Thanks Wookey...

But what do I do when I am away? Quickly run back??

George, not a bad idea the timer for the freezer except it would put internal light off. But well worth considering. Both Fridge Freezer are A+ rated.
The washing machine has a timer, so has the dishwasher so I do indeed plan to run them during the day.
I currently do not heat the DHW with an immersion heater but there is one fitted so the idea is to make the most of the electricity I will be producing as at 3p/kWh exported it is not going to get me rich quickly....
Its the 41p per unit FIT on everything you produce that'll get you rich. The rest is just the cream on the cake
