The house is using about 926W and the batteries are charging at a rate of 1,3kW. The batteies are used in the evening until they drop to 60% state of charge whereupon grid power is used (unless there is no grid power then the batteries will continue down below 60%). During the next day rthe solar charges the batteries up again so I'm not using grid power to charge the batteries (I can set a schedule to charge from grid power if I wish eg. late every afternoon if batteries are not fully charged).