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Hi everyone! Some days ago i found out that my jkbms display was completely unreadable, but it was not a faulty bms or cable, just the display. JKBMS store on aliexpress was completely useless, they only considered to buy a new display, suggesting the bigger display, because the smaller one...

Hi everyone! I'm building my first offgrid system here in Italy trying to mantain at the lowest all the cost without sacrifice security and quality overall. What I have: - 4 jinko solar JKM240P-60 240W (55€ -54$ each) - 1 EPever MPPT XTRA4415N (200€ - 197$) What I have to buy: - 24V...

Hi, I have an electric scooter (3kW motor with 2.8kwh battery, similar performance of 125cc ICE) that I use here in north of Italy to ride home-work-home and I use it also in winter no matter what climatic conditions are outside. I can see that already the battery is not able to give all the...

Hi, to encreas the speed of charching batteries, I bought one of the cheapest bench power supply aviable on Amazon.it I used the Ningbo FTZ Hopewell DF1730SB3A with max output 3A 30V and it takes an eternity to charge the LF280K before the capacity test, absolutly a very good linear power supply...

Hi everyone! I'm an Uni student in civil engineering and I also teach in High school electronics and mechanics (or other classes as needes). I want to practise with the solar power building an offgrid system trying to spend as little as possible :) I hope to learn as much as I can from all of you ?

Hi! I'm almost ready to assebly my 8S LF280k battery but I need to buy the Anderson Connector and fuses,but locally (Italy) I'm not able to find those anywhere or with difficulties. I will use the battery with a JK-B2A8s20P-H and a 3500W inverter (EDECOA DPP35), I will theorically pull out max...

Hi, i'm charging individually my 8 LF280k before running the capacity test. I'm charging e.o. with an Ningbo FTZ Hopewell DF1730SB3A set to 3.6V at 3A (maximum value). All the cells were at 3.29V and IR 0.19-0.20mohm when arrived from Dongguan Lightning; the first 3 cells took about 30h to...

Hi to everyone, I'm facing this wonderful world knowing only the theory because I have never practise it seriously: i have my offgrid 12V 27Ah garage illumination, but nothing complex. Now I have the opportunity to buy 4 250W used panel and I want to use it also for my garage to practise in view...

Hello! in my house I had since 2016 this SMA sunnyboy 3000 powered by 12 solarworld SW 250 poly (250Wp) and this system has produced 27860MWh in it's lifetime (noth east of Italy) without ever a single failure. Now the region where I live, Friuli Venezia Giulia (FVG), has released 100million€...

Hi! After 1 year of use my 24V battery with 8 LF280K + JK B2A8S20P has a strange behavior. When i was using my AC split for heating it stopped working because the BMS has shuttled down for under voltage protection. I thought because it has ended the capacity so i turned off the inverter and let...