There is a systematic bug in the behavior if dynamic energy prices. The is no difference between normal price and high price. In normal price, the stem shall do nothing, no charging, no discharging.
The argument is: the efficiency of an electricity round trip is round about 80%. In order to really save money, the price should be preferably 30% above the low-price -threshold in order to start discharging the battery. Otherwise the system is systematically increasing energy costs.
