Renogy 30A 12V/24V PWM Solar Charge Controller with LCD Display Flush Mount Design Negative Ground, Compatible with Sealed, Gel, Flooded and Lithium Batteries, Adventurer 30A,black ?12V/24V Automatically Detect?Automatically detects 12V or 24V DC system voltages (for non-lithium batteries). The LCD screen and multiple LED indicators display the solar charging and battery operation information, customizable parameters, and error codes. ?Smart 4-Stage PWM Charging?Smart 4-Stage PWM charging (Bulk, Boost, Float, and Equalization) increases battery life and improves system performance. Intelligent protection against reverse polarity, overcharging, short-circuit, and reverse current. ?Flush Mount Design?Designed to cleanly flush mount on walls, providing a sleek, integrated look. An included Surface Mount Attachment allows for versatility in mounting. ?Negative Ground?The Adventurer is a negative ground controller. This ensure compatibility with any negative ground system, which is the standard and most conventional way of grounding. Any negative connection on the solar module, battery and load can be safely earth grounded as required. ?Multiple Battery Adaptation? Deep Cycle Sealed (AGM), Gel, Flooded and Lithium battery option ready. ?Real-time Monitoring?The RS232 port can work with the BT-1 Bluetooth module to deliver real-time energy data across the DC Home smart phone app Renogy ONE M1 Meet the Renogy Adventurer-Li, newly improved with two advanced features. Thanks to its programmable Lithium charging voltage, the 30A PWM solar charge controller is now capable of charging most Lithium batteries available on the market. The second addition to the controller is the RS232 port, used to connect and communicate with the Renogy BT-1 Bluetooth module. By adding the BT-1 to the Adventurer-Li, you can now use the smartphone app, Renogy DC Home, to monitor and adjust your solar system remotely. Unique in its form, the Adventurer-Li is a negative-ground, flush mount controller, designed for an aesthetically clean and integrated look on RV and camper walls. However, if flush mounting does not appeal to you, an included Surface Mount Attachment allows you to forgo it. Capable of charging both 12V and 24V photovoltaic systems, the Adventurer-Li integrates highly efficient PWM charging to increase battery longevity by regulating the charge flowing from the solar panels to the battery bank. This charge controller comes equipped with a fully comprehensive self-diagnostic system and electronic protection functions to prevent damage from installation mistakes or system faults. Shipping We offer FREE shipping on all orders in US We ship within One-Three business days of payment, usually sooner. We use a selection of shipping services such as UPS, FedEx, USPS etc We offer free shipping to the lower 48 states and ship within 1-3 days of payment, usually sooner. For shipping outside of the continental USA International customers are responsible for all duties and taxes. Return You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. Return Policy ? We guarantee against any defective or misrepresented products. The original shipping label must be sent back to us to validate the return. A full refund can only be issued during the first 30 days upon receipt of the product. ? Returns will be voided if the product is mishandled or physical damaged by customer. ? Buyer will be responsible for all kind of return shipping/shipment to the seller for resolving the problem. ? Returns made for all non-defective, undamaged products are subject to a 15% restocking fee. Shipping and handling fees are absolutely non-refundable. If an item is returned to us due to an address issue, we do charge a reshipping fee to reship. If you would like a refund, there will be a 15% restocking fee applied. ? All returned products need to be assigned an RMA # (Return Merchandise Authorization #) prior to return. Please contact us through's messaging system to obtain an RMA# for the return. Any returned product without an RMA # on package will not be accepted or processed? Please contact us before returning. Payment We accept payment by any of the following methods Please pay as soon as possible after winning an sale, as that will allow us to post your item to you sooner! Feedback Customer satisfaction is very important to us. If you have any problem with your order, please contact us and we will do our best to make you satisfied. Feedback ? We appreciate your feedback and our system will automatically leave feedback for you after bid ends. ? 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