To determine the level of energy savings achieved by the powerPerfector installation, the site's half-hourly data will be analysed using an appropriate, objective process. For complex sites, in line with the internationally recognised IPMVP energy analysis methodology, the metrics that will be used to determine the level of energy savings will be agreed with the client in advance, following our pre-installation assessment. A pre-installation report will be produced for each installation, indicating how the savings will be determined based on previous half-hourly data, and confirming the level of savings that are expected. A final report on the savings and Return on Investment achieved will then be produced 2-3 months after installation. If the ROI achieved is lower than predicted, powerPerfector will rebate such funds as necessary to restore the ROI to the predicted level.