Electric heat in house
Entirely in addition to the high price of electric weight heat, (that's, despite heat origin) a 1969 residence is practically definitely planning to take advantage of insulation updates in addition to bland best bang-for the dollar stuff no one ever believes is "fancy enough" to choose first - caulking, weatherstripping, and generally reducing environment leakage.
Aided by the development of cold-climate air-air temperature pumps (mini-splits) that's most likely the best direction to find electric heat replacement - 2.2-3.5 times the maximum amount of temperature from same level of electrical energy. But begin with a caulking gun and a will or 12 of spray foam, follow by using much more insulation everywhere you can include it (usually the attic) - THEN contemplate changing the heating units, as it's unlikely might really have that done in this heating season, while you may be air-sealing in minutes and profiting from it in mins - not to mention it is low priced...
Solar power electric panels generally never add up as a heat resource. Direct assortment of heat from sunlight is much more efficient than gathering some the suns power as electrical energy and making use of that for temperature. Costs for the relevant kinds of panels will also be instead various.