A beta version of the RHI feed in tariff calculator is now available for Heat pump and Biomass. There is a new button on the system details page where you can input system cost and calculate the payback over seven years. This is a new module if there are any issues please comment via the forum. At the moment the calculation results are available via web page I would be grateful for some feedback as to whether the FIT should be incorporated into the existing performance report or a new report.