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Shadders

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Shadders last won the day on November 29 2020

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  1. This is a firmware bug in the Axperts kings which seems to happen when the battery is full. Resetting the solar (leave it off until the icon disappears also works to reset) Version 71.94 has helped us with one of our installs, it seems to behave better. Other recommendations given in another post by Coulomb are to change the solar panel strings to a 2S6P (2 panels in series connected in parallel 6 times). Check this thread for more information:
  2. No, you have the same amount of energy in both systems. If you have a constant load of 10W at 6V you will be drawing 10/6 = 1.67A but at 12V you will be drawing 10/12=0.83A and if you do the mathematics you will get 12hours on both systems. Higher voltages are used to reduce losses by decreasing the current. If you go through your formulae to calculate power you get P=I^2*R and the resistance would be a constant dependent on your cable so the power lost as heat in a cable is heavy affected by the current flowing in it. If you reduce your current by a factor of 2 you reduce the power lost as
  3. Clarification to the above: a fully charged battery would be around 12.6-13.2V under no charging or load. You normally would charge them at a voltage of 14.2V to 14.6V during cyclic use depending on what the battery manufacturer recommends.
  4. For lead acid batteries those are decent operating voltages yes. I've tried to find the data sheet to see what the Varta recommended values are but could not find it. The Varta LFD60 has a life span of 200 cycles @ 50% discharge (if you do 1 cycle a day that's less than year) so it's not really designed for regular deep discharges. It will be a decent start though.
  5. Normally on these, at least on the cheap chinese Juta ones, it will automatically cut the power to the load terminals when the battery is low. On the Juta ones with an LCD screen you can program at what voltage this happens at.
  6. Version V201703A

    74 downloads

    Not as exhaustive as the manual for the MS 4-5KVA but covers testing and repair for the King.
  7. Most cheap PWM charge controllers have an LCD screen that can display voltage. Otherwise use a voltmeter or multimeter. The inverter pictured should be fine if you don't want to look for DC chargers. Your battery system voltage would need to be 12V. You can use two 6V batteries in series to give 12V but I would suggest you just get a 12V battery. In addition it is likely you could find car chargers for your laptop and phone that work on 12V if you don't want to use an inverter. You connect batteries in two ways, series and parallel. When connecting in series you add the vo
  8. The modbus standard specifies pins 5 (A) and 9 (B) https://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
  9. When connecting to inverters you use pin 1 (RS485B) and pin 2 (RS485A) on the pylontech side RJ45. What RS485 converter are you using to connect to your PC USB?
  10. I have seen port conflicts when trying to connect to a Revov battery and the inverter (using a serial to USB converter) at the same time on USB. The way I identified the correct port was to try and connect to inverter by itself and then to the battery. I restarted the pi so the ports were refreshed before doing this. Maybe something similar is happening here?
  11. To communicate with the software posted above you will need a RS485 port on your PC or a USB to RS485 converter like this https://www.robotics.org.za/W17286?search=rs485 or https://www.amazon.com/EZSync-RS485-USB-RS485-WE-compatible-EZSync010/dp/B010KJSCR8/ref=sr_1_3?dchild=1&keywords=usb+to+rs485+cable&qid=1601969179&sr=8-3 If you are wanting to plug your pylontech into your inverter that's a different story and I'd need details on what inverter you are using to advise what next to do.
  12. Right so I've been up and running for a couple of days and monitoring the Revov communications. ICC reads the battery temperature, SOC, cycles and current from the Revov BMS. The SOC is exported to the local emoncms so it is logged along with the other standard parameters. Currently no cell voltages are reported. I've not run it down to shut down yet so can't answer what is doing the disconnecting.
  13. Sadly I'm sitting waiting for my adapter cable to get sent to ZIm from SA, it should hopefully be here within the next 2 weeks and I will update.
  14. Yes ICC can do Revov now. ICC website tells you to contact Diversified Solutions for the correct cable and ICC settings.
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