LiFePO4: ExpertPower’s newest line of batteries – The No.1 Sealed Lead Acid Battery Seller on Amazon. Our LiFePO4 battery provides 2500 - 7000 cycles & a 10 years lifetime with built-in Battery Management System (BMS) protects it from overcharge, deep discharge, overloading, overheating and short circuit, and excessive low self-discharge rate ensuring up to 1 year maintenance-free storage. Built-in low-temp cut off prevents charging under 23 °F (-5 °C). This Off-Grid Solar System Kit includes one 12V200Ah LiFePO4 battery, 4 x 100W Monocrystalline Solar Panels and one 2000W Pure Sine Wave Inverter Charger and one 30A MPPT Solar Charge Controller with bluetooth, one pair 10ft 12AWG MC4 Solar Cables, one pair 6ft 12AWG Battery Cables and 4 x Solar Panel Mounting Brackets. Battery built-in Bluetooth allows easily track the battery level on your phone with the handy app. Monitor the battery State of Charge, temperature, protection warning and all others with just a click of a button on your smartphone. Also supports expansion up to 4 batteries sequenced in either series at 48V 200Ah, or in parallel at 12V 800Ah. The 30A MPPT controller utilizes modern solar technology to maximize your solar array's power generation by over 20% through sophisticated tracking and capture compared to PWM with auto-detects 12V/24V systems. The ExpertPower 2KW Pure Sine Wave Inverter/ 35A Charger is designed to meet the needs of all battery systems including AGM, Wet, Gel, and LiFePO4 with 8 profiles and built-in 30A transfer switch with UPS functionality that automatically switches between shore power and battery power in an industry leading 5ms. It is perfect for installation on an RV, boat, or camper and helps buying and setting up a complete off-grid solar kit simple, quick and easy. The Off-Grid Solar System Kit is ideal for a power system that requires high versatility. The 200Ah battery provides 2560Wh worth of backup power with their efficiency maximized by the 2000W pure sine wave inverter, smart and powerful enough to take full advantage of the battery's 150A discharge current and complimented with four 100W solar panels that can generate up to 20-24A worth of charging current for the batteries, keeping you up and running indefinitely.