1. A system for adaptively updating a predictive model for building equipment or a collection of building equipment, the system comprising: an operating data aggregator module configured to collect a first set of operating data for the building equipment corresponding to a first time period and a second set of operating data for the building equipment corresponding to a second time period; a model generator module configured to generate a first set of model coefficients for the predictive model using the first set of operating data and a second set of model coefficients for the predictive model using the second set of operating data; a test statistic module configured to generate a test statistic based on a difference between the first set of model coefficients and the second set of model coefficients; a critical value module configured to calculate a critical value for the test statistic; a hypothesis testing module configured to perform a statistical hypothesis test comprising comparing the test statistic with the critical value to determine whether the predictive model has changed; and a model update module configured to adaptively update the predictive model in response to a determination that the test statistic exceeds the critical value.