To measure power consumption at a low cost in a house provided with a power generator capable of supplying power to a power system.
A power measuring system 201 comprises: a first power measuring slave unit 101A for measuring current that flows through a first power line 91 and a second power line 92, on a power system side to a connection point among the first power line 91, the second power line 92 and a load 121; a second power measuring slave unit 101B for measuring current that flows through the first power line 91 and the second power line 92, on a power generator 106 side to the connection point; and a third power measuring slave unit 101C for comparing phases between the current on the power system side that flows through one of the power line 91 and the second power line 92 and the current on the power generator 106 side that flows through one of the first power line 91 and the second power line 92.
NOZUE YUICHIRO
FUKUI SOICHIRO
