Electric power generator with electricity storage device and method for operating the same

Electrical power generator with at least one power source (101) and at least one power storage device (103), wherein a charging circuit is provided and at least one power source (101) and at least one power storage device (103) are electrically connected to one another through the charging circuit (104). The object is to provide this as, in particular, an improved solar power storage system with an accumulator as power storage device (103) at increased efficiency, utilization rate and safety, as well as a method for operating the same. The object is achieved in that the charging circuit does not have DC/DC switching converters (102), the connected power sources (101) each have an open-circuit voltage and the connected power storage devices (103) each have a battery voltage, and the ratio of battery voltage to series PV open-circuit voltage lies between 0.5 and 1.5.