Abstract: The monitoring system includes: a management server, and a transmission device which obtains, from the power storage system, first charged power index values indicating charged power of the power storage system and input/output power index values indicating input/output power from the power receiving point to which the power storage system is connected to a system, and transmits the index values to the management server via a network. The management server includes: a calculation part which calculates, based on the first charged power index values and the input/output power index values, second charged power index values indicating power charged by generated power of the power generation system connected to the power receiving point of charged power of the power storage system; and a diagnosis part which diagnoses presence or absence of abnormality of the power generation system based on the second charged power index values calculated by the calculation part.

Abstract: The present invention suppresses charges incurred by data communications. A controller transmits data values acquired by sensors to a data center at predetermined intervals. When a predetermined interval has elapsed, a data value to be transmitted is compared with the previously transmitted data value, and in the absence of a change that is equal to or more than a predetermined variation amount, this data value is not transmitted. When such a state in which data values are not transmitted continues for a predetermined interval or more, the data value is transmitted irrespective of the data value variation amount. Further, when the data value has changed abruptly, the data value is transmitted even if the predetermined interval has not yet elapsed. The present invention can be applied to a controller that transmits data values acquired by sensors to a data center for collecting these data values.

Abstract: The present invention suppresses charges incurred by data communications. A controller transmits data values acquired by sensors to a data center at predetermined intervals. When a predetermined interval has elapsed, a data value to be transmitted is compared with the previously transmitted data value, and in the absence of a change that is equal to or more than a predetermined variation amount, this data value is not transmitted. When such a state in which data values are not transmitted continues for a predetermined interval or more, the data value is transmitted irrespective of the data value variation amount. Further, when the data value has changed abruptly, the data value is transmitted even if the predetermined interval has not yet elapsed. The present invention can be applied to a controller that transmits data values acquired by sensors to a data center for collecting these data values.