When I buy anything online I can never get it delivered any closer than 250km away, these batteries came right to my door. I bought 3 x 300ah, 15kw batteries. They are extremely well made and operate perefectly. All new batteries are used in all their products. They have many differrent communication protocals built into them. You can even just connect them to the busbar and they will float perfectly off busbar voltages. the only regrets i have is the manual needs improving and where I'm located I can not get an app to work with the batteries or the inverter (Deye), either one seperately. When I write for help, i get a fadt and professionsl response. When they say they will get back to me then they do. So service is great.