We have installed both Enphase and initially Solar Edge. Both are great products and under certain circumstances will make your system more productive. Both also have double the working life of a standard string, individual panel monitoring and other extras.

I monitor all my Enphase and Solar Edge sytems each month and while its not an exact scien ce both sets seems to be producing around the same level month.

In my top ten producing systems 55% are Enphase 45% Solar Edge. However that can be down to roof suitability as much as the product.

What we prefer with Enphase is the whole conversion is done on roof so no need for an internal inverter.