Experience seamlessly solar power management with our intelligent solar controller, featuring auto detection for 12v and 24v battery systems, eliminating manual setups and enhancing user convenience Equipped with high efficiency charging management, this controller offers 20a/30a models, effectively managing solar panel and discharge, extending battery life, and ensuring best performances for homeowners seeking sustainable energy solution, outdoor enthusiasts requiring reliable power during camping trips, and small business owners needing power sources for shops or farms Perfect for integrating into home solar systems, providing essential power in remote areas, serving as mobile power source on vehicles or boats, and acting as emergency backups during outage With its clear LED display, users can easily monitor battery charging and load conditions Rated output current (A):40A Low voltage protection voltage (V):10. 7V*2/3/4 High voltage protection voltage (V):15.5V*2/3/4 USB output interface(V):5V2A*4 Solar panel photovoltaic input power (W):12v<660W;24v<1320W Color: White Material: ABS Package Contents: 1*40A solar controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.