The other option is just wait for hydrogen and get a hydrogen-ready boiler, or wait for district heating. Again, powered by a fuel cell (initially biogas or natural gas, and then hydrogen when it's available), this provides constant power and heat. Ideal if there is a local district heating network

Home fuel cells for larger houses would be ideal. These feed back into the local grid like solar panels if this option is available; you produce your own electricity, and you make money by selling the excess

Japan have 150,000 home fuel cells; which do not require external electricity generation