Magnum Energy ME2012-20B ME-Series 2000W 12VDC Modified Sine Inverter/100 Amp PFC Charger/2-20A AC Breakers, Easy-to-install, Versatile mounting, Multiple ports, Convenient switches, Expanded transfer relay Easy-to-install: Install the ME Series in four easy steps: simply connect the inverters output to your distribution circuits or electrical panel, connect your shore power cable (AC) to the inverters easy-to-reach terminal block, connect the batteries, and switch on the power Power Factor Corrected (PFC) Charger: Our PFC charger is built into all of our inverter/chargers. It uses less energy from a generator than a standard charger  using 25-30% less AC current than standard chargers Multiple ports: The ME Series provides multiple ports, including an RS485 communication port for network expansion, and a remote port Lightweight: The lightweight aluminum base and cover also provides noise reduction and corrosion resistance Safe and reliable: The ME Series is ETL Listed to the stringent requirements of UL/cUL 458 and CSA C22.2 #107.1-01, ensuring that the inverter is safe and reliable