[gridspy]

The "only focus on one thing" advice you give is our strategy at GridSpy (http://gridspy.co.nz) too.

We can monitor solar systems, water levels, fuel levels, solar hot water performance, temperature, humidity, battery levels and yes AC power usage.

We can also do automation, controlling all sorts of stuff in all sorts of ways.

However, I'm focusing only on AC power monitoring on our site, at least for now. Anything else is hard to explain and install, and much more expensive to sell.