The ProteusX 20A PWM Solar Charge Controller is a rugged, waterproof PWM controller built for off‑grid and mobile setups. Its negative-ground design ensures compatibility with standard negative-ground systems found in boats, RVs, campers, and remote installations, while a bright blue back-lit LCD keeps essential status information at a glance. Negative Ground Design: Fully compatible with traditional negative-ground systems, simplifying integration with existing setups. Waterproof Construction: Designed for indoor, outdoor, marine, and camping environments to withstand the elements. 20 Amp Continuous Charging: Supports up to 12V/360 watts or 24V/720 watts for reliable daily charging. Auto 12V/24V Sensing: Detects system voltage automatically for seamless, hassle-free operation. 8 Battery Types Supported: Compatible with Lithium-ion, LiFePO4, LTO, Gel, AGM, Flooded, Crystal, and Calcium batteries. Bright Blue LCD Display: Large, back-lit screen shows volts, amps, amp hours, and battery presets, plus error codes for quick troubleshooting. 5-Stage Charging: Soft (pre-charge), Bulk, Absorption, Equalization, and Float stages optimize capacity and extend battery life. Comprehensive Protections: Includes reverse polarity/battery connection protection, anti-backflow at night, over-temperature, and over-voltage safeguards. What’s Included: 1 ProteusX 20A Solar Charge Controller and 1 User Manual for setup and reference. The ProteusX 20A is designed to deliver reliable, year-round charging for diverse off-grid scenarios. The 5-stage charging profile helps maximize usable capacity and longevity across a mixed battery bank, while the LCD panel provides clear visibility into system health and performance. With waterproof construction and broad battery compatibility, it’s a practical solution for boats, RVs, cabins, and camping setups that rely on solar to stay powered. The built-in protections reduce common risks like reverse current and overheating, giving you peace of mind as you rely on solar power in remote locations. Ships from supplier: ACOPOWER