I was told about old meters spinning backwards by the electrician who split my DB during the installation.
I said that doesn’t sound good. He was enthusiastic about it. But I said, OK… let’s say the meters have 6 digits to the left of the decimal place, your opening reading is 123456 and you closing reading is 123440, now what is the computer involved going to conclude? And do you want a bill for that amount?
The very least that is going to happen (assuming somebody is awake and spots the out of range number) is that the municipality is going to come and ask you some questions.
So yes, you’d have to manage it.
Even then the municipality is going to notice the drop off on your meter and - see above - come and ask some questions and have a look at what’s happening.
This happened to me when I got my system installed, and this is scenario has played out repeatedly in my neck of the woods as more and more folks have put in solar. Your consumption drops off substantially. It stays down for another month. Some rule on the City’s system is triggered and they send a technician around to do an inspection and ask you some questions.
The reality is that when you install solar your meter readings quickly become a big red flag for the city.
Even if you’re on prepaid, because you’re going to start buying less and less often. Again their systems spot the change and the red flag has been waved.
You’re not just going to pay less and smile all the way to the bank, not without somebody wanting to have a look at your meter and the connections to it.
If your consumption goes negative then I would expect the billing system to hit you with a large number. You, of course, will protest this. But all roads lead not to the end of the rainbow but to somebody coming to see what the heck is going on at your property,
There is no escaping it, that I can see.