Review on 🌞 Efficient 12V Solar Panel Kit: Topsolar 30W Charger + 10A Solar Charge Controller + Mount Bracket for Car, RV, Boat, and Off-grid System by Brandon Woodson

The name says it all. Installation was easy. The charge controller says everything is fine, but it was sucking blood from two different 12-volt batteries. Some comments imply that this device should work without the battery connected (charging devices with USB ports, etc.), but this controller doesn't work that way - the load is powered by the battery, including USB ports. My controller also shows the load - both with an LED and voltage, but there is no load. I just wanted to charge the tool batteries in my shed.