A system for determining the state of health of a generator battery and the ability of the battery to supply a generator starter motor with start-up energy, the system comprising: a generator having a starter motor and electrical outputs; a battery electrically coupled to the starter motor of the generator; a monitoring system including an electrical meter electrically coupled to the electrical outputs of the generator and to the battery and including a controller configured to provide a signal to the generator to start and to provide a signal to the electrical meter to begin measuring the measurements of battery voltage over time with a pre-trigger capture delay prior to the beginning of a generator starting operation, the monitoring system being configured to: monitor electrical characteristics of power supplied from the electrical outputs of the generator, capture measurements of battery voltage over time across terminals of the battery during a supply of electrical energy from the battery to the starter motor during the generator starting operation, define one or more regions of reference measurements of battery voltage over time during a generator starting operation, each of the one or more regions having a duration and a magnitude of voltage change, generate one or more mathematical equations describing the measurements of battery voltage over time in the one or more regions, define statistical process control limits about the one or more mathematical equations; compare the captured measurements of battery voltage over time to reference measurements of battery voltage over time and determine if a difference in voltage values between the captured measurements of battery voltage over time and reference measurements of battery voltage over time exceeds an acceptable amount; and issue a warning responsive to data points in the captured measurements of battery voltage over time violating a statistical process control rule relative to the statistical process control limits. a generator having a starter motor and electrical outputs; a battery electrically coupled to the starter motor of the generator; a monitoring system including an electrical meter electrically coupled to the electrical outputs of the generator and to the battery and including a controller configured to provide a signal to the generator to start and to provide a signal to the electrical meter to begin measuring the measurements of battery voltage over time with a pre-trigger capture delay prior to the beginning of a generator starting operation, the monitoring system being configured to: monitor electrical characteristics of power supplied from the electrical outputs of the generator, capture measurements of battery voltage over time across terminals of the battery during a supply of electrical energy from the battery to the starter motor during the generator starting operation, define one or more regions of reference measurements of battery voltage over time during a generator starting operation, each of the one or more regions having a duration and a magnitude of voltage change, generate one or more mathematical equations describing the measurements of battery voltage over time in the one or more regions, define statistical process control limits about the one or more mathematical equations; compare the captured measurements of battery voltage over time to reference measurements of battery voltage over time and determine if a difference in voltage values between the captured measurements of battery voltage over time and reference measurements of battery voltage over time exceeds an acceptable amount; and issue a warning responsive to data points in the captured measurements of battery voltage over time violating a statistical process control rule relative to the statistical process control limits. monitor electrical characteristics of power supplied from the electrical outputs of the generator, capture measurements of battery voltage over time across terminals of the battery during a supply of electrical energy from the battery to the starter motor during the generator starting operation, define one or more regions of reference measurements of battery voltage over time during a generator starting operation, each of the one or more regions having a duration and a magnitude of voltage change, generate one or more mathematical equations describing the measurements of battery voltage over time in the one or more regions, define statistical process control limits about the one or more mathematical equations; compare the captured measurements of battery voltage over time to reference measurements of battery voltage over time and determine if a difference in voltage values between the captured measurements of battery voltage over time and reference measurements of battery voltage over time exceeds an acceptable amount; and issue a warning responsive to data points in the captured measurements of battery voltage over time violating a statistical process control rule relative to the statistical process control limits.