Lithium battery activation function by PV or utility. Compatible with LiFePO4 battery via RS485. PV input 450Vdc Max. Removable dust cover for harsh environments. Supports multiple output priorities: UTL. EQ function to optimize battery performance and extend life cycle. We will respond to your question promptly within 24 hours. If you encounter any issues during installation or use, please first record a video demonstrating the problem and send it to us. This will enable our engineers to resolve the issue more quickly and accurately. Thank you very much. Our warehouse is located in US. We recommend recording a video when unpacking for record-keeping and processing purposes. We know your expectations and trust in shopping, so we have launched a. Your Best Supplier of Solar Inverter. We have a professional solar inverter engineering team with more than 10 years of solar inverter R&D experience. We are committed to providing smart solar energy for areas where needs electricity. We are always focusing on the demands of users. Easy to install, easy to use, flexible solution for different applications are our product design targets. We are equipped with a strong professional sales and after-sales teams. We will do our best to provide the longest protection for your solar system through professional technology, excellent service and reliable product quality. We will reply you within 24 hours excluding Holidays and weekends. Feedback is important to us, we will leave positive to our customers. We have the professional engineer team and afte-sale, we will try our best to help you out. We understand the concerns and frustrations you might have, and will do our endeavor to resolve the issues. Please give us the opportunity to resolve any problem.