Hi Jason,
This is a reasonable quote from Solarhart. SolarEdge is one of the leading (premium) inverters on the market and has some great features, the main benefit being the panel optimisers which enable each panel to operate independently.
For the price quoted I would expect to get the energy meter installed as well (which gives you full household consumption monitoring as well as solar generation)
The SILHOUETTE solar panels are a reasonable panel but I wouldn’t consider them a premium level panel, more of a mid-level panel, but still good quality.
Have you recieved any other quotes?