Equalisation circuit

The solution for this problem is the use of an equalisation circuit, which is essential in systems composed by at least six capacitors in series. This equipment monitors each capacitor testing the voltage across each pair of its terminals, and eventually moves charge from one capacitor to another to guarantee the same value of voltage across the series. 

Equalisation circuits increase the cost of capacitor energy storage systems. They also require energy to work. However, these circuits are very efficient and have a very low current consumption [40]. 

---