美国采购需求：20kwh 电池，400ah 电池，充电逆变器电池，家用电池，即插即用电池，动力轮电池

I'm interested in purchasing a 20kWh battery pack and would like to know the pricing details for this product. It would be helpful if you could provide information on any available options, payment terms, and lead times for delivery. Additionally, if you have any specifications or features that differentiate your battery packs from competitors, please share that as well. Understanding these factors will aid in making a more informed decision moving forward. Looking forward to your prompt response!