美国采购需求：电池管理系统、BMS电池、BMS模块、锂BMS、BMS锂电池、Lifepo4 BMS

I'm looking for a comprehensive solar remodel service to upgrade our current installations. Specifically, I need to understand your offerings in terms of system design, installation, and any necessary permits. It's vital that the service can cater to both residential and commercial settings. Additionally, I'd like to know about the materials you use and any energy efficiency solutions you provide. Please share details on your pricing structure, lead times, and any warranties or maintenance packages available. This info will help in making a well-informed decision for our future projects.