The Battery Module worked from the outset not, although the batteries were fine. Switching between the different modes is fiddly and annoying anyway - why not automatic function? The direct operation via the relatively small solar panels worked four months to the satisfaction. After the winter break, the pump no longer made a peep. The wave of plastic on which the motor is located was broken. A lot of money for a few months water fountain. I am trying my luck with another brand.