WSM10012.6V MPPT Solar Controller — 100W compact controller for 12V systems Key benefits Maximum power extraction: MPPT tracking maximizes energy harvested from the solar panel to improve charging performance throughout the day. Reliable battery charging: Precise voltage regulation and an 8A output ensure stable charging for 12V battery systems and lithium battery strings. Durable and weatherproof: IP67 protection class and a flame retardant plastic shell provide robust operation in outdoor installations. Efficient and low loss: Conversion efficiency 95 percent or higher and low standby current help preserve battery capacity and reduce energy loss. Core functions and standout attributes Type: MPPT solar controller, model style WSM10012.6V; available variants with output to battery voltages of 12.6V, 13.8V, or 14.6V (4line). Output power: 100W; maximum charging current to battery: 8A. Efficiency: greater than or equal to 95 percent thanks to a conversion synchronous rectifier circuit, maintaining conversion even under lowpower charging conditions. Input compatibility: suitable photovoltaic panel open circuit voltage 2125V. PV input starting voltage greater than 17V. PV input tracking voltage range 1525V (one variant 1625V). Voltage and regulation: voltage regulation within 1 percent; load regulation 5 percent. Full load voltage drop 400mV; noload drop 100mV. Standby and static loss: noload current about 20mA; discharging module static current about 12mA. Protections: battery terminal short circuit protection, load short circuit protection, temperaturerelated protection features included. Environmental and mechanical: operating temperature range 40 C to +65 C. Mechanical shock and vibration performance: SAEJ1378. Physical: compact size approximately 63 x 32 x 18 mm (2.48 x 1.26 x 0.71 in). Weight about 2.9 oz. Material: flame retardant plastic shell. Ingress protection: IP67. Compatibility Designed for 12V battery systems and lithium battery configurations including 3string lithium setups and 4string lithium iron phosphate batteries. PV panel requirements: open circuit voltage 2125V and operating power voltage above specified thresholds. Practical use scenarios Solar street lighting: manage PV input and battery charging for autonomous street lights, maintaining consistent output through variable sunlight. Light electric vehicles: charge and protect 12V systems on solarassisted electric bicycles and tricycles. Offgrid small power systems: run and maintain battery supplies for remote sensors, small cabins, garden lighting, and portable solar charging stations. Why this controller solves common problems Maximizes energy capture from panels to reduce undersupply during low irradiance periods. Provides stable and accurate charging voltages to extend usable battery performance. Small footprint and IP67 rating allow placement in confined or exposed outdoor locations while resisting dust and water ingress. Builtin protections reduce risk of damage from short circuits and temperature extremes. What is included in the specification set Model options: 12.6V 4line, 13.8V 4line, 14.6V 4line. Output to battery current: 8A. Output power: 100W. Efficiency: >=95 percent. Size, weight, material, and operating range as listed above. This MPPT solar controller is intended for reliable, compact solartobattery charging applications where efficient power conversion, precise voltage control, and outdoor durability are required.