I was just wondering if it's still the case that solar panel installations are rated to 16 amps single phase does this apply to all single phase generators on domestic installations
As far as I know the 16A per phase limit (for G83 as was, G98 now) is for all small scale embedded generation, not just PV.
You're not forced to use the G83/G98 approach though - you can generate/export more than that, but you'd have to use G59 as was, G99 now - which doesn't have the 16A limit but requires a much more complicated (expensive) approach.
As far as I know the 16A per phase limit (for G83 as was, G98 now) is for all small scale embedded generation, not just PV.
You're not forced to use the G83/G98 approach though - you can generate/export more than that, but you'd have to use G59 as was, G99 now - which doesn't have the 16A limit but requires a much more complicated (expensive) approach.