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I purchased MPP solar 3048LV-MK direct from MPP solar via email. They reply email rapidly when I am asking quest about purchase, mostly reply in one day or few hours. After I got my 3048LV-MK, I found it has strange sound in the inverter when I move the inverter, sounds like loses screw drop...

I am new to this forum, and wanna build my own energy storage system. Unlike most people in this forum living in North America, I can't easily find a dealer to purchase a battery in my country, so I choose to search for it from Alibaba. My target is a 48V100AH server rack battery, and got some...