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Lindsay

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Lindsay last won the day on June 9 2020

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  1. I was hoping there was an alternative to ordering from Joburg, but ordering from someone local via FB marketplace might also have some risks I'm using 24V Mecer (Axpert), would it work for that?
  2. Well I'd like to build my own battery bank, so I'm looking for individual LiFePO4 cells and a (possibly DALY brand) bms. I'm hoping I can build something a bit cheaper than a Pylontech module and will also have a bit more flexibility with sizing it correctly
  3. Hi, Are there any places in Cape Town that sell new LiFePO4 batteries at a reasonable price Thanks!
  4. It worked 100% after I rebooted, stays off after I switch it off.
  5. Hi Coulomb, That seemed to work, I replaced QPIGS for PEj or PDj in my script and didn't bother reading any feedback. However my initial script accidentally had an infinite loop, which caused it to send the command to switch on (power saving off) the inverter over and over. I stopped the script, fixed it, ran a script to turn off the inverter (power saving on) and it seemed to work, however a few minutes later the inverter had turned on again. I then ran "sudo pkill -f <script name>" and also ran my script to turn off the inverter yet again but it still seemed to turn itself on
  6. Hi, I posted this a while back but got no response, I'm hoping someone here can help me. I'm wanting to be able to switch on the inverter using the settings menu remotely. I use the QPIGS command from Python to monitor my Mecer (Axpert) 3kVA 24V inverter from a Raspberry Pi. Currently I leave it in SENS mode in the settings so that it only fully turns on the inverter when a load is detected. If the load is over about 100W then this works fine and it turns on, however anything less than this and it won't turn on. If I want to turn it on for a lighter load I can change the setti
  7. So I disconnected each battery one by one last weekend and did a quick 15minute 30W load test after a full day of sun. Found that 2 of my lead acid batteries went down below 11V after only 5 minutes Two others went just below 12V after 15 minutes (not great) and the other 4 were all 12.2-12.4V. So I've removed the worst two and now the battery array is back to getting almost fully charged every day Looks like I might no longer need to charge off mains for a bit every evening like I have been for the past few months and hopefully I won't have to upgrade to Lithium's quite yet, alth
  8. Looks like powerforum shop sells it, but seems to be 48V so not suitable for me.
  9. Thanks. Sounds like around 3.2kWh would be ideal, but maybe I could just get away with 2.8kWh Worst case I could always switch to charge off the grid on particularly bad solar days.
  10. Sorry to revive my old thread, but assuming I was moving to Lithium batteries, what capacity should I buy? I only use around 2kWh (80Ah @ 24V) per 24hr cycle, and probably drain 30Ah overnight (unless we in middle of winter where it could be up to 40Ah) at which point they start charging again in the morning. I still have a lot of items on normal mains electricity, and am not planning on moving everything over to solar. Would 2.8kWh be enough that the DOD wouldn't be too much and the batteries would be ok for several years? I'm hoping to avoid buying two of these battery packs (
  11. Ok, so if I implemented Pylontech or the ones Bain sells then I gather I'll just have to make sure it doesn't ever go past the maximum voltage amount to avoid it shutting off. I've heard that disconnecting the batteries from Axpert type inverters while there's solar coming in can cause them to blow. It doesn't sound like there's any essential communication needed that requires the BMS to talk to the inverter. I would however like at least to log the data from the BMS so I can monitor the SOC on my Raspberry PI and check they aren't undercharged (I already log from my inverter and using sh
  12. @Bain ViljoenThat 6kwh 24V unit looks good. What are the interface options on it, can it talk to the Axpert inverters or does the BMS have USB/serial comms? You guys aren't based in Cape Town as far as I'm aware, so what would it cost to ship it down and what are the support options down here if there are any issues or problems installing it? Thanks!
  13. I already have some things in my house which run directly off the 24V dc (originally I didn't even have an inverter!) and my needs for AC power aren't much more than 1000W (induction cooker and slow cooker), so my 3kVA Mecer is fine for now. I'd only consider 48v if I was going to move completely to solar, at the moment I'm 60% on solar. It's a reasonable price, do you know if you can run two of these in parallel? Ideally I'd like to have 4kWh or more, although I'm not sure I could afford 2 of them. Could they custom build to a clients requirements if you want something just a bit bigg
  14. I should probably just have gone for Lithium from the beginning, once lead-acid ones start to go bad they really seem to go downhill fast. I only got about 3 years from my lead-acid batteries even though they should have only discharged on average 10-15% overnight. I guess this won't matter now anyway then since I'm def not going lead-acid anymore. This is very cool data. Is there any spec available for the communications protocol?
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