead is then fused with 15A fuses (2 x fuses for each series circuit, 1 on positive, 1 on negative). I went to check now, and 2 fuses were blown (no continuity, no resistance, nada). We have 2 theories. 1. The fuses were DoA 2. The panels amperage went too high and caused the fuses to blow. The Data sheet however says the panels Short Circuit current is 13.79A and Maximum Power Current is 12.90. Hence why we used 15A fuses. I would like to hear what forum members think what happened so as to guide is roughly in the correct direction. This was a DIY install.
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