Is ENPH a buy? Has it proven difficult for competitors to duplicate their technology, and/or do thy have a sizable technology lead? Are they a big fish with a significant % of the residential and commercial market? Have any utility-scale systems used Enphase microinverers?
There are two larger companies with 250W microinverters now as competition - one of them also has a 300W unit. Last year, there were none. The competition are the two largest Solar inverter companies in the world, SMA and ABB(who bought PowerOne). ENPH still has not posted a profitable quarter. What utility-scale solar system would use Enphase? Very few unless they sourced them very cheaply. Utility-scale want to build large arrays with very low cost per watt. Attempts are made to keep it under $3/Watt if possible. If SMA and ABB get traction with the installers, ENPH has real problems on their hands. Only my opinion.
I don't think any utility scale installations would use microinverters, regardless of the brand. But, Enphase will obviously lose traction here with the new competitors. I have Enphase inverters on my house, FWIW, they are great. But so might be the other guys.