Thanks. If you get anymore info on it let me know.
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.
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.
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.
Why two Seplos? Plenty have parallel packs with just the one BMS
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.
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.
Possibly better off with a sunsynk or sofar
As they can do a sustained 100 amps to the battery
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
I don't know much about them so after a quick glance, Dyness 2.4 and 5.1kWh.
Are they good /bad/okay/reliable?
Look on midsummer / Rexel and Failte solar and tell me what your looking for.
I was looking for fitted prices but it would help if you can give a rough guide.
I can give you prices for anything from any of the irish wholesale guys. No idea on DIY gear.
Anyone up to date on current battery costs?
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.
I think you're mixing a few things up here. All solar inputs of all regular inverters (hybrid or not) are MPPT.
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.
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,
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
Any guide on how to connect neey to esp32?
Lithium iron phosphate. 16S1P configuration.
Lithium, and more specifically Lithium Iron Phosphate .
Have a PureDrive SOL-R16-5kw for my Solar Panels.
Could anybody tell me if it is a Lead Acid Battery or a Lithium Battery
Your house sounds similar to mine, I would say if you dropped the temp to 20 or 21 (lower if you can take it) and you will save enough money to pay for all the upgrades you plan within 5 years. The difference in cost for heating as you increase the temp is substantial IMO. We took 1/3 of our bills just by dropping 2 degrees in what was a B1 (now A2).
6kW Solis
20kWh LiFePo4 from OYE on AliExpress
ZEVA BMS
Neey balancer
Only got around to fitting the balancer the other week, it's been sat in the attic for about 3 months.
I was home yesterday due to the bank holiday so decided to bit the bullet and balance up. Charged fully overnight with the pack voltage set at 56v. Got to around this point.
Balanced to within 0.003v but I couldn't get it to increase as the charge kept getting throttled even when I increased the voltage in the bms to 57 and then 58v.
Eventually figured out that the inverter still had a limit set.
Battery overvoltage was set to 56.5v and the inverter will throttle the charge down once you're getting close to that. Increased that to 59v and it allowed me to push the charge up to the level I needed.
Once it tipped 58v the bms reset the SOC to 100% and that was the job done.
Currently down at about 33% as I'm squeezing a few units into the car before I go to work.
That's as close to perfection as it gets, @DrPhilG. Well done.
Care to share what you did balancing and what hardware you have, what size battery, what inverter, what BMS and I guess a 4A NEEEEYYYYYYY?
A successful day spent balancing batteries.
Ignore b17-24 you only have 16 cells.
B- to most negative(black)
B1-b16 to positive of each cell
And b+ (red) to the most positive, which will be the positive of cell 16.
Here is my setup. Do i need to wire B01 to B24 and plus/minus?
IIRC it's on the AliExpress website if you bought from one of the main suppliers. Pretty straight forward anyway, if you through up a picture here, we'll tell you what cells the balance wires should connect to
