The Enphase microinverter solutions include one of the best solar panel monitoring software packages, Enlighten, that I have seen.  Enlighten is a web-based subscription-priced solar panel monitoring solution.

It is simple to install, remotely monitored, utilizes a web-based user-to-system interface and provides information detail to the module level.

There are two key differentiators to Enphase’s solution. First, the ability to monitor and present graphically with module-level detail.  Second, the ability to graphically review historical power generation by module.  Information like this aids in the analysis and problem determination of module performance.  Ultimately, this will save you money by identifying persistent problems – a bad panel or a shade problem.

Hardware - Per the company’s website, installation is a simple four (4) step process.

1. Register
2. Install – PV modules and microinverters
3. Connect – Install Envoy communications gateway
4. Assign -  generate the module array.

Communication – Enphase’s Envoy Communication Gateway is a small 110 volt broadband router that connects via integrated wireless to the Enphase microinverters.  The Enlighten monitoring software accesses the module information via Envoy.

Pricing  – subscription-based service priced per module monitored.  Web prices fluctuate widely, but it appears at this time that a fair price is $2.65 per module per year.

This is the best residential solution I have reviewed, but it comes at a small, recurring, price.  See more about this solution at http://enphase.com/products/enlighten/