webmink This would be a good enhancement. I am doing this manually by pre-selecting all slots below 13p then deselecting the most expensive ones (even though below 13p) adding them as exports in the schedule. It takes me about 10 minutes to go through them then verify them (the red arrows showing the exports are really helpful). Starting with no charge (0) I count the slots to add up to 6 by the end (charge = +1, export = -1) and never more than 6 in the middle (7 is a full charge for my batteries). This means I import the maximum at the lowest cost. Finally I set my immersion heater on for the lowest 6 slots to heat my hot water too.
In the schedule below I harvested about £5 during the 24 hours (exported 31 kWh some of which was solar) for an import cost of 80p for 32 kWh. A net gain of £4.20 - not bad for 10 minutes work.
13p = 16.5p x 80%. 16.5p is my export rate and I assume 20% is lost through the batteries.
