Electric heating options when on shore power?

We use a 1500 watt electric heater in the living area during the day to keep that area comfortable. If it's below 40 out, it supplements the propane furnace. At night we do not run the electric heat, but set the furnace at 60 for overnight and turn it to 70 when we get up to warm the inside. Then it's back to the electric only. We stay comfortable. Of course we do try to winter where it's warm and the heat isn't necessary too much.