Use your excess energy on sunny days
Excess solar energy will almost always be available after midday when the sun is shining, so the best time to use appliances like washing machines is between midday and 1 hour before sunset, so you keep your batteries full for when the sun goes down.
Use an energy efficient heating system
and ensure your house is properly insulated to keep the warmth in. Use timers to make sure heaters are only on when you need them.
Use energy efficient products
such as LED lighting and high efficiency rated appliances.