"Looking for some low-cost power backup? Given recent storms and the growing number of blackouts, you certainly have company—and perhaps fresh memories of spoiled food, a flooded basement, no heat or air conditioning and (if you have well water) no water for bathing or household chores....We found that inverters can keep at least some of your home’s essentials energized. But you’ll need to prioritize: Even the smaller, 900-watt PW900-12 was able to run a freezer, two refrigerators, two sump pumps, lights, and chargers for various electronics for our staffer at home—but not all at once. ."