Wanderer 40A MPPT Solar Control Panel with Autofocus 12V 24V Display (with USB Port and LCD Display) <ul class="a-un0rdered-list a-vertical a-spacing-mini"> <li class="a-spacing-mini"><span class="a-list-item">This solar charge controller is only suitable for lead-acid batteries: 0PEN, AGM, GEL. It is also suitable for NiMH, Li-ion, or other batteries. </span></li> <li class="a-spacing-mini"><span class="a-list-item">There are many types of MPPT technology. Our solar charge controller uses MPPT technology that detects the maximum charging current, rather than a boost type or automatic charging based on the solar panel voltage. Compared to ordinary solar charge controllers, this MPPT controller can improve efficiency by 10%-30%. </span></li> <li class="a-spacing-mini"><span class="a-list-item">When the battery voltage is low, the controller will automatically stop system charging. If the battery voltage returns to normal, the load will resume operation. </span></li> <li class="a-spacing-mini"><span class="a-list-item">This MPPT controller has a complete SOC function that can control the charging current and power the load. It prevents the battery from overcharging and over-discharging, and transmits the power of the load to the solar panel at night. </span></li> <li class="a-spacing-mini"></li> </ul>