Power storage power conditioner

A power storage power conditioner, comprising:

• an input part to which direct current (DC) power of a first predetermined voltage is input;
• a voltage-transforming part which transforms the first predetermined voltage of the DC power input to the input part into a second predetermined voltage;
• a first input-output part which outputs the DC power transformed into the second predetermined voltage to a battery unit and inputs DC power from the battery unit;
• a converting part which converts the DC power input to the input part into alternating current (AC) power;
• and
• a second input-output part which outputs the AC power to a power system or a load and inputs AC power from the power system,
• wherein the converting part converts the AC power input to the second input-output part into DC power,
• the voltage-transforming part transforms a voltage of the DC power converted by the converting part into the second predetermined voltage, and transforms a voltage of the DC power input to the first input-output part into a third predetermined voltage, and
• the converting part converts the DC power transformed into the third predetermined voltage by the voltage-transforming part into AC power.