12V 24V PWM Solar Controllers LCD Display Solar Charge Controller with USB (30A) Features: Build-in industrial micro controller, convenient e. Large LCD screen display with 5V USB charging function. Complete PWM charge management, practical e. Dual MOS reverse current protection ,low heat production. Build-in overcurrent/short-circuit protection, open-circuit protection, reverse protection, over-load protection. Specification: Condition: Material: Plastic Size: Approx. 12.4*6.4*3.2 cm / 4.9*2.5*1.3 in Weight: Approx. 192g / 6.8 oz Package list: 1 * Solar Controller 1 * User Manual System Connection: 1. Connect the battery to the charge regulator - plus and minus. 2. Connect the photovoltaic module to the regulator - plus and minus. 3. Connect the consumer to the charge regulator - plus and minus. The reverse order applies when deinstalling! Safety Instruction: 3. This controller is only suitable for all kinds of lead-acid batteries (including suitable for OPEN/AGM/GEL). Do not use them on other batteries (including lithium batteries, nickel-metal hydride batteries, etc.) 4. This controller can only use photovoltaic panels as the charging source. Do not use DC or other power sources as the charging source. 5. The controller will heat up when it is running. Please pay attention to install the controller on a flat and well-ventilated surface.