As The credit reduces your tax Invoice, you won't necessarily "obtain" anything at all. But after you file your taxes, the credit will decrease your tax Invoice for that year. Labour criticised it as being a "reheated announcement with no new means" and as "far too little far too late". https://www.reddit.com/user/ecograntscheme/comments/1exo5ta/how_to_apply_for_solar_panel_grants_scotland/