ScrotpusGobbleBottom
Corn Pop was a bad dude.
What should it be?What's your charge efficiency set in the battery part of the shunt?
What should it be?What's your charge efficiency set in the battery part of the shunt?
Lifepo4 batteries are pretty good for charging without loss, so 99% is usually ok, you can just play with it to get the battery SOC accurate, but drift does happen and i haven't found a real accurate way to keep it in sync, it's a best effort.What should it be?
That is what I figured. Thank you!Lifepo4 batteries are pretty good for charging without loss, so 99% is usually ok, you can just play with it to get the battery SOC accurate, but drift does happen and i haven't found a real accurate way to keep it in sync, it's a best effort.
No idea. Mine has been working flawless for 3 weeks now since commissioned. Might need that resistor that is optional. Someone else will be along to help im sure.I set this up with a Solis inverter and it worked perfectly for a few ours and then failed (I could see the ESP was still receiving the correct data from the smart shunt but it said it was unable to communicate on the CAN bus), so I replaced the MCP2515 board thinking that it may be the fault. It then worked again for a few hours and failed again, does anyone know what the issue may be or has anyone had a similar problem?
Do you have the CS wire on the correct pin on the ESP32? Only thing I can think of is either incorrect pin (GPIO2 in the code base unless modified) or loose connections. Have you tried another cable between MCP and inverter.I set this up with a Solis inverter and it worked perfectly for a few ours and then failed (I could see the ESP was still receiving the correct data from the smart shunt but it said it was unable to communicate on the CAN bus), so I replaced the MCP2515 board thinking that it may be the fault. It then worked again for a few hours and failed again, does anyone know what the issue may be or has anyone had a similar problem?
No idea. Mine has been working flawless for 3 weeks now since commissioned.
Just want to thank you for standing behind this awesome DIY interface and trying to help people with it. I knew you would chime inDo you have the CS wire on the correct pin on the ESP32? Only thing I can think of is either incorrect pin (GPIO2 in the code base unless modified) or loose connections. Have you tried another cable between MCP and inverter.
I’m at two months with zero issues. Getting ready to add another 10kwh battery behind it.
I am not sure. I Calibrated to hit 99% at 3.65/cell and now am charging to 3.48. Not an issue really. I know turning off the pylon switch helped but I remember it triggering again. Let me know what you figure out.did you ever get the 100%SOC leveled out?
I think it will always say that. Its just a communication thing. The switch disengages the "genuine" protocol and inserts a more generic "modified" pylon tech that causes less trouble. That is the way I think it goes anyways.it still says that it is sending the Pylontec string
Agreed, always says it on the serial monitor, just make sure it’s disabled.I think it will always say that. Its just a communication thing. The switch disengages the "genuine" protocol and inserts a more generic "modified" pylon tech that causes less trouble. That is the way I think it goes anyways.
If the Chip Select for the MCP2515 was incorrectly configured, the CANBus wouldn't work at all.Do you have the CS wire on the correct pin on the ESP32?
Similar yes... I have destroyed a few CANBus adapters - see below. But... can you confirm whether you touched anything when it failed, especially connecting or disconnecting batteries or swapping and earth connection, or generally fiddling with the system?so I replaced the MCP2515 board thinking that it may be the fault. It then worked again for a few hours and failed again, does anyone know what the issue may be or has anyone had a similar problem?
I am still having intermittent issues, we managed to catch the failure happening yesterday (screenshots below), it seems to fail and then try to restart but that doesn't work. Then when we go a do a hard reset by physically pushing the button on the ESP it starts working again. Do you have any idea what might be causing this?Agreed, always says it on the serial monitor, just make sure it’s disabled.
Still having the intermittent issues @Josh4?
Thanks, I do think this could be the issue, is there a good galvanic isolator CAN chip that you used that you would recommend?If the Chip Select for the MCP2515 was incorrectly configured, the CANBus wouldn't work at all.
Similar yes... I have destroyed a few CANBus adapters - see below. But... can you confirm whether you touched anything when it failed, especially connecting or disconnecting batteries or swapping and earth connection, or generally fiddling with the system?
My system is largely based on Simon's code - at least on the CANBus side of things - and has been working flawlessly since 2022 However, I have managed to zap a few MCP2515 modules when I have done some maintenance or generally messed with the system.
This is due to the Solis having battery -ve sitting at -195V compared to AC ground, as detailed in my thread here.
isolation of battery to inverter comms
I'm trying to get my head around how I've managed to blow a CANBus adapter (and fuse). Does anyone have experience of surge voltages may present on a battery to inverter CANBus link, when a battery is re-connected? In my case, I have a Solis hybrid (AIO) inverter, connected to my 14.3kWh...diysolarforum.com
The solution will be to use a galvanically isolated CANBus adapter... or be very careful to disconnect the CANBus before making other changes.
Obviously, without more info, I can't tell whether that is your issue, but IMHO would be worth considering.
I have obtained one of these...Thanks, I do think this could be the issue, is there a good galvanic isolator CAN chip that you used that you would recommend?
I am as well. Its worked great for two months. Can’t wait to see what’s next.I am excited for this!
I have a very interesting discovery to share...
...Yes, I am being purposfully long winded here haha....
...But as mentioned the current is summed.
Parallel.But you've still kept us in suspense... did you wire the shunts in serial or parallel