@Wisha when we went from analogue to digital metering with solar, SAPN (our DSPN) installed 2 meters.
The Atlas Mk10d for general usage and solar feed in, and an Atlas Mk7a for CL (controlled load).
I am pretty sure DNSPs in various states / regions use different meters though, probably have contracts etc.
After a year or so, and realising we were paying much more than we needed to for the HWS, with the CL and HWS just doing their own thing off the grid, and not affected in any way by our excess solar.
We had the sparky wire the HWS into the main circuit (Atlas Mk10d).
Our Atlas Mk7 now sits in the meter box not recording anything, thought best to leave it there in case we ever want to revert to CL for whatever reason, plan change, retailer change, etc . . .
We had a cheap manual timer put on the HWS circuit, and while I could set that for a few hours during solar soak in summer easy enough, but think it's too 'dangerous' to time it for winter and shoulder months, as the 3.6kw draw, combined with other things we may be using during the day, could easily go over soalr production and draw from the grid, thus cost us more, so we time it now for cheapest TOU we have on our plan (a very cheap midnight to 6am tariff).
The HWS used to be around $1.30 - $1.40 a day on CL, now it's 30c to 40c a day, so a good saving.
In peak summer, I probably will set it for say 1100 - 1500, as we are producing around 7kW to 9kW so can run numerous appliances simultaneously and still not draw from the grid.
That's easily overridden if there is a rogue day of dark cloud / rain etc, can just flick the timer switch off, or change the timer to the cheap time tariff.
If you google your DNSP and perhaps terms like meter type, you might find they have info on what meters they use / supply.
