for sale: a battery back up system for your house. It includes everything except batteries for your 120v house electricity. I have had this for quite a while; I got it from my cousin who said as far as he knew, it all worked. System includes a Dimensions Inverter model Dui-24/4400N with input of 25.2 VDC at up to 220 amps; and output of 120 VAC rms 60 HZ; sinewave; UL listed Land Vehicle Inverter & Phtovoltaic Power System Inverter ( I don' know what all this means; I am just copying what it says on the Inverter). A DUVAC II multi management system model 41203, input voltage 12, output voltage 24, output current 20a max, Neg ground, Sure Power Industries Inc.; 4 battery trays 11"x71/2" OD; 20'of copper braided multi strand 3/16" copper; 17" heavy cable attached to inverter; two 5' cables on Duvac II.