Curiosity. Your solar panels generate power during the day not night, but you probably do not have a battery system to use your own generated power at night. Have you considered that the bulk of your power consumption might be after dusk when your solar system is not supplying it and the grid will be?
Consider that the retired might be watching the TV, doing the laundry, and using computers during the time the solar system is generating, or perhaps everyone is out and about more often than not during the day, If your usage pattern during 'sun time' was already on the low side you might not see much advantage from solar in your bill.
If that is the case your most visible benefit would not be significantly less consumption, just whatever you get from the feed-in tariff.
Could you be more specific what 'eye wateringly high means' and where you are located?