Models MC4885N25 and MC48100N25 — MPPT Solar Charge Controller (Style MC4885N25 100A PV MAX Input 250VDC) Description This MPPT solar charge controller uses PowerCatcher maximal power tracking technology to find and hold the solar array at its maximum power point quickly and accurately. It is designed for offgrid photovoltaic systems to manage PV input and battery charging with efficiency, reliable protection, and flexible communication and configuration options. Key benefits Higher energy harvest: Advanced MPPT tracking increases energy capture by about 15 to 20 percent over traditional PWM charging and can track at up to 99.9 percent efficiency. Fast response and conversion efficiency: PowerCatcher tracking and digital power processing deliver fast response and circuit energy conversion efficiency up to 98 percent. Safe battery charging and compatibility: Supports lithium and multiple leadacid battery types with active voltage stabilization, temperature compensation, and protection against overcharge, opencircuit battery conditions, and BMS interventions. Scalable and adaptable: Parallel operation of 1 to 10 controllers increases total charging capacity for larger systems. Programmable relay output and standard Modbus protocol allow system integration and automation. Easy monitoring and setup: Builtin Bluetooth 4.0 BLE plus TTL and RS485 communications enable mobile app and PC monitoring, data logging, and parameter configuration. Features Models: MC4885N25 (85 A) and MC48100N25 (100 A) Rated battery voltages: 12 V, 24 V, 36 V, 48 V DC Battery voltage operating range: 9 to 64 V DC Maximum opencircuit PV input voltage: 250 V DC Rated charging current: 85 A or 100 A depending on model Communication: TTL, RS485, and builtin Bluetooth 4.0 BLE Tracking and conversion efficiency: MPPT tracking up to 99.9 percent and circuit conversion efficiency up to 98 percent Charging strategies: Preset profiles for lithium, sealed leadacid, gel, flooded, and custom settings; leadacid temperature compensation Battery safety: Active voltage stabilization for lithium battery opencircuit or BMS conditions, reliable activation support Power management: Current limiting when PV power exceeds controller rating; linear power derating for overtemperature protection Line loss compensation: Maintains accurate battery terminal voltage under cable losses Expandability: Parallel support up to 10 units to increase total charging power Outputs and controls: Programmable relay output for alarms or load control Physical: Weight 5.7 kg (12.57 lb); dimensions 314 x 227 x 121 mm Practical applications Remote offgrid cabin or tiny house: Manage PV arrays and charge a 12 V or 48 V battery bank efficiently while protecting lithium or leadacid batteries. Commercial backup power for equipment: Combine multiple controllers in parallel to meet larger charging requirements for 24 V or 48 V systems and monitor status via RS485 or Bluetooth. Mobile or field power systems: Use with solar arrays configured with panels in series and parallel to charge batteries for telecommunications, monitoring stations, or mobile workshops. What it solves Maximizes usable solar energy in changing light conditions through advanced MPPT tracking. Protects battery life by providing correct charging profiles, temperature compensation, and active voltage stabilization when batteries are disconnected or BMS intervenes. Simplifies system expansion and monitoring via parallel operation and standard communication protocols for remote data access and integration. This controller is suitable for offgrid photovoltaic systems requiring reliable, efficiency charging, flexible battery compatibility, and scalable power through parallel operation.