fanchazstic
New Member
- Joined
- Jun 19, 2022
- Messages
- 25
Final update (hopefully...): If you're having trouble with communication using the Pylontech485 protocol and your unit has firmware 112.14 you will need to update it to 112.19. The firmware is available from Watts247 and can be flashed following this video from LithiumSolar. It is very important to follow his instructions with adding a resistor to pin 2 of the serial cable or you will likely encounter flash failures. You may be able to get around those issues by cooling the LCD panel PCB during the flashing process, but some people have better luck with that than others. It's safer and easier to just put the resistor in.
Latest update: There are many reports in this thread of users who have updated to 112.19 and have fixed their communication. There seems to be official firmware out on the Watts247 page and another user has reported being sent it directly from MPP Solar. Most people still seem to have thermal issues when applying the update though. Everyone who has reported trouble with updating the firmware (except maybe one user who may have had an issue with their RS232 adapter) has been able to resolve it by cooling down the remote panel unit. Whether that's letting the unit sit powered off for a while, putting it in the freezer while applying the update, or using an air compressor to give it lots of airflow. Time users seem to require more cooling than others and some don't have any problem at all. Don't be afraid to try extremes. In any case as long as you flash the official firmware provided by MPP Solar they should have you covered if you have issues. My experience with MPP support was not great and they refused to help but I assume that comes from me having flashed an "unofficial" firmware. Pages 4 and 5 contain multiple reports from other users who have tried this, had trouble, and gotten it working. It would be a good idea to read through at least those two pages before attempting the upgrade.
UPDATE: I was able to get communication working on my unit by flashing remote panel firmware version 112.19 provided by @savaga in this post BUT I DO NOT RECOMMEND FLASHING IT at this time. Read this post for more information and warning
It also might be a good idea to avoid purchasing this unit from Watts247. When I called them about the communications issue, they tried to sell me batteries from their site and I guess wanted me to just toss out $4k worth of SOK batteries, as if that's a solution. When I emailed them about the panel firmware flash that failed, I was told "I can assure you that the firmware was not the problem to begin with" but oddly enough, firmware 112.19 fixed it once I finally got it flashed. And AGAIN they tried to sell me their own batteries. When something goes wrong they'll blame someone else and try to sell you something else instead of standing behind what they already sold you.
Original post:
I'm having trouble getting a LV6548 to communicate with two SOK SK48v100 server rack batteries. I've followed the manual on the Current Connected site for communication, but the inverter either doesn't establish communication at all and flashes the 61 warning after 3 minutes, or it does establish communication for a few seconds then flashes the 04 warning (low battery) for a couple seconds and then starts flashing the 61 warning (communication lost). When communication is established (for the couple of seconds) the LV6548 shows the battery to be three bars which is it. But then it flashes the low battery warning and loses communication (I assume the former is caused by the latter, because the BMS's say the batteries are in the mid 60%'s).
I have the DIP switches set on the master battery to (left to right) on-off-off-off (up-down-down-down) and the second battery off-on-off-off (down-up-down-down). There is a patch cable going from RS485B on the master battery to RS485C on the second battery. I have also tried having the patch cable go from RS485B on the master to RS485A on the second battery. I've even tried eliminating the second battery and only running a single battery.
My last idea was to update the firmware on the LV6548 (currently at ver 69.02) but I can't find the option anywhere in the watchpower app on my phone or the watchpower program on the computer. I can't find instructions in the manual either other than you do it with a USB stick and to contact the dealer.. And of course I can't find any firmware files on the MPP solar website, so I don't even know if there's a newer firmware available or not.
Sorry for the length but I wanted to provide as much information as I could. If nobody else has any ideas or experience with this I'll start contacting Current Connected and watts247. At the very least I think it's a good idea to document this here for others to possibly find in the future.
Edit: Also forgot to add that I definitely do have the communication cable the correct way around. I even made my own cable following the manual from Current Connected. Both cables have the same behavior.
Latest update: There are many reports in this thread of users who have updated to 112.19 and have fixed their communication. There seems to be official firmware out on the Watts247 page and another user has reported being sent it directly from MPP Solar. Most people still seem to have thermal issues when applying the update though. Everyone who has reported trouble with updating the firmware (except maybe one user who may have had an issue with their RS232 adapter) has been able to resolve it by cooling down the remote panel unit. Whether that's letting the unit sit powered off for a while, putting it in the freezer while applying the update, or using an air compressor to give it lots of airflow. Time users seem to require more cooling than others and some don't have any problem at all. Don't be afraid to try extremes. In any case as long as you flash the official firmware provided by MPP Solar they should have you covered if you have issues. My experience with MPP support was not great and they refused to help but I assume that comes from me having flashed an "unofficial" firmware. Pages 4 and 5 contain multiple reports from other users who have tried this, had trouble, and gotten it working. It would be a good idea to read through at least those two pages before attempting the upgrade.
UPDATE: I was able to get communication working on my unit by flashing remote panel firmware version 112.19 provided by @savaga in this post BUT I DO NOT RECOMMEND FLASHING IT at this time. Read this post for more information and warning
It also might be a good idea to avoid purchasing this unit from Watts247. When I called them about the communications issue, they tried to sell me batteries from their site and I guess wanted me to just toss out $4k worth of SOK batteries, as if that's a solution. When I emailed them about the panel firmware flash that failed, I was told "I can assure you that the firmware was not the problem to begin with" but oddly enough, firmware 112.19 fixed it once I finally got it flashed. And AGAIN they tried to sell me their own batteries. When something goes wrong they'll blame someone else and try to sell you something else instead of standing behind what they already sold you.
Original post:
I'm having trouble getting a LV6548 to communicate with two SOK SK48v100 server rack batteries. I've followed the manual on the Current Connected site for communication, but the inverter either doesn't establish communication at all and flashes the 61 warning after 3 minutes, or it does establish communication for a few seconds then flashes the 04 warning (low battery) for a couple seconds and then starts flashing the 61 warning (communication lost). When communication is established (for the couple of seconds) the LV6548 shows the battery to be three bars which is it. But then it flashes the low battery warning and loses communication (I assume the former is caused by the latter, because the BMS's say the batteries are in the mid 60%'s).
I have the DIP switches set on the master battery to (left to right) on-off-off-off (up-down-down-down) and the second battery off-on-off-off (down-up-down-down). There is a patch cable going from RS485B on the master battery to RS485C on the second battery. I have also tried having the patch cable go from RS485B on the master to RS485A on the second battery. I've even tried eliminating the second battery and only running a single battery.
My last idea was to update the firmware on the LV6548 (currently at ver 69.02) but I can't find the option anywhere in the watchpower app on my phone or the watchpower program on the computer. I can't find instructions in the manual either other than you do it with a USB stick and to contact the dealer.. And of course I can't find any firmware files on the MPP solar website, so I don't even know if there's a newer firmware available or not.
Sorry for the length but I wanted to provide as much information as I could. If nobody else has any ideas or experience with this I'll start contacting Current Connected and watts247. At the very least I think it's a good idea to document this here for others to possibly find in the future.
Edit: Also forgot to add that I definitely do have the communication cable the correct way around. I even made my own cable following the manual from Current Connected. Both cables have the same behavior.
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