Q: "Is there a more powerful unit other than this one here. I live in Northern Ontario, Canada and the winters up here can be very brutal. Last year I was taken to the hospital with hypo thermia. I got hypo thermia while I was inside the house that I was renting. Something to run the radio and lights a little while later would be nice."
Answer: A power inverter or portable power pack like the 400 watt one is not what you need. You need to purchase a generator that runs on either gasoline or propane. Our experience with the gasoline generators is that they run about 4 to 5 hours before running out of fuel when run at full power. Depending upon the size, you could at least operate an electric heater or an electric blanket or electric throw plus a few other appliances. A 5500 watt gasoline run generator would power your furnace motor so if you heat with natural gas, you'd stay warm. At 50% power, these units are supposed to run 10 to 12 hours.
Hope this helps. Thanks for your question.