PowMr 100A MPPT Solar Charge Controller 12V 24V 36V 48V Auto, 100Amp Negative Ground Solar Panel Regulator, Aluminum Housing for LiFePO4 Lead Acid Battery, Fits RV Marine Off Grid

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【System-Specific PV Input & Power Ratings – Critical Specs】This controller auto-detects 12V-48V batteries. Maximum PV input depends on your system: 12V System: 80VDC max input / 120W max solar; 24V System: 105VDC max input / 2400W max solar; 36V System: 150VDC max input / 3600W max solar; 48V System: 150VDC max input / 4800W max solar; Always check your solar panel's Open Circuit Voltage (Voc) before connecting. 【Harness 99.9% of Solar Power with Advanced MPPT】 Our MPPT technology delivers 99.9% real-time tracking and up to 98% conversion efficiency, extracting maximum energy from your solar panels even during cloudy days or sunrise/sunset. Perfect for RVs, off-grid cabins, and marine systems 【Versatile Battery Support & 3-Stage Charging】Compatible with Sealed (SEL), Gel (GEL), Flooded (FLd), and Lithium (LiFePO4) batteries. The 3-stage charging (MPPT, Absorption, Float) optimizes battery performance and helps extend its service life. (User-defined parameters available in USE mode) 【Robust Aluminum Alloy Case & Smart Cooling】The durable aluminum alloy housing provides superior heat dissipation, ensuring stable performance even under heavy 60A charging. Combined with a temperature-controlled fan (activates >104°F/45°C), it keeps the controller cool, quiet, and safe for years 【Comprehensive Protections with Real-Time LCD Monitoring】Built-in protections: PV reverse polarity, load overcurrent, battery overvoltage, and over-temperature shutdown (fan activates at 65°C/149°F). Large LCD displays PV voltage, battery voltage, and charging current. Compact size: 10.79 × 6.61 × 2.83 inches; 4.94 lbs 【Note】If you use sealed lead-acid, vented gel batteries, etc., you do not need to set any parameters, the controller can be automatically adjusted and work normally; but if you use lithium batteries, you need to adjust the parameters according to the actual battery voltage, because lithium batteries are unstable, for example, acid batteries 12V is 12V, while lithium batteries 12V may be 11.1V or 14.8V 【！】Please note that the PV input must be disconnected before setting parameters. If the solar controller displays night mode, please perform a reset using the following method: With only the battery connected to the controller, press and hold the last button for more than 5 seconds to restore the solar controller to factory settings.