Model MC4885N25 / MC48100N25 MPPT Solar Charge Controller — 85A and 100A options, PV max input 250 V DC Overview This MPPT solar charge controller uses PowerCatcher maximal power Tracking technology to quickly and accurately find the solar panel maximum power point in variable conditions. It improves energy harvest, protects batteries, and adapts to different system configurations for reliable offgrid solar charging. Key benefits Higher energy yield: Advanced MPPT tracking increases charging efficiency by about 15 to 20 percent compared with PWM controllers and achieves tracking efficiency up to 99.9 percent. Faster response and stable output: PowerCatcher tracking and digital power design deliver fast maximum power capture and conversion efficiency up to 98 percent. Battery protection and compatibility: Supports lithium, sealed, gel, and flooded leadacid batteries plus custom battery settings. Builtin voltage stabilization helps activate lithium batteries and handles BMS opencircuit or overcharge conditions. Scalable charging power: Supports parallel connection of 1 to 10 units to meet larger charging requirements without exceeding each unit's rated current. Simple system integration: Multiple communication options and standard Modbus protocol enable monitoring, control, and secondary development. Core 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 Builtin protections: overtemperature derating, current limiting, shortcircuit protection, reverse polarity protection, and electronic failure detection Charging modes: MPPT with active voltage stabilization for lithium batteries; leadacid temperature compensation Charging management: lineloss compensation for accurate battery terminal voltage control; currentlimiting when PV power exceeds controller rated current Expandability: parallel function for combining multiple units Communication: TTL, RS485, builtin Bluetooth 4.0 BLE Protocol: standard Modbus support for monitoring and thirdparty integration User interfaces: LCD display plus mobile phone app and PC interaction via Bluetooth or wired communication Programmable relay output for custom control signals Physical data Weight: 5.7 kg (12.57 lb) Dimensions: 314 x 227 x 121 mm Practical applications Offgrid cabins and remote homes: Provide efficient battery charging from PV arrays to supply lighting, appliances, and DC loads while protecting battery health. RV and marine systems: Manage multivoltage battery banks and adapt to changing sun conditions for reliable onboard power and longer battery life. Small solar power systems for telecom, agriculture, or security: Combine units in parallel for higher charging capacity and integrate with existing monitoring systems using Modbus or Bluetooth. What this controller solves Maximizes energy harvest from solar panels in complex or rapidly changing lighting conditions. Prevents battery overcharge, undercharge, and premature aging with adaptive charging and temperature compensation. Allows easier system expansion and remote monitoring through parallel operation and standard communication protocols. Keeps the system running reliably with builtin protections and automatic power derating when . Compatibility and installation notes Use with PV arrays sized to keep opencircuit voltage at or below 250 V DC. Select model according to required rated charging current (85 A or 100 A) and battery system voltage. Supports standard communication interfaces for data logging and external control; Bluetooth enables mobile monitoring. Natural convection cooling, designed for quiet operation; follow installer guidelines for adequate ventilation and safe wiring. Technical summary Models: MC4885N25, MC48100N25 Rated charging current: 85 A, 100 A Battery voltage: 12 V / 24 V / 36 V / 48 V DC Battery voltage range: 9 64 V DC PV max opencircuit: 250 V DC Communication: TTL, RS485, Bluetooth 4.0 BLE Protocol: Modbus Weight: 5.7 kg (12.57 lb) Size: 314 x 227 x 121 mm This controller is intended for offgrid photovoltaic systems that require efficient MPPT charging, flexible battery compatibility, reliable protection features, and options for expansion and remote monitoring.