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  1. joshwalee

    4Runner Solar Bank

    Just thought I would share my solar bank built for my 4Runner. I love this thing and it keeps me going totally off grid wherever I want to go. Pelican 1560 case 100ah SOK BT LifePo4 w/molded ABS bracket Victron BMV-712 w/BT Victron MPPT 100/30 Victron WaLoRan Server WaLoRan Wi-Fi...
  2. joshwalee

    Should I spend more for SOK bluetooth batteries?

    FYI to anyone considering the Bluetooth model. It has been confirmed by SOK that the BLE BMS has a over current discharge protection of 120A with peak of 200A compared to the 200A cutoff and 330A peak of the non-BLE BMS. This can play a significant factor based on your power needs and should...
  3. joshwalee

    New SOK Bluetooth BMS for DIY

    I just went through a discharge cycle from 13.8V-10.6V (my BMS voltage cut-off). My BMV shows 110Ah while monitoring draw with an external amp clamp as well. I'm satisfied with capacity. It appears the protection state function is still a WIP since it does not highlight any items even though my...
  4. joshwalee

    New SOK Bluetooth BMS for DIY

    Yes, 120A is a far stretch from the published 200A for 3s and cut-off of 330A. The product sheet should certainly be updated to provide correct expectations. With my current setup it is usable, but falls well below what I had planned for. Maybe room for continued improvement... I will still...
  5. joshwalee

    New SOK Bluetooth BMS for DIY

    Update 2: SOK was prompt to respond and there has been an update pushed out to the Play Store for the BMS app. Functionality has been restored and there is also protection mode visibility included now (see attached). Big thanks to the developer for the contact and resolution! According to my...
  6. joshwalee

    New SOK Bluetooth BMS for DIY

    I agree. My email to them focused on their exceptional build quality. It seems the new BMS may be a missed opportunity, but hopefully their support can match their build quality. I'm not shopping BMS yet.
  7. joshwalee

    New SOK Bluetooth BMS for DIY

    Update: No further responses from developer contact. No updates to app in the Play Store. I've scoured the night for any open source coding without luck, and have been unable to find a previous app version published anywhere. I have also tried every BMS app available on the Play Store and...
  8. joshwalee

    New SOK Bluetooth BMS for DIY

    I did receive a response from the developer contact. The video linked in my post above was shared and I was assured an engineer will address the issue. I will report back once I'm able to confirm operation. FWIW, I am on a Pixel 6 running the latest Android 12.
  9. joshwalee

    New SOK Bluetooth BMS for DIY

    Found the app. Unfortunately it can see the SOK BMS, but cannot connect.
  10. joshwalee

    New SOK Bluetooth BMS for DIY

    I show 4/25/22 for that (the current) app version. We shall see if I get a response or if an update is pushed to the Play Store.
  11. joshwalee

    New SOK Bluetooth BMS for DIY

    FYI for anyone running these batteries. The Android BMS app updated yesterday and will no longer connect. I've cleared app data and reinstalled with no solution. I've reached out to the app developer and hope to see a fix soon.
  12. joshwalee

    New SOK Bluetooth BMS for DIY

    Odd since the spec sheet shows 330A BMS cutoff. I agree, it is actually quite lower since I could not run a 1000W inverter due to peak current on connect.
  13. joshwalee

    New SOK Bluetooth BMS for DIY

    Just a follow up... Since the inverter change the BMS is performing beautifully. Bench testing capacity and land at 112Ah while pushing a 90A discharge to low voltage cutoff. The only minor complaint I would have is the very limited range of the BMS BT. It's a small gripe since I really only use...
  14. joshwalee

    New SOK Bluetooth BMS for DIY

    Thank you for the response. I understand it is not a guarantee. Following basic math for a safer unit peak I decided to try an inverter that (should) not exceed BMS current limits. Mark 2 includes a 600W inverter that fits better overall and has been confirmed not to trip the discharge FET...
  15. joshwalee

    New SOK Bluetooth BMS for DIY

    I agree that this seems to be an inverter and/or BMS design gap. The remote switch behavior is also surprising to me. I did not have a particular use case for the 1000W inverter and was simply trying to build the system to capacities. It appears I may have overreached unless I were to add a...
  16. joshwalee

    New SOK Bluetooth BMS for DIY

    Thanks again for the response. I've actually already come to the same conclusion and isolated it down to the 1000W Renogy inverter. It has been confirmed as the trigger point for the discharge FET when it is switched on direct, remote, or connected directly with main cables. I have removed the...
  17. joshwalee

    New SOK Bluetooth BMS for DIY

    Additional schematic added (shunt shows battery monitor, but I have a 2 wire temp sensor connected). I ran my fridge on ECO at 50 degrees past night and the BMS did not disconnect the battery. I'll be disconnecting at 100% SOC to test function with BMV backlight off vs always on at minimum...
  18. joshwalee

    New SOK Bluetooth BMS for DIY

    Internal voltage at 13.1V last time it happened with D MOS off (FET). SOK BMS: Design Capacity: 100Ah Full Capacity: 100Ah BAT over charge: 14.8V BAT over charge release: 14.4V COV: 3.7V COVC: 3.65V OCT: 60C OCTC: 50C CTC: 0C CTCC: 5C BAT over discharge: 11V BAT over discharge release: 11.2V...
  19. joshwalee

    New SOK Bluetooth BMS for DIY

    Thanks for the response! BMS app reads 0.000V even though cell voltage is adequate (example: 3.275V per cell). My MPPT and BMV are not available through the Victron app since they are not powered on. I can upload my BMS/MPPT/BMV values and a schematic in a bit if that helps. (working now)
  20. joshwalee

    New SOK Bluetooth BMS for DIY

    I've made some final adjustments and performed stress tests. Everything is good except the SOK battery goes to sleep after a while when no charge or load is detected. I have to reconnect the BMS with a 12V input when this happens. I'm experimenting with a small parasitic load to keep the unit...
  21. joshwalee

    New SOK Bluetooth BMS for DIY

    I just picked up one of the 100ah and built it into a power bank with a Victron 100|30 MPPT, Victron BMV-712, and Renogy 1000w inverter. Today is day one and I'll see how it holds up overall. This is replacing a Bluetti EB55 that is being RMA'd under warranty for a PV input failure. I used...
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