The utility model relates to a low voltage switchgear and controlgear field and energy metering equipment field specifically are a low capacity photovoltaic meter measuring tank, its characterized in that is equipped with the box, be equipped with box input, electric wire netting side output, load side output, two sets of electric quantity gauge devices and three switch on the box, the alternating current of photovoltaic inverter output is through the first electric quantity gauge of the group device of box input, in the partly electric energy inflow under the method of operation of generating power for their own use the load side output supplies load side to use, electric wire netting side output is imported through the second electric quantity gauge of group device to partly electric energy under the surplus online method of operation, the utility model discloses a setting of various switches and arrester has improved security and reliability, photovoltaic inverter sets up at the box outsidely for the holistic simple structure of batch meter, small and light, an operation section of thick bamboo makes, easy installation and maintenance, the reliability is high, and the measurement is accurate.