And now the future comes to your home! Our self-developed BMS Joulie-16 uses Active Balancing. Here, the charging states of all the cells of a battery are permanently balanced among each other, that is, the energy of the somewhat fuller cells is used to charge the less full. The efficiency of the balancing thus increases to over 92%, compared to 0% in passive balancing. At the same time, active balancing increases the service life of the Li cells by more than 30%, since the cells hardly drift apart in their properties over the years. Another positive side effect is the increased energy yield from the charged battery: with passive balancing the discharge depth (DoD) should not exceed 70% in order to allow a long battery life. With our active balancing, 90% DoD and more are possible without any loss of the service life, ie over 20% more energy at the same nominal capacity.