Just updated the data logger. It gives you a basic display for current and long term data on the default page and another page with detailed data.
Added energy values for exports, grid, inverter production, self-consumption, and load. It will report these sets of values for 1, 3, 6, and 12 months.
The code now includes the capacity to control a load based on the excess production. Don't actually have a setup to test this on, but should work. The pi has a gpio interface, and you should be able to add relays to that.
The code is at https://github.com/basking-in-the-sun2000/solar-logger