Currently there are three ways of doing this:

1.A string inverter which sits inside you house, usually in your attic or internal garage, and is about the size of wall mounted juke box
2. Micro inverters which fit under each panel and do the conversion on your roof.
3. Power Optimisers which replace the junction box on each panel and as the name suggest optimise the power generated by each panel individually. However there is also still an internal inverter with this system to finish off the conversion.

All have +’s and -‘s.

Its about horses for courses and trusting your installer to recommend the best solution given your circumstances.