MrBadger
Badger out
Back in 2017, I used my 2015 daily actual generation and export figures to calculate a ballpark annual saving if I went with, iirc at that time Powerwall 1. It came to approx £120/year. So, assuming £7.5k figure for kit and install, that gives a payback period of over 60 years. An EV would change things, but even adding in an impossible (doesn't take into account losses or charge limits and assumes all stored electricity purchased at 4p/kWh) best case, I cannot see a saving of more than £450/year, so payback period of 16 years, more realistically 20 years plus, which is longer than I would expect its lifespan and certainly much longer than its warranty. More savings should be able to be made in waiting for annual PW cost reductions, but currently they are rising, which can surely only be a blip considering the price reductions most other similar units are experiencing.