Thanks for the initiative.
I used to live in UK so I understand the way you heat water.
I now live in South Africa and we heat water with electricity in a insulated tank with cold water coming in and hot out 200/300 liter tanks and we call it a “Geyser” - huge amusement for the Americans though.
Ok: I have 5Kw PV panels and a two inverters and 3 geysers in our household.
The SMA inverter pushes it’s electricity production to the IN line of my DB box and surplus is pushed into the grid for which I do get credit. But half what I pay for that Kw.
I need to measure Kw flow on the grid line and also MUST know in which direction it goes. (Getting from grid or feeding into the grid).
I then want to get the temp of the water in all three geysers.
I also have to have CT sensors on the geyser lines.
Armed with this readings on one platform, I want to make a few calculations to trigger a relay to switch on the geyser, so I can USE as much of power generated in daytime to STORE energy in the form of hot water.
3 Temperature readers
6 CT sensors (Rather accurate) (to also reading AC / stove etc usage)
All readings dumped into a database so a program can read and make decisions.
emonCMS to show production, usage info on a PC screen reading emonCMS webserver on the Pi and to push to PVOUTPUT.ORG
What hardware do I need to order from you?
What would I still need (except the relays)
Anybody that would be willing to help with this project