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 hope this message finds you well. I'd like to clarify whether the service package you offer includes cleaning and maintenance for the panels. Given the importance of keeping the panels in optimal condition for performance, it would be great to know if this aspect is part of the overall service. Additionally, could you provide more details about what the maintenance entails? Understanding the frequency and types of maintenance included will help us evaluate the overall value of the service package. Looking forward to your insights.