Solar MPPT Charge Controller for 10 to 30V Batteries Key benefits Protects battery and system automatically: built in overheat, short circuit, and input under voltage protection reduces risk of damage and downtime. Improves solar charging efficiency: MPPT efficiency and low no load loss maximize usable power from panels. Flexible and easy to install: adjustable output voltage and compact aluminum housing fit a range of small solar systems. What it does MPPT tracking maximizes power extraction from solar panels and delivers stable charging to batteries. LED display shows input and output voltage and current for clear, real time monitoring. Output voltage is adjustable from 10 to 30V to suit different battery chemistries and charging requirements. Protection and automatic responses Overheat protection: when internal temperature exceeds 100 C output power is reduced; if temperature reaches 110 C output is turned off. Controller resumes automatically when temperature falls below 85 C. Short circuit protection: if the controller output is shorted, output closes automatically and returns to normal after the short is cleared. Input under voltage protection: if input DC voltage falls below 15V the controller shuts down to protect the system and automatically restarts when input voltage returns to normal. Compatibility and electrical specs Suitable battery charging voltage range: 10 to 30V, compatible with lead acid, lithium ion, and other batteries within this range. Photovoltaic input open circuit voltage: 18V to 55V. Photovoltaic maximum power voltage and tracking range: 17V to 55V. Output to battery current: maximum 25A. Output power options: 200W, 300W, 400W. Photovoltaic input starting voltage: 18V to 55V. No load loss: 0.35w. PWM conversion efficiency: 97 percent. MPPT efficiency: 99 percent. Voltage adjustment accuracy: 1 percent. Load adjustment accuracy: 1 percent. Construction and installation Material: aluminum housing for durability and heat dissipation. Item size: 130 x 80 x 40 mm. Item weight: 450 g. Mounting pitch: 110 mm x 70 mm. Installation hole diameter: 5 mm. Installation wire length: 50 mm. Working temperature range: 40 to 65 C. Package size and weight: 160 x 90 x 50 mm, 500 g. Included 1 Solar recharge controller (selectable output power option). LED display for input and output current and voltage. Practical applications Off grid cabin or tiny home: charge a 12V or 24V battery bank from solar panels while protecting against overheating and short circuits. Recreational vehicles and boats: provide controlled solar charging for lead acid or lithium batteries with compact installation and clear LED readout. Remote equipment and backup power: efficient MPPT tracking and adjustable output voltage support a variety of small systems needing reliable charging. Why choose this controller Robust protection logic handles common fault conditions automatically and restarts when conditions normalize. MPPT efficiency and low standby loss increase usable energy from solar panels. Adjustable output voltage and wide input voltage range make the controller suitable for many battery types and panel configurations. Compact aluminum design and straightforward mounting make installation simple for DIY or professional setups.