Lithium, and more specifically Lithium Iron Phosphate .
Lithium iron phosphate. 16S1P configuration.
Any guide on how to connect neey to esp32?
Hi,
Connect to pc with usb cable.
From https://github.com/syssi/esphome-jk-bms download and
# Install esphome pip3 install esphome # Clone this external component git clone https://github.com/syssi/esphome-jk-bms.git cd esphome-jk-bms # Create/ edit a secrets.yaml containing some setup specific secrets wifi_ssid: MY_WIFI_SSID wifi_password: MY_WIFI_PASSWORD mqtt_host: MY_MQTT_HOST mqtt_username: MY_MQTT_USERNAME mqtt_password: MY_MQTT_PASSWORD # edit the esp32-heltec-balancer-ble-example.yaml file ( at the beginning put in MAC of your Neey # you can get from the neey app substitutions: name: heltec-balancer device_description: "Monitor and control a Heltec/NEEY 4A balancer via bluetooth" external_components_source: github://syssi/esphome-jk-bms@main mac_address: 3C:A5:51:XX:XX:XX # Validate the configuration, create a binary, upload it, and start logs # If you use a esp8266 run the esp8266-examle.yaml esphome run esp32-heltec-balancer-ble-example.yaml
Hi ,
have an issue with my Puredrive batteries(2 5kw) at the moment. I have a Solaris Inverter .
The Batteries store excess energy generated from the Solar Panels in the morning and reach 100%.
However once this occurs the batteries are then Drained down to 98% even if I have 6Kw being generated.
e.g Say Solar Panels are generating 6Kw all day long , House is using 2Kw all day long , and Batteries are at 100%
what should be happening is that 4Kw should be exported to the Grid , however 4.038Kw is being exported to the GRID .
IT seems that .038Kw is being taken from the Batteries and exported to the GRID . This reduces what is in the Batteries to 98% and it stays like this for the rest of the day .
Any idea what might be causing this problem , or is this what actually should occur.
Regards, Footfall789
Hi Guys,
I've decided on 32 x 280ah EVE grade B from Nkon. I'll configure as 2 x 16s in parallel and 2 x seplos BMS.
I also have 24 x 585w panels also on order. I plan to configure as 2 arrays of 12 panels (7kw).
Now I need to make a decision on inverters but I am getting myself confused between hybrid inverter vs solar MPPTs paired with standard inverters. Am I right to think the benefit of using a solar MPPT (e.g. Victron) is that the batteries can be charged much quicker? They hybrid inverters all see to have relatively low output currents in comparison.
Also the panels will be ~100 feet from the inverters - I think I need 10mm solar cable?
Any advice appreciated.
I think you're mixing a few things up here. All solar inputs of all regular inverters (hybrid or not) are MPPT.
I have 50M of 4mm DC cable between my panels and my inverter. No issues. You will be fine with 4mm with a 30M run. I considered using 6mm; but didn’t bother. Only have 9 panels per string. So maybe not a good comparison.
Anyone up to date on current battery costs?
I can give you prices for anything from any of the irish wholesale guys. No idea on DIY gear.
I was looking for fitted prices but it would help if you can give a rough guide.
Look on midsummer / Rexel and Failte solar and tell me what your looking for.
I don't know much about them so after a quick glance, Dyness 2.4 and 5.1kWh.
Are they good /bad/okay/reliable?
Undoubtedly I am. I think my question is what is the optimal setup for charging a large battery bank from solar and grid? would 2 x hybrid inverters (e.g. considering Solis 6kwh) do the job ok or am I better off with dedicated smart solar chargers e.g. Victron SmartSolar MPPT 150/100
Possibly better off with a sunsynk or sofar
As they can do a sustained 100 amps to the battery
Going to be selling a 5.1kw Dyness Bx51100 next month once batteries arrive from China. Any idea what a reasonable price would be? It was installed in February.
There's a boardsie a few posts back was asking about batteries, might be no harm getting in touch to see if he's interested.
Why two Seplos? Plenty have parallel packs with just the one BMS
Isn't the limit for Seplos 500Ah and if you go over you run into all sorts of problems? Like @Big Lar reported? My mate's system is also running very poorly since he doubled his battery size and is now also well over 500Ah.
I have 4 dyness b4850, do you know if the 5.1kw you have is compatible, can they be linked in? If so I’d be interested.
I don't know the answer to that, I tried to find out from suppliers/online but no one seems to know. Dyness didn't respond when I asked them.
Thanks. If you get anymore info on it let me know.
Moved to JK BMS ,that Seplos is up for sale on Adverts if anyone wants it, running fine but just don't seem to like 600Ah battery
Is that the case with all Seplos BMS units and batteries over 500Ah?
Purchased a Seplos recently but haven't installed yet, battery close to 600Ah.
What inverter are you using, I assume it is not communicating with the BMS if it is a JK.
Solis inverter, have an esphone device all wired up here to mimic a pylontech battery via canbus but stopped short for fear of damaging the inverter.
As an alternative I have setup the JK as a lead acid and have an esp8266 to send data to home assistant which actually works great. The SOC is important to me as I have scripts that run to charge the car and immersion when the battery is close to full, so I have all the data I need without tinkering any further.
My setup is near identical. But I wouldn't trust SOC from any BMS. If I wanted SOC for automations, I'd use battery voltage instead.
If you get the 100% calibrated properly it should stay pretty stable.
How come the worry about damaging the inverter, it's only CAN wires?
@graememk - "If you get the 100% calibrated properly it should stay pretty stable."
I'm not so sure about that. I'd like to see the way these BMS are programmed to calculate SOC. What's wrong with using voltage anyway as a more reliable measure of SOC?
Mine literally counts the power in and power out. I can show the code. I did have to tweak the original code as it did drift(no account for any loss due to internal resistance etc, so not perfect out of the box either)
Every couple of cycles it does get behind a lil bit but a full charge self calibrates it.
Can't tell the SOC from voltage unless it's 100% or 10-15% and then it's dependant on the load. That whole flat curve of LFP batteries can be hard to judge.
No idea how to calibrate the JK though, but there must be a way.
I'd say it is pretty reliable to tell SOC from voltage unless under load. And you can compensate for load.
