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That is the sunsynk server going down causing your inverter to think it is midnight and resetting the daily totals Easily spotted in the data

Thank you for the suggestions, criticism is always welcome. I so wish I was "waiting" for the stock. Most of my times goes into developing and improving firmware, this is my marketing strategy Busy with development the 3Phase High Voltage solution for industrial automation so that I can compete with SCADA world. I am also busy with the coding of a ATESS module on the side. This is for a mine with almost a MW of solar, so hoping we can save them some diesel bills by being able to automate things based on the state of their solar system and schedule To me my website is my wheelbarrow, it needs to get A to B.

@Sc00bs why kick a man when he is down? I do sell locally. I have 2 dongles available that I sell with firmware at this stage (that is my only stock I have) I do have about 40x Geniune ESP32 Microcontrollers that was delivered this week but those are useless on their own. I have a stack of dud circuits that never made it past testing. I do not sell those, I am not that kind of person. Just currently out of stock and having the worst Feb. R12K out of pocket waiting for my package and I have bills to pay. My package has been stuck for more than 3 weeks and I sold out on 7Feb. Luckily the tracking shows it moved again, so I will have stock around then end of Feb if I judge by other shipments.

Your communications board in the inverter is dead. Get it replaced under warranty

Yes, I have clients running completely off-grid and the Gen is connected to the Grid input and the AUX/GEN is used to run aircons and other non-essentials. The inverter can still start the Generator via normal inverter logic and charge the battery to the desired level (According to the Time-of-use)

Just a business with the usual, office equipment, coffee, aircons etc. It is scary to see how much power the sun can produce. For any large business it makes sense to go solar

Not my system... just thought I would brag with these numbers... 2x sunsynk 50kW

Sunsynk 50kW High Voltage system .... stupid amount of power. Loving the powerflow card! perhaps a small bug to note... The Daily load cuts off the last h on (kWh) once you go over 100kWh

I have been running a Daly for 2 years. Initially I thought there was an issue with the Daly BMS, turned out to be poor contact on my DIY battery busbars. I discovered this when I started logging the cell data into home assistant and graphed them over time. The BMS does it's job, the balance function is rubbish but that is true for most other BMS brands.

Yes it is possible. Unlikely but still possible. Replace the ESP32 and the cable too. You can measure with a multimeter between pin 3 and 1... and 2 and 3... they should measure 4V and 1V more or less from the inverter. Pin 3 is ground and 1,2 the rx/tx lines

There is a big difference between a direct lightning strike and an induced spike. Induced spikes will kill circuits connected to a long wire (that acts as a signal amplifier). You Esp32 is still working and sending wifi packets which is a good sign. Maybe just the MAX485 chip that was harmed in the process. Do like mechanics do. Start replacing parts till it starts working again...

The that specific comms board that everyone butchers and remove R7 was designed for use in an arduino with 5V signalling The ESP32 was only designed for 3.3V so the io pin might be dead. Try another GPIO for RX It could also be a lightning strike nearby that induced a spike

The timer is purely for when you do not have solar and need to run in UPS mode where the grid charges your battery. You should not turn it off if you have solar. Set the required SOC to keep in reserve for that time, if it goes below the soc the inverter will switch to grid power. You should also be posting this question in a new thread or a related thread as it has nothing to do with the 8kW dat collection setup, basic forum etiquette

Just measure the voltage on the canbus wires coming from the bms... you should see voltages that fluctuate 0-4V

JKBMS over bluetooth, with comms to the Sunsynk/Deye via CAN port to derate the charge current discussed over here

This is the current strategy to try to get them balanced with the inverter. My friend ran his setup on Voltage based settings for over a year on the JKBMS, before that he used a Daly and the balance function can be compared to the effectiveness Eskom. Once you log and graph cell voltages it is easy to see cells that have a poor contact. After seeing the "Peter board" I was inspired so told him we were going to fix his battery and get his SOC working on the inverter. This is the progress till now. Just though I would post some graphs and show people what is possible. Planning to sell some circuits once I fix all the issues

This is a 300Ah battery... 300Ah * 16cells = 4800Ah at 3.6V.... How big is you 3.6V Charger? This will take a lifetime (and a bit more). Currently working and keeping the Eskom bill close to 0 so there is no real benefit to having nicely balanced cells. They are second life cells in any way

I fully agree with you. This is not my battery but belongs to friend of mine. It used to be managed by a DalyBMS which stopped working (probably due to user fault) From the graphs this is easy to see: Cell 2 needs to have the contacts torqued as it seems to have more resistance to charge and discharge. Hoping that the JKBMS can fix the imbalance of cells over time with the 2A balancer. I also helped him implement a charge current derate function to step down the currents as the highest cell approaches 3.5V so that the balancer has a fighting chance. All managed from Home Assistant

JKBM connected via Bluetooth to the module and updating the Deye inverter via CANBUS. But technically any inverter that supports the pylontech protocol will work, even Axpert/Voltronic/Goodwe inverters. With the added benefit of being able to track individual cell voltages in home assistant

This is easily done via Home Assistant, look in my signature for more details

Went down the rabbit hole already and got to a dead end By the way I got some of those JST connector wires you mention from communica already, they don't match the image and they are only female so they cannot plug into the bms. Getting stuff in SA is such a pain, I wish the post office will just close shop so we can privatise it.

Inspired by Andy and seeing the "Peter board" I also started working on this. I have a module that reads the values over bluetooth (makes them all available via Home Assistant) and updates the inverter over CAN (Pylon protocol). Still playing with the idea of exposing the charge and voltage values so you can implement your own automation to control this. I did this very successful on my Deye by limiting the max charge current, but I am thinking of all the people with other inverters that would like to customise the way the batteries gets charged. I will probably sell some boards to help people get their JK's hooked up to their inverters and also their Home Assistant

ESP32 Boards are not all the same, the WROOM might be an original Espressiv or it might be an Clone from some electronics factory in China. I prefer to buy the ESP with geniune Espressiv boards, rather pay a little more and get one of the brands that deliver good quality than gamble with a no-name board. Seen too many complaints about cheap boards with rubbish wifi. You get what you pay for. The PSU 5V also gets converted down to 3.3V and the filter capacitors on the cheap boards might also be the cheapest option available. So stick to the brands even though they cost 2USD more

Technically the comms is just a wire and you could listed for all the logger stick messages (without affecting the logger), decode the messages use and store the data yourself. Once you understand modbus format then decoding is quite easy. Thus far I have only pulled data from solis inverters without a logger stick

Seems like with most inverter makers... the hardware is great, but the cloud is more like a best effort approach. I sometimes wonder how can they offer a free cloud service from a once-off sale, and the inverter is likely to last 10 years It costs money to maintain systems, they should just charge a monthly fee. If this was my inverter I would just store the info in home assistant.