Negative Grounding MPPT Solar Charge Controller Tracer4215BN, The Advanced MPPT Control Algorithm makes this 40 Amp MPPT Controller Tracking Efficiency higher than 99.5% 150V Max PV Input Allow this Charge Controller Handles More Solar Panels Wiring in Series to minimize PV current, 5 x 12V Solar Panel Connecting in Series will be applicable Work with all Lead Acid Batteries, Sealed AGM GEL and Flooded Battery, User mode allows buyer setting their own charging parameters for Lithium Batteries (LiFePO4) RS-485 communication bus interface and Standard MODBUS interface available to meet various communication requirements, Temperature Sensor and PC monitoring Cable Attached This 40 amp MPPT Solar Panel Charger works with 600W Solar Panel on 12V Battery System and 1200W on 24V Battery. Max Solar Panel 1560W, multiple load mode allow you set the load on/off in different situation. A Solid State Relay is recommended if you are using a Power Inverter