One of the reasons demand is light at night is that we run our central heating systems on gas -- mostly imported from Norway or parts east, these days. Per kWh

One of the reasons demand is light at night is that we run our central heating systems on gas -- mostly imported from Norway or parts east, these days. Per kWh, gas heating is a lot cheaper for the consumer. But if we had a serious base load nuclear infrastructure, we could provide much cheaper off-peak electricity for domestic heating, which would smooth out the demand curve significantly.