Your returns are similar to mine. Has anybody been able to calculate how many years it will take to recover their outlay? Octopus Flux calculates your usage based on the average amount of Kw used across the 3 consumption rates; the Exported income is calculated in the same way. However, all of this is distorted by the extortionate standing charge rate. I have derived that both my gas and electricity usage, from the grid, has halved in my first year. I have a 4.8Kwh system, both panels and battery. Is there a mathematician who can help?