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'm reaching out to get some clarification regarding the service package you offer for the panels we are considering. Specifically, I would like to know if the cleaning and maintenance of the panels are included as part of the overall service. Given the importance of keeping the panels in optimal condition for long-term performance, it's essential to understand the full scope of services provided. Additionally, if cleaning and maintenance are included, could you provide some details on the frequency of these services and any associated costs? Knowing how you handle these aspects will help us assess the total value of your offering. I appreciate your prompt response as we are looking to move forward with our decision soon. Thank you!