Review on 🔆 5-Watt Solar Battery Trickle Charger by Sunforce - Black by Steven Saric

Several reviews state that the panel drained its batteries when plugged in. Mine did the same. I opened up the black junction box and the red and black wires were correct. Verification with a meter showed that the positive and negative sides of the plate were wrong. Switched red and black and made sure the diode was connected in the right direction. Now the panel keeps the battery discharged. Although the performance is very low. Less than a watt measured on the dashboard in the late summer sun.