Can this inverter be connected to a battery?  No, it is a grid-connected inverter and must be connected to the power grid.  Can it be directly used to power the appliance?  No, it cannot directly supply electrical appliances, it needs to be connected to the grid first.  Why does its indicator light keep flashing?  This is because they are searching for the maximum MPPT, and after locking, it will always be green.  Can it be used with other grid-connected inverters?  You can connect its AC output to the switch together. Are they waterproof?  Yes, they are IP65-rated waterproof, but we do not recommend installing them directly in the open air, it is best to install a roof or install them under solar panels. What about the lead time? Small batch orders are shipped within 7 days, and large batch orders need to be negotiated.  Do you have any MOQ limit ?  We don't have a request on MOQ.  How do you ship the goods and how long does it take to arrive?  For small batch purchases, we usually use courier companies such as DHL, UPS, FedEx or TNT for delivery. It takes about 7-15 days. For bulk purchases, we usually use sea transportation, which takes about 30-45 days. Is it OK to print my logo on products?  Yes. We can provide this service when purchasing more than 200 units. Please send us related designs in advance to confirm the design.  Do you offer guarantee for products?  Yes, we offer 5 years.