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  1. shadowsteve

    Off-grid Solar / Battery monitoring and control freeware

    There's no working connection to the Renogy. None of the debug statements indicate any comms success as far as I see it.
  2. shadowsteve

    Off-grid Solar / Battery monitoring and control freeware

    I'm on the road until April and the cable is at home. It was similar to what BarkingSpider did though. Make sure you get a USB cable that has a genuine chip in it for the data conversion as some of the knockoffs don't work
  3. shadowsteve

    Future of DIY LiFePO4 looks bleak…

    I didn't read all the prior pages as I'm boondocking on a cell connection so maybe this was asked/answered.... Does everyone use the 3.2v cell voltage to calc Ah? My 2x 280Ah would then be 7168Wh? That would make the raw component (cells&bms) cost 1125/7168=15.7c and probably another 1-2c in...
  4. shadowsteve

    Off-grid Solar / Battery monitoring and control freeware

    On my Rover I'm using a RJ-USB cable that came with it. On the Tracer I used prior I ground down an ethernet cable connector to fit into the 6 pin socket and modified an RS-USB cable to work.
  5. shadowsteve

    3 BMS - 1 missing bluetooth module, can I use it until the part arrives?

    I'm using ESP32 boards on each BMS sending data to MQTT/Influx/Grafana on a Pi4 and display is via web page or the Pi3/TouchScreen For changing settings I swap to the BT interface and Android app
  6. shadowsteve

    3 BMS - 1 missing bluetooth module, can I use it until the part arrives?

    You can move the BT module between BMS units to check status or change settings with no problem. Just disconnect the app from it and unplug it then plug it into another BMS. I've switched to using a centralized monitoring system as the BT requires switching between interfaces to check each...
  7. shadowsteve

    Off-grid Solar / Battery monitoring and control freeware

    My install is in an RV. The Pi4 runs off a 12-5v converter. Using a desktop/laptop in my application is a waste of space & power. I also have Plex on the Pi4 so it's my media server as well. The choice of what hardware to use is specific to each person. The cost of the Pi is a tiny expense in...
  8. shadowsteve

    Gas-Powered Lawn Equipment Will Soon Be Banned In Cali, a broad category that includes generators.

    I switched out my aging Honda for a Greenworks 80v mower I got from Costco here in Canada. I have a 1/2 acre property so probably cutting about 1/4 acre and I can do it on one charge. The mulching isn't the best if the grass is damp at all. In that case I need to wipe accumulated clippings about...
  9. shadowsteve

    I can't even express the right words....

    I worked with PDP 11/70's in the 80's. The RM05 drive was 256mb and held a platter stack that went into a top loading "washing machine". If I was running a data intensive app the cabinet would shake like it a washer on spin cycle :)
  10. shadowsteve

    I can't even express the right words....

    My first remote connection method was 110baud acoustic coupler. I brought a Decwriter home from work so I could dial in to fix system problems rather than make the 2 hr round trip on weekends or nights. I stilled charged 4hrs work time though :)
  11. shadowsteve

    JBD BMS Wi-Fi Module

    I couldn't get a Wemos D1 R1 to talk to the BMS modules. I'm using ESP32's now and they are working fine. I have them reading the data and publishing to the MQTT on a Pi4
  12. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    You can get two Renogy 60A DC-DC @ 260$ each and parallel them. Are you wanting the max charge amps to reduce the engine run time? I didn't go back thru the thread but I recall you had some high current loads you needed to make up for with the charging. Alternative would be a portable generator...
  13. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    There's a BMS parameter for max charging rate. You are likely exceeding that even with the 250A BMS. What voltage is the alternator putting out when it's running? You need to make sure you aren't too high for the Li batteries.
  14. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    No, not good to let the BMS act as the disconnect. You need to have equipment between the alternator and the BMS to control the charge current. Like this: https://www.renogy.com/12v-60a-dc-to-dc-battery-charger/ BTW, I just disconnected the shore power from my trailer and the 12v draw dropped...
  15. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    How many charge amps does the BMS show when it shuts down? I charged my batteries this afternoon from the onboard Progressive Dynamics unit which is capable of 90A. The batteries were @ 80% and after a minute or two @ 60A they dropped to taking ~42A total (21A each). You could use a DC to DC...
  16. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    Yes, that's essentially a current picture but no, the negative lead (black)in the balance wire connector is not required to be connected to the batteries. That connection is already made by the B- on the BMS. Some drawings show it connected, some don't. I chose to not connect it and the pack is...
  17. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    Any time I'm disconnecting the BMS from the battery I pull the balance connector first. I also connect it last when putting it together. I built my batteries as standalone packs. They connect to bus bars before connecting to loads. The connection to the inverter should have a suitable fuse inline
  18. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    I'm not using the black balance wire in my setup. I assume you mean to not use the B+ as a junction point. If at some point you use the onboard heater controls you'll want a power feed back to the B+
  19. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    There's a pic of my batteries on this thread https://diysolarforum.com/threads/battery-build-rept-280ah-jbd-bms.28459/#post-356054 I used binding posts as my connection point for the pos & neg connections to the RV. My trailer has solar panels charging it up during the day (most days, I'm in...
  20. shadowsteve

    DIY 280Amp LifePo4 With BMS voltage problem.

    Are you seeing the 0.5A as reported by the BMS? I have the same BMS (2x 150A version) on two 280Ah battery packs. My BMS reports about 1.5-1.8A draw overnight (no solar to cover it) but I have two BMS plus the RV DC loads including a wifi router and inverter (connected but not turned on in...
  21. shadowsteve

    Heating Pad Controller

    Some of the JBD BMS versions have heater control. I have a couple of the long style with the copper bus bars along the sides and they support two heaters with thermocouples. I also have the shorter style with full aluminum heatsink and they have no heater control.
  22. shadowsteve

    Renogy Rover 40A not disconnecting at high voltage.

    I have my Rover 40 on Li mode and then I adjusted the target charge voltage to 13.75 using the app over the BT connection
  23. shadowsteve

    Should I change my inverter precharge circuit?

    Which, as far as I know, keeps the caps charged so the inrush is only when physically connecting the 12v input. I don't disconnect the 12v in our RV unless we won't be using it for an extended period
  24. shadowsteve

    My two new panels seem to retain rainwater

    Likely that the new panels have a bit of an oily film on them from manufacturing. It looks like the older panels have water on them as well but without the film the water doesn't bead up. If you squeegeed on of each you probably find a similar amount of water on them. If you want them to look...
  25. shadowsteve

    Amps Divided when pulled through parallel battery strings

    For two equivalent batteries with same wire gauges and pretty much the same connection cable lengths then yes you'll get 1/2 the current coming from each battery. If you measured accurately enough you'd see a difference due to slight diff in connection resistance, lug connections etc. but we're...
  26. shadowsteve

    Wire gauge for JBD 150a bms

    I configured my pack cells as 2x2 (4s 150A) and used #2 for the cell interconnects as pos lead to the binding post. The neg leads are 2x #4 from the cells to BMS and then to the binding post. I have two spots where the #2 is a pretty tight bend (off the pos end and middle cell connection) but...
  27. shadowsteve

    Renogy Rover 40A not disconnecting at high voltage.

    My Renogy is off on it's voltage readings as well
  28. shadowsteve

    Renogy Rover 40A not disconnecting at high voltage.

    If you cells get out of balance a bit as they charge you could get an overvoltage trip on a single cell. I run a 40A on a 12v system and I adjusted the boost voltage downwards as the BMS (JBD) was hitting cell overvoltage. I charge to 13.8v now. I assume for your 24v you just double all the...
  29. shadowsteve

    Inverter to RV’s 30amp power cord

    Simple question... simple answer. Yes. You can use the 30A-15A converter block and plug the shore power cord into the outlet on the face of the inverter and all of your AC circuits will be live the same as if plugged into a pedestal. No grounding issues as it's in the cord. Turn off the...
  30. shadowsteve

    JBD BMS Wi-Fi Module

    I'm not using the kiosk mode right now. When I start up the Pi display I get the regular Grafana desktop menu and then pick Playlist and can run in either of 3 modes. The TV mode lets me have the menu for changing the time period or stepping through the playlist while only losing the space of...
  31. shadowsteve

    JBD BMS Wi-Fi Module

    Thanks. I already had a Pi3B and 7" touchscreen sitting around from when I had written a Windows IoT app to monitor my old system that broadcast UDP packets. I need to go through all the steps I used to build the s/w packages as I tried 3 or 4 ways until I finally got one to work and there was...
  32. shadowsteve

    JBD BMS Wi-Fi Module

    Got a Pi running so I can show the playlist. This is TV mode that leaves the menu bar across the top. I'll make up more dashboards to show battery details
  33. shadowsteve

    JBD BMS Wi-Fi Module

    I found that using a playlist will fill the black void on the right of the screen. However you also need to redesign the dashboard to work with the playlist mode. You can have multiple dashboards in a playlist and cycle them on a timed basis or just the one and no rotation
  34. shadowsteve

    JBD BMS Wi-Fi Module

    I printed a baseplate for the ssd, Pi and power unit so I could keep it modular
  35. shadowsteve

    JBD BMS Wi-Fi Module

    That's a big system! My setup is 2x 4s 280Ah packs with a 3000w PSW inverter and 640w of panels on the roof of the fifth wheel trailer. I moved the Pi OS and apps to an SSD and removed the SD card. I had loaded it all up on a high endurance SD but in the end I figured easier to use an SSD. I've...
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