Features: brand new and high quality MPPT high-efficiency charging method, the charging efficiency is 97%. The overcharge for protection function effectively protects the battery from overcharging. Anti-reverse connection for protection, both the battery and battery board have anti-reverse connection for protection. Short circuit for protection, with child lock, safe and convenient. It can be applied to all kinds of batteries, the battery board takes power, and the standby power consumption is 0. Specifications: Battery Voltage Range: 24v/36v/48v/60v/72v (18v Battery Board) 48v/60v/72v (36v Battery Board) Maximum Charging Current: 16.7A Maximum Solar Panel Power: ≤300w Solar Panel Input Voltage: 12v~50v (the Voltage of the Solar Panel Needs to Be Lower Than the Battery Voltage) The Highest Charging Voltage (that Is, Overvoltage for Protection): 28.8v(24v), 43.2v(36v), 57.6v(48v), 72.0(60v), 86.4v(72v), Can Be Set by Yourself Mppt Voltage Range: 12v-50v Maximum Conversion Efficiency: ≥97% Load Loss: 25ma (18v Battery Board to Charge 24v Battery) 20ma (36v Battery Board to Charge 48v Battery) Mppt Tracking Efficiency: ≥98% Working Temperature: -35℃-65℃ Insulation Resistance: AC1KV, 5min Test/>=20 Megohms for Protection Level: IP30 Size: Approx. 156x43x81mm/6.14x1.69x3.18inch Package Includes: 1x Solar Charge Controller note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.