Borisburgh You could add another schedule, from say 14:30 - 15:57 to charge to whatever target % (you need to make it through the peak), and put a condition in to only do this if you battery is below a certain threshold.
Eg. schedule below will use the battery between 14:30-15:57 if the battery is at least 80%. If the battery is below 80%, it will charge to 95%.
Feel free to experiment with your own values.